Id int64 4 8.51M | PostTypeId int64 1 7 | AcceptedAnswerId int64 7 75.5M ⌀ | ParentId int64 4 41.8M ⌀ | Score int64 -208 27.7k | ViewCount int64 11 12.4M ⌀ | Body stringlengths 0 45k | Title stringlengths 2 150 ⌀ | ContentLicense stringclasses 3
values | FavoriteCount int64 0 225 ⌀ | CreationDate stringdate 2008-07-31 21:42:52 2011-12-14 18:48:47 | LastActivityDate stringdate 2008-08-01 12:19:17 2023-03-05 04:40:26 | LastEditDate stringdate 2008-08-01 13:54:25 2023-03-05 03:12:45 ⌀ | LastEditorUserId int64 -1 21.3M ⌀ | OwnerUserId int64 -1 21.1M ⌀ | Tags listlengths 1 6 ⌀ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
34,482 | 2 | null | 13,941 | 12 | null | If you have PyObjC (the Python - Objective-C bridge) installed or are running on OS X 10.5's system python (which ships with PyObjC), you can do
```
from AppKit import NSBeep
NSBeep()
```
to play the system alert.
| null | CC BY-SA 2.5 | null | 2008-08-29T15:47:05.843 | 2008-08-29T15:47:05.843 | null | null | 2,140 | null |
34,454 | 2 | null | 33,476 | 20 | null | There is a pretty good diagram in the [JSF specification](http://java.sun.com/javaee/javaserverfaces/download.html) that shows the request lifecycle - essential for understanding this stuff.
The steps are:
- - - - - - - -
This is a somewhat simplified version of events. Refer to the specification for more details.
... | null | CC BY-SA 2.5 | null | 2008-08-29T15:09:23.110 | 2008-08-29T15:09:23.110 | null | null | 304 | null |
34,481 | 2 | null | 34,439 | 27 | null | On top of the more direct answers, I'd be remiss if I didn't mention [IPython](http://ipython.scipy.org/).
Hit to see the available methods, with autocompletion.
And once you've found a method, try:
```
help(object.method)
```
to see the pydocs, method signature, etc.
Ahh... [REPL](http://en.wikipedia.org/wiki/REPL).... | null | CC BY-SA 4.0 | null | 2008-08-29T15:47:04.517 | 2020-12-02T13:09:00.997 | 2020-12-02T13:09:00.997 | 63,550 | 1,480 | null |
34,480 | 2 | null | 34,398 | 2 | null | Your issue with mixing data may be how Sql 2005 sorts text data. It's not a 'natural' sort.
If you have a varchar field and you do:
```
where value > '20.5'
```
Values like "5" will be in your result (as in a character based sort "5" comes after "20.5")
You're going to be better off with separate columns for stora... | null | CC BY-SA 2.5 | null | 2008-08-29T15:44:36.673 | 2008-08-29T15:44:36.673 | null | null | 905 | null |
34,474 | 2 | null | 34,312 | 35 | null | I prefer PHPUnit now, but when I started out I used SimpleTest as I didn't always have access to the command line. SimpleTest is nice, but the only thing it really has over PHPUnit, in my opinion, is the web runner.
The reasons I like PHPUnit are that it integrates with other PHP developer tools such as [phing](http:... | null | CC BY-SA 3.0 | null | 2008-08-29T15:40:41.550 | 2011-10-01T22:30:14.967 | 2011-10-01T22:30:14.967 | 2,594 | 2,594 | null |
34,490 | 1 | 34,514 | null | 164 | 92,108 | [SHA Hash functions](http://en.wikipedia.org/wiki/SHA-1)
| How do I create a SHA1 hash in ruby? | CC BY-SA 2.5 | 0 | 2008-08-29T15:49:08.113 | 2013-11-06T17:51:39.103 | 2008-08-29T16:06:28.743 | 3,624 | 3,624 | [
"ruby",
"hash",
"sha1"
] |
34,476 | 1 | 34,504 | null | 12 | 681 | I have to do some JavaScript in the future, so it is time to update my toolbox. Right now I use Firefox with some addons:
- [https://www.squarefree.com/bookmarklets/webdevel.html](https://www.squarefree.com/bookmarklets/webdevel.html)- - - -
I plan to use [Venkman Javascript debugger](http://www.hacksrus.com/~ginda/... | What is in your JavaScript development toolbox? | CC BY-SA 3.0 | 0 | 2008-08-29T15:41:45.060 | 2013-06-08T13:48:15.473 | 2013-06-08T13:46:56.187 | 938,089 | 720 | [
"javascript",
"debugging"
] |
34,492 | 2 | null | 34,476 | 1 | null |
1. Web Developer Toolbar (Firefox Addon)
2. Nikhil's Web Development Helper (IE Toolbar)
| null | CC BY-SA 2.5 | null | 2008-08-29T15:49:08.647 | 2008-08-29T15:49:08.647 | null | null | 2,343 | null |
34,499 | 2 | null | 34,488 | 0 | null | I believe the LIMIT is something done after the data set is found and the result set is being built up so I wouldn't expect it to make any difference at all. Making name the primary key will have a significant positive effect though as it will result in an index being made for the column.
| null | CC BY-SA 2.5 | null | 2008-08-29T15:51:53.130 | 2008-08-29T15:51:53.130 | null | null | 3,382 | null |
34,488 | 1 | 34,500 | null | 34 | 11,061 | Will limiting a query to one result record, improve performance in a large(ish) MySQL table if the table only has one matching result?
for example
```
select * from people where name = "Re0sless" limit 1
```
if there is only one record with that name? and what about if `name` was the primary key/ set to unique? and... | Does limiting a query to one record improve performance | CC BY-SA 2.5 | 0 | 2008-08-29T15:48:23.390 | 2009-03-29T18:33:52.347 | null | null | 2,098 | [
"sql",
"mysql",
"database"
] |
34,493 | 1 | 34,719 | null | 5 | 2,493 | We have a few very large Excel workbooks (dozens of tabs, over a MB each, very complex calculations) with many dozens, perhaps hundreds of formulas that use the dreaded INDIRECT function. These formulas are spread out throughout the workbook, and target several tables of data to look-up for values.
Now I need to move ... | Excel: list ranges targeted by INDIRECT formulas | CC BY-SA 2.5 | null | 2008-08-29T15:49:25.307 | 2020-02-07T00:17:53.503 | 2020-02-07T00:17:53.503 | 4,240,030 | 2,230 | [
"excel",
"vba"
] |
34,496 | 2 | null | 34,476 | 0 | null | A couple more::
1. IE Explorer Toolbar
2. Firefox Developer Toolbar
| null | CC BY-SA 2.5 | null | 2008-08-29T15:50:17.737 | 2008-08-29T15:50:17.737 | null | null | 2,017 | null |
34,501 | 2 | null | 34,488 | 0 | null | If "name" is unique in the table, then there may still be a (very very minimal) gain in performance by putting the limit constraint on your query. If name is the primary key, there will likely be none.
| null | CC BY-SA 2.5 | null | 2008-08-29T15:52:42.817 | 2008-08-29T15:52:42.817 | null | null | 1,975,282 | null |
34,500 | 2 | null | 34,488 | 44 | null | If the column has
it's no faster
because it will prevent sending any additional rows beyond the first matched, if any exist
- -
| null | CC BY-SA 2.5 | null | 2008-08-29T15:51:55.847 | 2009-03-29T18:01:57.230 | 2009-03-29T18:01:57.230 | 2,774 | 2,774 | null |
34,486 | 1 | 34,538 | null | 5 | 328 | I have a small JS function that does Ajax for me and another like it that adds in POST data to the request. With Ajax being such a big topic with so many libraries about it, what am I missing from my function, is it insecure or something else worrying?
```
function loadPage(pagePath, displayElement)
{
var xmlHttp;... | What more is needed for Ajax than this function | CC BY-SA 2.5 | null | 2008-08-29T15:48:16.307 | 2011-07-20T11:22:25.657 | null | null | 1,384,652 | [
"javascript",
"ajax"
] |
34,508 | 2 | null | 34,488 | 2 | null | To answer your questions in order:
1) yes, if there is no index on name. The query will end as soon as it finds the first record. take off the limit and it has to do a full table scan every time.
2) no. primary/unique keys are guaranteed to be unique. The query should stop running as soon as it finds the row.
| null | CC BY-SA 2.5 | null | 2008-08-29T15:55:07.460 | 2008-08-29T15:55:07.460 | null | null | 2,884 | null |
34,507 | 2 | null | 34,399 | 4 | null | The browser displays the bullets because the style property "display" is initially set to "list-item". Changing the display property to "inline" cancels all the special styles that list items get. You should be able to simulate it with the :before selector and the content property, but IE (at least through version 7) d... | null | CC BY-SA 2.5 | null | 2008-08-29T15:54:47.883 | 2008-08-29T15:54:47.883 | null | null | 619 | null |
34,511 | 2 | null | 34,505 | 0 | null | By default it does it based on the reference to the object, but that means that it's the exact same object, so both would return the same hash. But a hash should be based on the value, like in the case of the string class. "a" and "b" would have a different hash, but "a" and "a" would return the same hash.
| null | CC BY-SA 2.5 | null | 2008-08-29T15:56:17.550 | 2008-08-29T15:56:17.550 | null | null | 77 | null |
34,504 | 2 | null | 34,476 | 8 | null | I use both Firefox and IE for Web Development and a few add-ons in each:
- [Firebug](https://addons.mozilla.org/en-US/firefox/addon/1843)- [Web Developer Toolbar](https://addons.mozilla.org/en-US/firefox/addon/60)
- [IE Developer Toolbar](http://www.microsoft.com/en-us/download/details.aspx?id=18359)- [Fiddler](h... | null | CC BY-SA 3.0 | null | 2008-08-29T15:54:11.580 | 2013-06-08T13:48:15.473 | 2013-06-08T13:48:15.473 | 938,089 | 1,804 | null |
34,513 | 2 | null | 13,927 | 5 | null | A bit of extra info that I've gained by painful experience: although NSNotificationCenter uses zeroing weak references when running under garbage collection, KVO does not. Thus, you can get away with not removing an NSNotificationCenter observer when using GC (when using retain/release, you still need to remove your ob... | null | CC BY-SA 2.5 | null | 2008-08-29T15:56:34.167 | 2008-08-29T15:56:34.167 | null | null | 2,140 | null |
34,502 | 2 | null | 34,390 | 65 | null | Here's what I did:
```
<link rel="Stylesheet" type="text/css" href="Stylesheet.css" id="style" runat="server" visible="false" />
```
It fools Visual Studio into thinking you've added a stylesheet to the page but it doesn't get rendered.
---
Here's an even more concise way to do this with multiple references;
`... | null | CC BY-SA 2.5 | null | 2008-08-29T15:52:43.770 | 2008-11-25T22:35:52.873 | 2008-11-25T22:35:52.873 | 1,249 | 1,249 | null |
34,514 | 2 | null | 34,490 | 395 | null | ```
require 'digest/sha1'
Digest::SHA1.hexdigest 'foo'
```
| null | CC BY-SA 2.5 | null | 2008-08-29T15:56:48.347 | 2008-08-29T15:56:48.347 | null | null | 3,366 | null |
34,505 | 1 | 34,541 | null | 26 | 9,043 | The MSDN documentation on [Object.GetHashCode()](http://msdn.microsoft.com/en-us/library/system.object.gethashcode.aspx) describes 3 contradicting rules for how the method should work.
1. If two objects of the same type represent the same value, the hash function must return the same constant value for either objec... | Is Object.GetHashCode() unique to a reference or a value? | CC BY-SA 3.0 | 0 | 2008-08-29T15:54:15.870 | 2015-09-23T09:48:08.830 | 2012-06-22T03:38:48.697 | 392 | 392 | [
"c#",
".net"
] |
34,516 | 1 | 34,533 | null | 38 | 22,280 | Is there a standard convention (like phpdoc or python's docstring) for commenting C# code so that class documentation can be automatically generated from the source code?
| Is there a standard (like phpdoc or python's docstring) for commenting C# code? | CC BY-SA 2.5 | 0 | 2008-08-29T15:57:44.537 | 2018-02-23T18:09:42.743 | null | null | 305 | [
"c#",
"comments"
] |
34,519 | 1 | null | null | 414 | 273,761 | A semaphore is a programming concept that is frequently used to solve multi-threading problems. My question to the community:
What is a semaphore and how do you use it?
| What is a semaphore? | CC BY-SA 2.5 | 0 | 2008-08-29T15:58:15.957 | 2022-02-14T14:03:13.893 | null | null | 1,931 | [
"multithreading",
"concurrency",
"semaphore"
] |
34,512 | 1 | 34,520 | null | 193 | 153,791 | When writing multi-threaded applications, one of the most common problems experienced are deadlocks.
My questions to the community are:
1. What is a deadlock?
2. How do you detect them?
3. Do you handle them?
4. And finally, how do you prevent them from occurring?
| What is a deadlock? | CC BY-SA 3.0 | 0 | 2008-08-29T15:56:27.020 | 2023-01-21T09:51:55.513 | 2016-02-26T00:09:46.227 | 3,128,926 | 1,931 | [
"multithreading",
"concurrency",
"locking",
"deadlock"
] |
34,518 | 1 | null | null | 23 | 10,618 | How do you sort an array of strings [naturally](http://blog.codinghorror.com/sorting-for-humans-natural-sort-order/) in different programming languages? Post your implementation and what language it is in in the answer.
| Natural Sorting algorithm | CC BY-SA 3.0 | 0 | 2008-08-29T15:57:49.607 | 2022-03-29T21:02:06.817 | 2014-12-11T19:47:03.423 | 4,279 | 1,585 | [
"algorithm",
"language-agnostic",
"sorting",
"natural-sort"
] |
34,510 | 1 | 34,550 | null | 1,277 | 828,532 | When writing multithreaded applications, one of the most common problems experienced is race conditions.
My questions to the community are:
- - - -
| What is a race condition? | CC BY-SA 4.0 | 0 | 2008-08-29T15:55:10.457 | 2022-11-03T01:28:25.220 | 2021-10-15T15:42:04.900 | 179,850 | 1,931 | [
"multithreading",
"concurrency",
"terminology",
"race-condition"
] |
34,522 | 2 | null | 34,512 | 2 | null | Deadlock occurs when two threads aquire locks which prevent either of them from progressing. The best way to avoid them is with careful development. Many embedded systems protect against them by using a watchdog timer (a timer which resets the system whenever if it hangs for a certain period of time).
| null | CC BY-SA 2.5 | null | 2008-08-29T15:59:07.077 | 2008-08-29T15:59:07.077 | null | null | 317 | null |
34,529 | 2 | null | 34,519 | -6 | null | A semaphore is a way to lock a resource so that it is guaranteed that while a piece of code is executed, only this piece of code has access to that resource. This keeps two threads from concurrently accesing a resource, which can cause problems.
| null | CC BY-SA 2.5 | null | 2008-08-29T16:01:36.133 | 2008-08-29T16:01:36.133 | null | null | 2,328 | null |
34,509 | 1 | 2,060,952 | null | 47 | 38,361 | We have a large database on which we have DB side pagination. This is quick, returning a page of 50 rows from millions of records in a small fraction of a second.
Users can define their own sort, basically choosing what column to sort by. Columns are dynamic - some have numeric values, some dates and some text.
Whil... | Natural (human alpha-numeric) sort in Microsoft SQL 2005 | CC BY-SA 3.0 | 0 | 2008-08-29T15:55:10.223 | 2022-03-04T21:56:25.217 | 2014-03-11T17:27:33.003 | 59,303 | 905 | [
"sql-server",
"sql-server-2005",
"sorting",
"natural-sort"
] |
34,524 | 1 | null | null | 900 | 429,762 | A mutex is a programming concept that is frequently used to solve multi-threading problems. My question to the community:
What is a mutex and how do you use it?
| What is a mutex? | CC BY-SA 2.5 | 0 | 2008-08-29T15:59:25.437 | 2022-03-01T10:13:09.480 | null | null | 1,931 | [
"multithreading",
"concurrency",
"mutex"
] |
34,523 | 2 | null | 32,871 | 7 | null | The trick is to use some simple JavaScript to resize the Flash DOM node:
```
function resizeFlash( h ) {
// "flash-node-id" is the ID of the embedded Flash movie
document.getElementById("flash-node-id").style.height = h + "px";
}
```
Which you call from within the Flash movie like this:
```
ExternalInterfac... | null | CC BY-SA 2.5 | null | 2008-08-29T15:59:24.750 | 2008-08-29T15:59:24.750 | null | null | 1,109 | null |
34,506 | 1 | 35,201 | null | 12 | 6,842 | Is there anyway to have a sort of virtual static member in C++?
For example:
```
class BaseClass {
public:
BaseClass(const string& name) : _name(name) {}
string GetName() const { return _name; }
virtual void UseClass() = 0;
private:
const string _name;
};
class DerivedClass :... | Simulating a virtual static member of a class in c++? | CC BY-SA 2.5 | 0 | 2008-08-29T15:54:46.167 | 2022-08-01T08:01:17.910 | null | null | 3,373 | [
"c++",
"virtual-functions"
] |
34,520 | 2 | null | 34,512 | 246 | null | A occurs when multiple processes try to access the same resource at the same time.
One process loses out and must wait for the other to finish.
A occurs when the waiting process is still holding on to another resource that the first needs before it can finish.
So, an example:
Resource A and resource B are used by... | null | CC BY-SA 2.5 | null | 2008-08-29T15:58:34.957 | 2008-08-29T16:06:02.753 | 2008-08-29T16:06:02.753 | 905 | 905 | null |
34,532 | 2 | null | 34,516 | 1 | null | C# has built in [documentation commands](https://learn.microsoft.com/en-us/dotnet/csharp/codedoc)
Have fun!
| null | CC BY-SA 3.0 | null | 2008-08-29T16:01:58.910 | 2018-02-23T18:09:42.743 | 2018-02-23T18:09:42.743 | 3,590 | 3,590 | null |
34,530 | 2 | null | 34,516 | 3 | null | ```
/// <summary>
///
/// </summary>
/// <param name="strFilePath"></param>
```
[http://msdn.microsoft.com/en-us/magazine/cc302121.aspx](http://msdn.microsoft.com/en-us/magazine/cc302121.aspx)
| null | CC BY-SA 2.5 | null | 2008-08-29T16:01:37.493 | 2008-08-29T16:01:37.493 | null | null | 1,293 | null |
34,528 | 2 | null | 34,518 | 5 | null |
```
Array.prototype.alphanumSort = function(caseInsensitive) {
for (var z = 0, t; t = this[z]; z++) {
this[z] = [], x = 0, y = -1, n = 0, i, j;
while (i = (j = t.charAt(x++)).charCodeAt(0)) {
var m = (i == 46 || (i >=48 && i <= 57));
if (m !== n) {
this[z][++y] = "";
n = m;
... | null | CC BY-SA 2.5 | null | 2008-08-29T16:01:29.880 | 2008-08-29T16:01:29.880 | null | null | 1,585 | null |
34,538 | 2 | null | 34,486 | 13 | null | I strongly recommend you not roll your own Ajax code. Instead, use a framework such as Prototype, Dojo, or any of the others. They've taken care of handling all the ReadyStates you're not handling (2 means it's been sent, 3 means it's in process, etc.), and they should escape the reponse you're getting so you don't ins... | null | CC BY-SA 2.5 | null | 2008-08-29T16:03:11.933 | 2008-08-29T16:03:11.933 | null | null | 3,098 | null |
34,539 | 2 | null | 34,486 | 6 | null | I would remove this line.
```
alert("Your browser does not support AJAX!")
```
Shouting at the user in a language he probably doesn't understand is worse than failure. :-)
| null | CC BY-SA 2.5 | null | 2008-08-29T16:03:13.870 | 2008-08-29T16:03:13.870 | null | null | 437 | null |
34,525 | 2 | null | 34,476 | 3 | null | I sometimes use Emacs with Steve Yegge's [js2-mode](http://code.google.com/p/js2-mode/), evaluating code with [Rhino](http://www.mozilla.org/rhino/) & John Resig's [env.js](http://ejohn.org/blog/bringing-the-browser-to-the-server/) to load jQuery or Prototype in my standalone scripts.
This allows me to explore javascr... | null | CC BY-SA 2.5 | null | 2008-08-29T16:00:47.447 | 2008-08-29T16:08:56.913 | 2008-08-29T16:08:56.913 | 2,797 | 2,797 | null |
34,537 | 2 | null | 34,510 | 39 | null | A race condition is a kind of bug, that happens only with certain temporal conditions.
Example:
Imagine you have two threads, A and B.
In Thread A:
```
if( object.a != 0 )
object.avg = total / object.a
```
In Thread B:
```
object.a = 0
```
If thread A is preempted just after having check that object.a is no... | null | CC BY-SA 3.0 | null | 2008-08-29T16:03:06.537 | 2013-05-16T05:08:54.293 | 2013-05-16T05:08:54.293 | 369 | 1,578 | null |
34,543 | 2 | null | 34,516 | 1 | null | Microsoft uses "[XML Documentation Comments](http://msdn.microsoft.com/en-us/library/b2s063f7.aspx)" which will give IDE intellisense descriptions and also allow you to auto-generate MSDN-style documentation using a tool such as Sandcastle if you turn on the generation of the XML file output.
To turn on the generation... | null | CC BY-SA 2.5 | null | 2008-08-29T16:04:10.730 | 2008-08-29T16:04:10.730 | null | null | 392 | null |
34,536 | 1 | 34,710 | null | 21 | 42,684 | This most be the second most simple rollover effect, still I don't find any simple solution.
I have a list of items and a corresponding list of slides (DIVs). After loading, the first list item should be selected (bold) and the first slide should be visible. When the user hovers over another list item, that list item... | How do you swap DIVs on mouseover (jQuery)? | CC BY-SA 4.0 | 0 | 2008-08-29T16:02:59.050 | 2019-03-22T15:08:58.550 | 2019-03-22T15:08:58.550 | 7,079,025 | 3,377 | [
"javascript",
"jquery",
"html",
"css"
] |
34,542 | 2 | null | 34,518 | 5 | null | For MySQL, I personally use code from a Drupal module, which is available at hhttp://drupalcode.org/project/natsort.git/blob/refs/heads/5.x-1.x:/natsort.install.mysql
Basically, you execute the posted SQL script to create functions, and then use `ORDER BY natsort_canon(field_name, 'natural')`
Here's a readme about th... | null | CC BY-SA 3.0 | null | 2008-08-29T16:03:47.940 | 2013-11-06T11:36:56.253 | 2013-11-06T11:36:56.253 | 428 | 979 | null |
34,544 | 1 | 63,555 | null | 1 | 839 | I am writing a Browser Helper Object for ie7, and I need to detect DOM modification (i.e. via AJAX).
So far I couldn't find any feasible solution.
| Detect DOM modification in Internet Explorer | CC BY-SA 2.5 | 0 | 2008-08-29T16:04:25.113 | 2008-09-15T14:46:49.790 | 2008-08-31T00:10:56.247 | 383 | 3,448 | [
"c++",
"internet-explorer",
"internet-explorer-7",
"bho"
] |
34,533 | 2 | null | 34,516 | 40 | null | You can use XML style comments, and use tools to pull those comments out into API documentation.
Here is an example of the comment style:
```
/// <summary>
/// Authenticates a user based on a username and password.
/// </summary>
/// <param name="username">The username.</param>
/// <param name="password">The password... | null | CC BY-SA 2.5 | null | 2008-08-29T16:02:39.923 | 2008-08-29T16:02:39.923 | null | null | 1,960 | null |
34,547 | 2 | null | 34,463 | 5 | null | The way that windows locks open files might cause an issue requiring you to hook into the Volume Shadowcopy Service.
About two years ago this fellow ported the algorithm to C#. I haven't taken a look at the code (or the provided binary), but it might be a place to start looking or someone to try contacting.
[http:/... | null | CC BY-SA 2.5 | null | 2008-08-29T16:04:44.177 | 2008-08-29T16:04:44.177 | null | null | 3,269 | null |
34,548 | 2 | null | 34,524 | 78 | null | When you have a multi-threaded application, the different threads sometimes share a common resource, such as a variable or similar. This shared source often cannot be accessed at the same time, so a construct is needed to ensure that only one thread is using that resource at a time.
The concept is called "mutual exclu... | null | CC BY-SA 4.0 | null | 2008-08-29T16:04:47.797 | 2019-08-03T11:44:22.950 | 2019-08-03T11:44:22.950 | 2,202,101 | 2,973 | null |
34,546 | 2 | null | 34,512 | 11 | null | A deadlock happens when a thread is waiting for something that never occurs.
Typically, it happens when a thread is waiting on a mutex or semaphore that was never released by the previous owner.
It also frequently happens when you have a situation involving two threads and two locks like this:
```
Thread 1 ... | null | CC BY-SA 2.5 | null | 2008-08-29T16:04:43.600 | 2008-08-29T16:16:50.293 | 2008-08-29T16:16:50.310 | 2,284 | 2,284 | null |
34,561 | 2 | null | 34,399 | 3 | null | Keep them display blocked, give them a width and float left.
That will make them sit by side, which is like inline, and should maintain the list style.
| null | CC BY-SA 2.5 | null | 2008-08-29T16:07:56.963 | 2008-08-29T16:07:56.963 | null | null | 3,193 | null |
34,541 | 2 | null | 34,505 | 30 | null | > Rules 1 & 3 are contradictory to me.
To a certain extent, they are. The reason is simple: if an object is stored in a hash table and, by changing its value, you change its hash then the hash table has lost the value and you can't find it again by querying the hash table. It is important that while objects are stored... | null | CC BY-SA 2.5 | null | 2008-08-29T16:03:42.247 | 2008-08-29T16:03:42.247 | null | null | 1,968 | null |
34,560 | 2 | null | 34,519 | 18 | null | @Craig:
> A semaphore is a way to lock a
resource so that it is guaranteed that
while a piece of code is executed,
only this piece of code has access to
that resource. This keeps two threads
from concurrently accesing a resource,
which can cause problems.
This is not restricted to only one thread. A semap... | null | CC BY-SA 2.5 | null | 2008-08-29T16:07:55.183 | 2008-08-29T16:07:55.183 | null | null | 2,973 | null |
34,562 | 2 | null | 34,510 | 42 | null | A race condition is a situation on concurrent programming where two concurrent threads or processes compete for a resource and the resulting final state depends on who gets the resource first.
| null | CC BY-SA 4.0 | null | 2008-08-29T16:07:57.913 | 2019-02-09T17:35:34.530 | 2019-02-09T17:35:34.530 | 2,695 | 2,695 | null |
34,558 | 2 | null | 34,524 | 2,791 | null | When I am having a big heated discussion at work, I use a rubber chicken which I keep in my desk for just such occasions. The person holding the chicken is the only person who is allowed to talk. If you don't hold the chicken you cannot speak. You can only indicate that you want the chicken and wait until you get it... | null | CC BY-SA 3.0 | null | 2008-08-29T16:07:15.387 | 2016-06-04T21:21:30.507 | 2016-06-04T21:21:30.507 | 308,315 | 274 | null |
34,565 | 1 | null | null | 75 | 63,146 | Additionally, how can I format it as a string padded with zeros?
| How do I generate a random 10 digit number in ruby? | CC BY-SA 2.5 | 0 | 2008-08-29T16:08:47.990 | 2021-04-24T20:04:30.013 | 2008-10-06T15:31:34.123 | 1,599 | 3,624 | [
"ruby",
"random"
] |
34,551 | 2 | null | 34,524 | 112 | null | ual clusion. [Here's the Wikipedia entry on it.](https://en.wikipedia.org/wiki/Mutual_exclusion)
The point of a mutex is to synchronize two threads. When you have two threads attempting to access a single resource, the general pattern is to have the first block of code attempting access to set the mutex before entering... | null | CC BY-SA 4.0 | null | 2008-08-29T16:05:38.747 | 2020-10-16T00:51:34.860 | 2020-10-16T00:51:34.860 | 1,402,846 | 1,975,282 | null |
34,550 | 2 | null | 34,510 | 1,600 | null | A race condition occurs when two or more threads can access shared data and they try to change it at the same time. Because the thread scheduling algorithm can swap between threads at any time, you don't know the order in which the threads will attempt to access the shared data. Therefore, the result of the change in d... | null | CC BY-SA 3.0 | null | 2008-08-29T16:05:23.100 | 2015-04-07T11:03:02.043 | 2015-04-07T11:03:02.043 | 3,001,736 | 142 | null |
34,556 | 2 | null | 34,524 | 250 | null | A Mutex is a ually clusive flag. It acts as a gate keeper to a section of code allowing one thread in and blocking access to all others. This ensures that the code being controlled will only be hit by a single thread at a time. Just be sure to release the mutex when you are done. :)
| null | CC BY-SA 4.0 | null | 2008-08-29T16:06:26.857 | 2022-03-01T10:13:09.480 | 2022-03-01T10:13:09.480 | 17,762,883 | 2,894 | null |
34,573 | 2 | null | 34,505 | 4 | null | Rules 1 & 3 aren't really a contradiction.
For a reference type the hash code is derived from a reference to the object - change an object's property and the reference is the same.
For value types the hash code is derived from the value, change a property of a value type and you get a completely new instance of the v... | null | CC BY-SA 2.5 | null | 2008-08-29T16:11:24.240 | 2008-08-29T16:11:24.240 | null | null | 905 | null |
34,571 | 1 | 34,658 | null | 3,152 | 1,182,082 | How do I use JUnit to test a class that has internal private methods, fields or nested classes?
It seems bad to change the access modifier for a method just to be able to run a test.
| How do I test a class that has private methods, fields or inner classes? | CC BY-SA 3.0 | 0 | 2008-08-29T16:11:09.933 | 2023-01-06T21:41:53.200 | 2021-10-19T20:41:15.027 | 6,296,561 | 3,098 | [
"java",
"unit-testing",
"junit",
"tdd"
] |
34,564 | 2 | null | 34,536 | 0 | null | The only thing that's wrong with this code (at least to me) is that you're not using a loop to process all elements. Other than that, why not to it like that?
And with loop, I mean grabbing the container element via a JQuery and iterating over all child elements – basically a one-liner.
| null | CC BY-SA 2.5 | null | 2008-08-29T16:08:41.047 | 2008-08-29T16:08:41.047 | null | null | 1,968 | null |
34,567 | 2 | null | 34,398 | 0 | null | > I guess I could create separate fields, then have a view that sort of coalesces them into a single logical column. Any opinions on that?
It depends on the source of the data. If you are getting the data from users (or some other system) in some free-form manner and don't really care what type of data it is, then th... | null | CC BY-SA 2.5 | null | 2008-08-29T16:09:59.127 | 2008-08-29T16:09:59.127 | null | null | 1,314 | null |
34,579 | 1 | null | null | 4 | 3,085 | I've recently been working with a MySQL database, and using MySQL workbench to design the Database.
When I use the export to SQL function, so I can actually get the layout in to the Database, I get:
> "Error 1005: Cannot create table"
This appears to be related to Foreign Keys in the create table statement.
Does an... | MySQL "Error 1005" when adding tables | CC BY-SA 3.0 | 0 | 2008-08-29T16:12:31.273 | 2015-05-07T15:40:03.677 | 2015-05-07T15:40:03.677 | 812,149 | 655 | [
"mysql",
"mysql-workbench",
"mysql-error-1005"
] |
34,578 | 2 | null | 34,510 | 20 | null | Race conditions occur in multi-threaded applications or multi-process systems. A race condition, at its most basic, is anything that makes the assumption that two things not in the same thread or process will happen in a particular order, without taking steps to ensure that they do. This happens commonly when two thr... | null | CC BY-SA 2.5 | null | 2008-08-29T16:12:09.120 | 2008-08-29T16:12:09.120 | null | null | 3,575 | null |
34,574 | 2 | null | 34,524 | 29 | null | In C#, the common mutex used is the [Monitor](http://en.wikipedia.org/wiki/Monitor_(synchronization)). The type is '[System.Threading.Monitor](http://msdn.microsoft.com/en-us/library/system.threading.monitor.aspx)'. It may also be used implicitly via the '[lock(Object)](http://msdn.microsoft.com/en-us/library/c5kehkcz(... | null | CC BY-SA 3.0 | null | 2008-08-29T16:11:28.077 | 2015-04-08T02:07:45.483 | 2015-04-08T02:07:45.483 | 2,891,664 | 3,619 | null |
34,586 | 2 | null | 34,571 | 807 | null | The best way to test a private method is via another public method. If this cannot be done, then one of the following conditions is true:
1. The private method is dead code
2. There is a design smell near the class that you are testing
3. The method that you are trying to test should not be private
| null | CC BY-SA 2.5 | null | 2008-08-29T16:14:19.943 | 2008-08-29T16:14:19.943 | null | null | 2,822 | null |
34,582 | 2 | null | 34,565 | 95 | null | To generate the number call rand with the result of the expression "10 to the power of 10"
```
rand(10 ** 10)
```
To pad the number with zeros you can use the string format operator
```
'%010d' % rand(10 ** 10)
```
or the `rjust` method of string
```
rand(10 ** 10).to_s.rjust(10,'0')
```
| null | CC BY-SA 2.5 | null | 2008-08-29T16:13:42.050 | 2008-08-29T16:13:42.050 | null | null | 3,624 | null |
34,540 | 2 | null | 33,923 | 173 | null | This excerpt from the book shows [how to make a proper tail recursion](http://www.lua.org/pil/6.3.html) (in Lua, but should apply to Lisp too) and why it's better.
> A [tail recursion] is a kind of goto dressed
as a call. A tail call happens when a
function calls another as its last
action, so it has nothing e... | null | CC BY-SA 3.0 | null | 2008-08-29T16:03:30.793 | 2016-02-25T21:26:20.097 | 2016-02-25T21:26:20.097 | 2,359,271 | 3,485 | null |
34,590 | 2 | null | 34,571 | 151 | null | Generally a unit test is intended to exercise the public interface of a class or unit. Therefore, private methods are implementation detail that you would not expect to test explicitly.
| null | CC BY-SA 3.0 | null | 2008-08-29T16:14:54.637 | 2012-12-29T09:52:20.260 | 2012-12-29T09:52:20.260 | 63,550 | 3,305 | null |
34,583 | 2 | null | 33,768 | 8 | null | There's no need to use `mxmlc` on the command line just to be able to add compiler flags. Right click your project in the Flex Navigator, select Properties and then Flex Compiler in the dialog that appears. There you can add any extra compiler flags.
Not sure that there's very much to do though, more code means more ... | null | CC BY-SA 2.5 | null | 2008-08-29T16:13:46.387 | 2008-08-29T16:20:03.830 | 2008-08-29T16:20:03.830 | 1,109 | 1,109 | null |
34,581 | 1 | 34,587 | null | 7 | 21,019 | I expected the two `span` tags in the following sample to display next to each other, instead they display one below the other. If I set the `width` of the class `span`.right to 49% they display next to each other. I am not able to figure out why the right span is pushed down like the right span has some invisible `pad... | inline-block on span | CC BY-SA 4.0 | null | 2008-08-29T16:13:11.880 | 2020-08-12T21:52:01.783 | 2020-08-12T21:52:01.783 | 9,154,188 | 3,635 | [
"html",
"css",
"css-float",
"internet-explorer-6"
] |
34,589 | 2 | null | 29,144 | 0 | null | I definitely prefer the merge methodology.
I've used Visual Sourcesafe (hopefully never again), CVS, subversion and bzr. Visual sourcesafe enforces the "checkout before editing" methodology and can be painful. CVS and subversion haven't been great at accepting merges historically, though I hear subversion 1.5 has im... | null | CC BY-SA 2.5 | null | 2008-08-29T16:14:39.410 | 2008-08-29T16:14:39.410 | null | null | 3,189 | null |
34,588 | 1 | 34,645 | null | 212 | 548,880 | When running my application I sometimes get an error about `too many files open`.
Running `ulimit -a` reports that the limit is 1024. How do I increase the limit above 1024?
`ulimit -n 2048` results in a permission error.
| How do I change the number of open files limit in Linux? | CC BY-SA 3.0 | 0 | 2008-08-29T16:14:25.417 | 2017-06-26T06:29:14.403 | 2012-04-25T23:00:18.420 | 1,332,690 | 3,535 | [
"linux"
] |
34,587 | 2 | null | 34,581 | 3 | null | ```
float: left;
```
Try adding that to span.left
It will cause it to float to the left (as suggested by the syntax).
---
I am not a CSS expert by any means so please don't take this as unarguable fact but I find that when something is floated, it makes no difference to the vertical position of things below it.... | null | CC BY-SA 3.0 | null | 2008-08-29T16:14:25.247 | 2011-11-02T12:04:42.573 | 2011-11-02T12:04:42.573 | 1,288 | 1,384,652 | null |
34,594 | 2 | null | 34,571 | 68 | null | The private methods are called by a public method, so the inputs to your public methods should also test private methods that are called by those public methods. When a public method fails, then that could be a failure in the private method.
| null | CC BY-SA 2.5 | null | 2008-08-29T16:15:30.127 | 2008-08-29T16:15:30.127 | null | null | 572 | null |
34,599 | 2 | null | 29,168 | 3 | null | You can have two git repositories (client and server) and add them to a "super-project" (app). In this "super-project" you can add the two repositories as submodules (check [this tutorial](https://git.wiki.kernel.org/articles/g/i/t/GitSubmoduleTutorial_c489.html)).
Another possible solution (a bit more dirty) is to ha... | null | CC BY-SA 3.0 | null | 2008-08-29T16:16:23.573 | 2011-11-13T15:17:25.987 | 2011-11-13T15:17:25.987 | 28,451 | 161 | null |
34,602 | 2 | null | 33,814 | 0 | null | If you've gotta stick to your current method of parsing, and it's a regex, you can use the [multi-line flag](http://us3.php.net/manual/en/reference.pcre.pattern.modifiers.php) "m" to span across multiple lines.
| null | CC BY-SA 2.5 | null | 2008-08-29T16:18:16.423 | 2008-08-29T16:18:16.423 | null | null | 1,902,010 | null |
34,598 | 2 | null | 34,571 | 238 | null | From this article: [Testing Private Methods with JUnit and SuiteRunner](http://www.artima.com/suiterunner/private.html) (Bill Venners), you basically have 4 options:
>
1. Don't test private methods.
2. Give the methods package access.
3. Use a nested test class.
4. Use reflection.
| null | CC BY-SA 4.0 | null | 2008-08-29T16:16:20.047 | 2021-04-24T21:04:52.087 | 2021-04-24T21:04:52.087 | 1,080,125 | 2,697 | null |
34,595 | 1 | 746,727 | null | 147 | 181,690 | What is a good Hash function? I saw a lot of hash function and applications in my data structures courses in college, but I mostly got that it's pretty hard to make a good hash function. As a rule of thumb to avoid collisions my professor said that:
```
function Hash(key)
return key mod PrimeNumber
end
```
(mod is... | What is a good Hash Function? | CC BY-SA 3.0 | 0 | 2008-08-29T16:15:37.257 | 2022-10-11T08:49:41.773 | 2012-09-02T12:05:26.043 | 193,892 | 3,485 | [
"algorithm",
"language-agnostic",
"hash"
] |
34,611 | 1 | 35,741 | null | 13 | 6,123 | What are some toolkits for developing 2D games in Python? An option that I have heard of is Pygame, but is there anything that has more range to do more things? What are the good and bad parts about the modules?
| Toolkit Options for 2D Python Game Programming | CC BY-SA 3.0 | 0 | 2008-08-29T16:20:43.467 | 2013-12-17T22:44:49.797 | 2013-12-17T22:44:49.797 | 2,253,573 | 1,447 | [
"python-3.x",
"pygame",
"libraries",
"toolkit",
"2d-games"
] |
34,603 | 2 | null | 34,512 | 36 | null | Deadlocks will only occur when you have two or more locks that can be aquired at the same time and they are grabbed in different order.
Ways to avoid having deadlocks are:
- - -
| null | CC BY-SA 2.5 | null | 2008-08-29T16:19:17.077 | 2008-08-29T16:19:17.077 | null | null | 2,973 | null |
34,606 | 2 | null | 34,595 | 4 | null | I'd say that the main rule of thumb is not to roll your own. Try to use something that has been thoroughly tested, e.g., SHA-1 or something along those lines.
| null | CC BY-SA 2.5 | null | 2008-08-29T16:20:05.467 | 2008-08-29T16:20:05.467 | null | null | 2,964 | null |
34,625 | 2 | null | 34,486 | 1 | null | jQuery is probably one of the lightest popular libraries out there.
| null | CC BY-SA 2.5 | null | 2008-08-29T16:22:27.927 | 2008-08-29T16:22:27.927 | null | null | 1,902,010 | null |
34,621 | 2 | null | 34,510 | 46 | null | A sort-of-canonical definition is "." In the situation the "reader" thread may get the old value or the new value, depending on which thread "wins the race." This is not always a bug—in fact, some really hairy low-level algorithms do this on purpose—but it should generally be avoided. @Steve Gury give's a good example ... | null | CC BY-SA 2.5 | null | 2008-08-29T16:21:41.577 | 2008-08-29T16:21:41.577 | null | null | 1,412 | null |
34,566 | 2 | null | 34,505 | 5 | null | Not sure what MSDN documentation you are referring to. Looking at the current documentation on Object.GetHashCode ([http://msdn.microsoft.com/en-us/library/system.object.gethashcode.aspx](http://msdn.microsoft.com/en-us/library/system.object.gethashcode.aspx)) provides the following "rules":
- If two objects compare a... | null | CC BY-SA 2.5 | null | 2008-08-29T16:09:29.690 | 2008-08-29T16:09:29.690 | null | null | 1,559 | null |
34,630 | 2 | null | 34,571 | 18 | null | I tend not to test private methods. There lies madness. Personally, I believe you should only test your publicly exposed interfaces (and that includes protected and internal methods).
| null | CC BY-SA 2.5 | null | 2008-08-29T16:23:45.893 | 2008-08-29T16:23:45.893 | null | null | 1,931 | null |
34,617 | 2 | null | 34,536 | 5 | null | Here's the jQuery version:
```
<script type="text/javascript" src="http://jqueryjs.googlecode.com/files/jquery-1.2.6.min.js"></script>
<script type="text/javascript">
$(function () {
$("#switches li").mouseover(function () {
var $this = $(this);
$("#slides div").hide();
$("#slide" + $this.a... | null | CC BY-SA 2.5 | null | 2008-08-29T16:21:23.857 | 2008-08-29T16:27:07.633 | 2008-08-29T16:27:07.633 | 1,414 | 1,414 | null |
34,614 | 2 | null | 33,814 | 1 | null | Perhaps for future projects I'll use a parsing library, but that's kind of aside from the question at hand. This is my current solution. `rstrpos` is strpos, but from the reverse direction. Example use:
```
for($i=0; $i<count($lines); $i++)
{
$line = handle_mulitline_tags(&$i, $line, $lines);
}
```
And here's th... | null | CC BY-SA 2.5 | null | 2008-08-29T16:20:57.163 | 2008-08-29T16:20:57.163 | null | null | 1,569 | null |
34,634 | 2 | null | 33,971 | 0 | null | And what's funny (and frustrating!) is that the Microsoft apps (e.g. Entourage) use the standards.
I develop on WinXP during the day but have an iMac at home, so it's confusing enough trying to switch modes between work and home. But then I have to remember if I'm writing an e-mail in Entourage, I need to revert ba... | null | CC BY-SA 2.5 | null | 2008-08-29T16:25:57.323 | 2008-08-29T16:25:57.323 | null | null | 2,773 | null |
34,635 | 1 | 34,651 | null | 8 | 6,077 | I think the file that is produced is an .asm file, any idea how to produce this in Visual Studio when you do a build?
| How do I get the assembler output from a C file in VS2005 | CC BY-SA 2.5 | 0 | 2008-08-29T16:25:58.633 | 2012-05-02T04:10:47.983 | 2012-05-02T04:10:47.983 | 192,221 | 1,952 | [
"c",
"visual-studio",
"assembly"
] |
34,629 | 2 | null | 34,463 | 0 | null | Have you seen this:
[http://www.itefix.no/i2/taxonomy/term/39](http://www.itefix.no/i2/taxonomy/term/39)
I have used cwrsync without any problem (and with the much of the usual cygwin misery), but I haven't had any need for unicode filenames, so I've not seen that problem.
I don't really know why there isn't a nativ... | null | CC BY-SA 2.5 | null | 2008-08-29T16:23:18.797 | 2008-08-29T16:23:18.797 | null | null | 987 | null |
34,633 | 2 | null | 32,607 | 5 | null | Ahh, just found this [CodePlex Article on using TFPT.exe](http://www.codeplex.com/VSTSGuidance/Wiki/View.aspx?title=Use%20Team%20Foundation%20Power%20Tools%20to%20Rollback%20a%20Change&referringTitle=Source%20Control%20Guidelines) (power tool) to rollback a changeset.
Hope this helps you out.
| null | CC BY-SA 2.5 | null | 2008-08-29T16:25:03.037 | 2008-08-29T16:25:03.037 | null | null | 3,381 | null |
34,626 | 2 | null | 34,398 | 0 | null | You might consider using two columns, one "string" and one "numeric" (whatever variants of those are appropriate) with the "string" column NOT NULL and the "numeric" column allowing NULL values. When inserting a value, always populate the "string" column indpendent of the type, however if the value is numeric, ALSO sto... | null | CC BY-SA 2.5 | null | 2008-08-29T16:22:43.197 | 2008-08-29T16:22:43.197 | null | null | null | null |
34,639 | 2 | null | 34,611 | 0 | null | I've only heard people talk about pygame. It has tons of followers & plenty of functionality.
Recently I saw [this book](https://rads.stackoverflow.com/amzn/click/com/1590598725) at barnes & noble which I might check out one day. It looked good.
| null | CC BY-SA 2.5 | null | 2008-08-29T16:27:49.347 | 2008-08-29T16:27:49.347 | null | null | 3,381 | null |
34,642 | 2 | null | 34,579 | 1 | null | I ran into this situation recently when I attempted (in InnoDB tables) to make a foreign key reference to a column that had a different data type.
[MySQL 5.1 Documentation](http://dev.mysql.com/doc/refman/5.1/en/innodb-foreign-key-constraints.html)
| null | CC BY-SA 2.5 | null | 2008-08-29T16:29:34.977 | 2008-08-29T16:29:34.977 | null | null | 3,449 | null |
34,640 | 2 | null | 34,611 | 3 | null | I think pygame is the standard for game development in Python, I don't know of any others. A book you may be interested in is [Game Programming with Python, Lua, and Ruby](https://rads.stackoverflow.com/amzn/click/com/1592000770). Not only does it cover Python (and, I believe, the pygame module), but it also gives yo... | null | CC BY-SA 2.5 | null | 2008-08-29T16:28:33.323 | 2008-08-29T16:28:33.323 | null | null | 271 | null |
34,623 | 1 | 85,788 | null | 10 | 2,195 | Why would you do an automatic HTML post rather than a simple redirect?
Is this so developers can automatically generate a login form that posts directory to the remote server when the OpenID is known?
eg.
1. User is not logged in and visits your login page.
2. You detect the user's openID from a cookie.
3. Form is ... | Why is HTML form redirection used in OpenID 2? | CC BY-SA 2.5 | 0 | 2008-08-29T16:21:47.600 | 2013-02-04T07:15:56.813 | null | null | 2,108 | [
"openid",
"redirect",
"openid2"
] |
34,638 | 1 | 34,917 | null | 6 | 5,339 | The system I am currently working on requires some role-based security, which is well catered for in the Java EE stack. The system intends to be a framework for business domain experts to write their code on top of.
However, there is also a requirement for data `security`. That is, what information is visible to an en... | data 'security' with java and hibernate | CC BY-SA 3.0 | null | 2008-08-29T16:27:43.000 | 2014-11-30T10:17:39.750 | 2014-11-30T10:17:39.750 | 3,867,570 | 3,295 | [
"java",
"security",
"hibernate",
"jakarta-ee"
] |
34,641 | 2 | null | 32,338 | 2 | null | The [IntelliJ](http://www.jetbrains.com/idea/index.html) IDE (Java, Scala, Ruby,...) has a [Locate Duplicate...](http://www.jetbrains.com/idea/features/code_duplicate.html) tool. Usefull indeed !
| null | CC BY-SA 2.5 | null | 2008-08-29T16:29:28.160 | 2008-08-29T16:29:28.160 | null | null | 2,797 | null |