text stringlengths 0 30.5k | title stringclasses 1
value | embeddings listlengths 768 768 |
|---|---|---|
+------+
| p |
+------+
| 0.5 |
+------+
1 row in set (0.00 sec)
```
However, changing the p-value that I'm asking for:
```
SELECT p FROM rParam | [
-0.49072733521461487,
-0.02132559008896351,
0.6430762410163879,
-0.2862100899219513,
-0.03544049710035324,
0.48914003372192383,
0.1725926697254181,
-0.621149480342865,
-0.20683547854423523,
-0.3220716714859009,
-0.2459326535463333,
0.3656845688819885,
-0.2796115577220917,
-0.11059966683387... | |
WHERE p=0.6 GROUP BY p;
Empty set (0.00 sec)
```
but we can clearly see from the first output that there are rows for which p=0.6? This is a problem for most of the p-values - why does mySQL return the empty set?
This sounds like an rounding error. Floating point numbers cannot always be represented exactly in binary form. Try applying some epsilon:
```
SELECT DISTINCT p
FROM rParam
WHERE ABS(p - 0.6) < 0.00001
```
If you want exact fractional numbers, use `DECIMAL` instead of `FLOAT` as column data type.
ps. Probably better to use `SELECT DISTINCT` | [
-0.5107051730155945,
-0.06316760927438736,
0.27787938714027405,
-0.033356115221977234,
-0.27414989471435547,
0.32761383056640625,
-0.020147819072008133,
-0.46609222888946533,
-0.3005222678184509,
-0.3777486979961395,
-0.1692562997341156,
0.20591424405574799,
-0.09863359481096268,
0.0298385... | |
instead of a `GROUP BY`. | [
-0.0009278298821300268,
0.04863547906279564,
-0.02236812748014927,
-0.23483550548553467,
-0.40831440687179565,
-0.06865623593330383,
0.3067064881324768,
-0.22856730222702026,
-0.46185097098350525,
-0.26952841877937317,
-0.589985191822052,
-0.15006199479103088,
-0.2944160997867584,
0.159236... | |
I have some fortran code compiled with intel fortran compiler ifort. When I do a profile test with gprof, I get that most of the time is used in IO operations, I think finding the end of the files, but I can no find any more documentation on this:
```
index % time self children called name | [
0.2158181220293045,
0.4765830636024475,
-0.10336782038211823,
-0.039912622421979904,
0.1490020751953125,
0.012436283752322197,
0.1533249318599701,
0.1960422843694687,
-0.02593049965798855,
-0.6861405968666077,
0.4092472791671753,
0.49820971488952637,
0.001263212296180427,
0.367145091295242... | |
<spontaneous>
[1] 20.6 0.07 0.00 _IO_wfile_seekoff [1]
-----------------------------------------------
<spontaneous>
[2] 20.6 | [
0.2684355676174164,
-0.32573410868644714,
0.2943071126937866,
-0.04081330448389053,
-0.3434053063392639,
-0.02015560306608677,
0.3434757590293884,
-0.47612735629081726,
0.03442078456282616,
-0.5120371580123901,
-0.04060469940304756,
0.25755706429481506,
-0.2962879240512848,
0.0276175942271... | |
0.07 0.00 sforcepf_ [2]
-----------------------------------------------
<spontaneous>
[3] 20.6 0.02 0.05 | [
0.38401728868484497,
-0.0329909473657608,
0.4376860558986664,
-0.020817846059799194,
-0.4138995110988617,
-0.25716105103492737,
0.4160054922103882,
-0.2799837589263916,
0.07826008647680283,
-0.30330967903137207,
-0.1979459673166275,
0.2664742171764374,
-0.20923097431659698,
-0.062490791082... | |
_IO_wfile_underflow [3]
0.01 0.04 258716/258717 strncmp [4]
-----------------------------------------------
0.00 0.00 1/258717 _IO_wdefault_doallocate [15]
0.01 0.04 258716/258717 _IO_wfile_underflow [3]
[4] | [
-0.4537852704524994,
0.27319493889808655,
0.6342316269874573,
-0.022462308406829834,
-0.11142609268426895,
0.15741194784641266,
0.3149126470088959,
-0.41819489002227783,
-0.12064392864704132,
-0.3977961838245392,
-0.14155365526676178,
0.48892125487327576,
-0.16658468544483185,
0.2321793287... | |
14.7 0.01 0.04 258717 strncmp [4]
0.04 0.00 3104592/3109256 strerror_r [5]
-----------------------------------------------
0.00 0.00 4664/3109256 __strcmp_sse42 [14]
0.04 0.00 | [
-0.5661764144897461,
0.2754105031490326,
0.819453239440918,
0.09698701649904251,
-0.09316316246986389,
0.11629851162433624,
0.3676031231880188,
-0.2995457351207733,
-0.5449795722961426,
-0.5067858099937439,
-0.2587180733680725,
0.6019377112388611,
-0.10992473363876343,
0.3121998608112335,
... | |
3104592/3109256 strncmp [4]
[5] 11.8 0.04 0.00 3109256 strerror_r [5]
-----------------------------------------------
```
So, the question would be, is this IO specific to Linux, or to ifort, or to fortran? I am trying to optimize this code, and have found no useful info about this terms in google.
You write Fortran statements. The Intel Fortran compiler translates those statements into assembler including calls to system functions. For example, `strncmp` is an ISO C standard function to compare parts of strings. So it looks like | [
0.049178168177604675,
0.28513067960739136,
0.324919193983078,
-0.005593132693320513,
-0.28096306324005127,
-0.11993257701396942,
0.06281035393476486,
-0.12773847579956055,
-0.09739313274621964,
-0.3948969542980194,
-0.027491962537169456,
0.6131460070610046,
-0.32350507378578186,
-0.0831002... | |
you are writing Fortran statements to compare strings, and the Intel Fortran compiler is calling an existing function to implement the comparisons. Some of those system functions will themselves be implemented (in part) by calls to even more fundamental functions provided on your platform.
`gprof` is showing you the calls to the functions that it finds referred to in the products of your compilation. Most of what you see is specific to Linux I/O -- on a Windows machine the I/O would use similar functions with different names. It's possible that some of what you see is specific to the Intel | [
0.27882739901542664,
0.36679360270500183,
0.049421537667512894,
0.018234655261039734,
-0.12948057055473328,
-0.13945667445659637,
-0.0811462327837944,
-0.15763355791568756,
-0.061049655079841614,
-0.38326677680015564,
-0.2314586341381073,
0.6119166016578674,
-0.44832491874694824,
-0.108048... | |
compilers, that all Intel compilers use the same (Intel-created) function for some operation and that that function uses platform-specific lower-level functions.
Unless you are prepared to rewrite these low-level functions, and take the risk that you will screw them up for other programs using the same functions, then just about the only optimisation you can make is to call them less often. For example, if you have reason to think that reading past the end of a file is an expensive I/O operation, and if your program strategy is to read a file until you read past the end and then | [
0.5040212869644165,
0.29489776492118835,
-0.2322062999010086,
0.28439855575561523,
-0.01782204397022724,
-0.12013482302427292,
0.3605135381221771,
-0.09412522614002228,
-0.061087701469659805,
-0.44212833046913147,
-0.1283162385225296,
0.5610148906707764,
-0.3777141571044922,
-0.26680681109... | |
deal with the error that arises, then you may want to implement a superior program strategy. That will be easier than re-writing the low-level I/O routines which deal with the consequences of your strategy. | [
0.1496378481388092,
0.2579967975616455,
-0.0831894725561142,
0.10523790866136551,
0.17584280669689178,
-0.03512408956885338,
0.30936989188194275,
-0.14001096785068512,
0.08539891988039017,
-0.6761454343795776,
-0.15109111368656158,
0.8526938557624817,
0.048051971942186356,
-0.3639019131660... | |
I have read all possible answer [here](https://stackoverflow.com/questions/4533317/netbeans-with-glassfish-have-no-suitable-driver-found-for-mysqljdbc) and [here](https://stackoverflow.com/questions/9622105/java-sql-sqlexception-no-suitable-driver-found-for-netbeans) and [here](https://stackoverflow.com/questions/2839321/java-connectivity-with-mysql/2840358#2840358). I believe I have a problem somewhere else and it may useful to others also.
I have a Java Servlet and it was executing well in eclipse IDE but later I shifted the project to Netbeans. I imported MySQL JDBC driver in Libraries and using the code below for connection
```
connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/bolsms", "root", "@#$5869@#$");
```
but I am getting this error **No suitable driver found for jdbc:mysql://localhost:3306/bolsms**
I looking for answer for two days and community will appreciate that I am not repeating the question.
**Edit 1:**
When you | [
0.04361448809504509,
0.22624137997627258,
0.19624556601047516,
-0.15690328180789948,
-0.21836751699447632,
-0.018702233210206032,
0.4015195071697235,
-0.12163664400577545,
-0.23012426495552063,
-0.6253489255905151,
0.054517440497875214,
0.5729244947433472,
-0.24372878670692444,
0.213805526... | |
use it in Tomcat you have to explicitly load jdbc driver. I experienced the same error in a servlet in Tomcat. And adding `Class.forName("com.mysql.jdbc.Driver");` solve it.
The other thing I think, is to put the jar file in your `WEB-INF/lib`, then in your project properties, in Libraries, add the JAR you store in `WEB-INF/lib`.
To create the `lib` directory, right click on `WEB-INF` and choose `New -> Folder...`
If you don't see `Folder` choose `Other` then in the new windows choose `Other` again and `Folder`.
The Tomcat / JDBC issue is referenced [here](http://issues.apache.org/bugzilla/show_bug.cgi?id=48214) for more information. | [
-0.1639498472213745,
0.34572312235832214,
0.0038417507894337177,
-0.21865761280059814,
-0.17033317685127258,
-0.11067821085453033,
0.23124483227729797,
-0.05108794569969177,
-0.20523987710475922,
-0.5052339434623718,
0.21990887820720673,
0.7182317972183228,
-0.47708234190940857,
0.04340730... | |
I have a very large std::vector of std::vectors containing a fixed number of unsigned integers.
All vectors of uints are sorted ascending.
My current way to eliminate duplicate vectors is
```
unsigned int i = 0;
while ( i < new_combs.size() )
{
unsigned int j = i + 1;
while ( j < new_combs.size() )
{
unsigned int k = 0;
while ( k < new_combs.at(i).size() && new_combs.at(i).at(k) == new_combs.at(j).at(k) )
++k;
if ( k == new_combs.at(j).size() ) | [
-0.2984618544578552,
0.12096481770277023,
0.7250754237174988,
-0.09343387186527252,
0.0005561822326853871,
0.30806782841682434,
0.47213858366012573,
-0.47943970561027527,
-0.2614282965660095,
-0.8090221285820007,
0.0983397513628006,
0.3837658166885376,
-0.35211148858070374,
0.5500024557113... | |
new_combs.erase(new_combs.begin() + j);
else
++j;
}
++i;
}
```
here, new\_combs is a vector containing vectors as mentioned above.
Is there a more efficient way to eliminate duplicates if the vector of vectors is unsorted?
A shorter way would be using `<algorithm>`:
```
std::sort(new_combs.begin(), new_combs.end());
new_combs.erase(std::unique(new_combs.begin(), new_combs.end()), new_combs.end());
```
Unless you specifically need a `std::vector`, you can use `std::set` to avoid duplicates. | [
-0.0809565931558609,
0.007851563394069672,
0.4627046585083008,
-0.13701647520065308,
-0.09428256750106812,
0.003172814380377531,
0.3008747696876526,
-0.46780306100845337,
-0.5275659561157227,
-0.9768479466438293,
-0.1784994751214981,
0.44296956062316895,
-0.6395708322525024,
0.319409996271... | |
I have a `Dynamic Web Project` in Eclipse which has a dependency to another Java project in my workspace. When running the web project in the build-in Tomcat server, I've added the project dependency to the class path in the *run configuration*. I would like to create a WAR for deploying the web project on an external server. The dependency Java project is added to the *Java Build path* in Eclipse, but when I export an WAR-file the library is not included. The Java project is also selected in the *Order and Export*. How can I create a WAR with | [
0.45101651549339294,
0.24364107847213745,
-0.19692280888557434,
-0.09863682091236115,
-0.49697160720825195,
0.16673608124256134,
0.18435175716876984,
-0.08793402463197708,
-0.25190746784210205,
-0.5166022777557373,
0.2190229892730713,
0.9358822107315063,
-0.5777434706687927,
0.192036092281... | |
where my dependencies are included?
[Maven multimodule project](http://maven.apache.org/plugins/maven-eclipse-plugin/reactor.html) is well suited here,
If you don't want to go for it then just the build the dependency into (.jar) add it to runtime dependency of web project(/WEB-INF/lib) and build up the WAR | [
0.4843776822090149,
0.09562777727842331,
0.05281998589634895,
-0.06865295767784119,
-0.18888697028160095,
-0.2870440185070038,
0.19677230715751648,
-0.3832673728466034,
-0.07112719863653183,
-0.34202176332473755,
0.1690099686384201,
0.5601364970207214,
-0.012321163900196552,
0.141324460506... | |
On click of OK in jAlert nothing is triggered, even the dialog box doesn't close:
```
$(document).ready(function () {
$("#confirm_button").click(function () {
jAlert("Submitted", "Approval", function () {
//My code goes in here
});
});
});
```
I need to get the event on OK click, please help me out in this!
The HTML
```
<html>
<head>
<title>Demo</title>
<script src="jquery.js" charset="utf-8" type="text/javascript"></script>
<script src="jquery.alerts.js" | [
-0.06576181948184967,
0.052153538912534714,
0.567031741142273,
-0.12623673677444458,
0.017794234678149223,
-0.37698793411254883,
0.39018118381500244,
-0.2632681429386139,
-0.08133453130722046,
-0.5187911987304688,
-0.488331139087677,
0.626130223274231,
-0.36845219135284424,
0.1127981096506... | |
charset="utf-8" type="text/javascript"></script>
<link href="jquery.alerts.css" charset="utf-8" rel="stylesheet" type="text/css" media="screen" />
<script type="text/javascript">
$(document).ready(function () {
$("#confirm_button").click(function () {
jAlert("Submitted", "Approval", function () {
//
}); | [
0.27626147866249084,
-0.07509222626686096,
0.5637903809547424,
-0.12857557833194733,
0.24427048861980438,
-0.03308327868580818,
0.17397083342075348,
-0.497383713722229,
0.03412218764424324,
-0.4112030863761902,
-0.682966411113739,
0.5101437568664551,
-0.4551178812980652,
-0.002492602216079... | |
});
});
</script>
</head>
<body>
<form runat="server">
<asp:Button ID="btnAlert" runat="server" Text="Click"/>
</form>
<input id="confirm_button" type="button" value="Show Confirm" />
</body>
</html>
```
`jAlert` is supposed to be invoked like so:
```
$.jAlert(...)
```
Change that, and the code will work. [Fiddle](http://jsfiddle.net/LhLhM/). | [
0.2968519926071167,
-0.040330201387405396,
0.5721787810325623,
-0.2961121201515198,
0.24253103137016296,
-0.1654396504163742,
0.6341285705566406,
-0.5205861330032349,
-0.04243853688240051,
-0.44557657837867737,
-0.18442460894584656,
0.7259021401405334,
-0.2301594614982605,
-0.0373473353683... | |
I Want to know why the first statements works and why not second one in c++
```
char a[10]="iqbal"; // it works
a="iqbal"; // does not work
```
Strictly speaking, an array is not a pointer! ***And an array ( base address of the array ) cant be a modifiable lvalue***. ie it cannot appear on the left hand side of an assignment operator.Arrays decay into pointers only in certain circumstances. Read this [SO post](https://stackoverflow.com/questions/1461432/what-is-array-decaying) to learn when arrays decay into pointers. Here is one more [nice article](http://www.lysator.liu.se/c/c-faq/c-2.html) which explains the differences between arrays and pointers
Also read about lvalues and rvalues | [
0.33941707015037537,
0.1334727704524994,
0.20461776852607727,
-0.04319397360086441,
-0.1597733497619629,
0.07379032671451569,
0.04170800745487213,
-0.27185651659965515,
-0.21161334216594696,
-0.36415258049964905,
0.022822141647338867,
0.41074657440185547,
-0.3076545298099518,
0.26270481944... | |
[here](http://publib.boulder.ibm.com/infocenter/comphelp/v7v91/index.jsp?topic=/com.ibm.vacpp7a.doc/language/ref/clrc05lvalue.htm) so that you get an idea of things which cannot appear on the LHS of `=`
> char a[10]="iqbal"; // it works
In this case, internally what happens is
```
a[0] = 'i';
a[1] = 'q';
.
.
a[5] = '\0';
```
So everything is fine as `array[i]` is a modifiable lvalue.
> a="iqbal"; // does not work
Internally, this is roughly equivalent to
```
0x60000(Address of a, but is a simple number here ) = Address of "iqbal"
```
This is wrong as we cannot assign something to a number. | [
0.055628303438425064,
0.37775570154190063,
0.1810602843761444,
-0.2572692036628723,
0.048684146255254745,
-0.2055467814207077,
0.39943546056747437,
-0.36723440885543823,
-0.3701905310153961,
-0.4549371004104614,
-0.38111308217048645,
0.2890028953552246,
-0.4192771315574646,
0.3695612549781... | |
I trying submit a picture in a Iframe (fancybox), but if I close the iframe I don't get the Data on the server.
(this code are inside the frame)
```
<a class="button" id="finishButton" onclick="closeME()"><span>@PhotoPremier.Resources.Global.btnSubmit</span></a>
<script>
function closeME() {
if (ValidationToSubmit() == true) {
$('#FormToSubmit').submit();
}
}
$('#FormToSubmit').submit(function() {
event.preventDefault();
parent.$.fancybox.close();
});
</script>
```
Strictly speaking, an array is not a pointer! ***And an array ( base address of the array ) cant be a modifiable lvalue***. ie it cannot appear on the left hand side of an assignment operator.Arrays decay into | [
0.25589796900749207,
0.04550555720925331,
0.6491718292236328,
-0.2599795162677765,
0.01735595241189003,
0.19830821454524994,
0.5002516508102417,
-0.7103832364082336,
-0.021153150126338005,
-0.7254024147987366,
-0.2145489901304245,
0.08216754347085953,
-0.4972306489944458,
0.052767995744943... | |
pointers only in certain circumstances. Read this [SO post](https://stackoverflow.com/questions/1461432/what-is-array-decaying) to learn when arrays decay into pointers. Here is one more [nice article](http://www.lysator.liu.se/c/c-faq/c-2.html) which explains the differences between arrays and pointers
Also read about lvalues and rvalues [here](http://publib.boulder.ibm.com/infocenter/comphelp/v7v91/index.jsp?topic=/com.ibm.vacpp7a.doc/language/ref/clrc05lvalue.htm) so that you get an idea of things which cannot appear on the LHS of `=`
> char a[10]="iqbal"; // it works
In this case, internally what happens is
```
a[0] = 'i';
a[1] = 'q';
.
.
a[5] = '\0';
```
So everything is fine as `array[i]` is a modifiable lvalue.
> a="iqbal"; // does not work
Internally, this is roughly equivalent to
```
0x60000(Address of a, but is a simple number here | [
0.015046265907585621,
0.1349571943283081,
0.5007764101028442,
-0.0563872829079628,
-0.046068355441093445,
-0.020076526328921318,
0.11838008463382721,
-0.2985057234764099,
-0.5123249292373657,
-0.5748801827430725,
-0.2145748734474182,
0.27861541509628296,
-0.36642640829086304,
0.29165086150... | |
) = Address of "iqbal"
```
This is wrong as we cannot assign something to a number. | [
0.1548500955104828,
0.22086022794246674,
0.15434323251247406,
-0.24008755385875702,
-0.10482373833656311,
0.04861894249916077,
0.1536066234111786,
-0.43706050515174866,
0.046752311289310455,
-0.34883439540863037,
-0.4443522095680237,
0.007066694088280201,
-0.6705886125564575,
0.61720740795... | |
I am new to LINQ and sorry if my question have been asked
I have 2 classes
```
public class Person
{
int ID {get;set;}
string FirstName {get;set;}
string LastName {get;set;}
}
```
and
```
public class House
{
int ID {get;set;}
string Address {get;set;}
string ZipCode {get;set;}
int PersonId {get;set;}
}
```
I am saving the list of houses in a IEnumerable List
```
IEnumerable<House> ListHouses = GetAllHouses();
```
GetAllHouses return the list of houses from the database
I want to use Lamda select in LINQ in order to do the following
```
var st = ListHouses .Select(h | [
0.38980403542518616,
0.1766982078552246,
0.5887755751609802,
-0.24759411811828613,
0.16711533069610596,
0.08749799430370331,
0.19954250752925873,
-0.60182124376297,
-0.0978781133890152,
-0.8278946280479431,
-0.2478295862674713,
0.16557325422763824,
-0.2148904651403427,
0.2158384472131729,
... | |
=> new
{
id = h.ID,
Address= h.Address,
Zip= h.ZipCode ,
PersonFirstName = GetPersonByID(h.PersonId ).FirstName,
PersonLastname = GetPersonByID(h.PersonId ).lastname
});
```
Where GetPersonByID returns an object of Type `Person` that has the given ID. and then I take his first name and last name.
My question is this:
Instead of Getting the Person 2 times for the variables (personFirstName and PersonLastName) Is there a way I can get it one time and then used it. Something like
```
PersonForId = GetPersonByID(h.PersonId)
PersonFirstName = PersonLastName.FirstName,
PersonLastname = PersonLastName.lastname
```
I'm looking for something similar to Join | [
-0.2782514989376068,
-0.20421017706394196,
0.42972856760025024,
-0.060608766973018646,
0.02223833277821541,
0.16025027632713318,
0.20154431462287903,
-0.2662162184715271,
-0.12177864462137222,
-0.7654544115066528,
0.028114736080169678,
0.30738577246665955,
-0.03445741534233093,
0.358330339... | |
in SQL where you join a value from another table.
Thanks you very much for any help
You're extremely close! Using your code (and making all properties on House and Person public), here is a method using the LINQ Join method:
```
var st = GetAllHouses().Join(GetAllPersons(),
outerKey => outerKey.PersonId,
innerKey => innerKey.ID,
(house, person) => new
{
house.ID,
house.Address,
house.ZipCode,
PersonFirstName = person.FirstName, | [
0.12036913633346558,
0.2026357352733612,
0.21761897206306458,
-0.0979715883731842,
0.01802031323313713,
-0.06513190269470215,
0.2127234935760498,
-0.5296186804771423,
-0.1459100842475891,
-0.44573020935058594,
-0.14422449469566345,
0.2728964388370514,
-0.17965494096279144,
0.16780509054660... | |
PersonLastname = person.LastName
});
```
Note: I would recommend the GetAllPersons() and the GetAllHouses() methods return IQueryable rather than IEnumerable. Doing so will build the expression (including the join), which means LINQ-to-SQL (or Entities) will build a proper SQL statement with the JOIN included, instead of enumerating the collections and *then* joining.
Additional information on such can be found here: [Returning IEnumerable<T> vs. IQueryable<T>](https://stackoverflow.com/questions/2876616/returning-ienumerablet-vs-iqueryablet) | [
-0.2021855115890503,
0.147284135222435,
0.4912090301513672,
0.04975156486034393,
0.030305085703730583,
-0.08986884355545044,
0.16604875028133392,
-0.18218620121479034,
-0.03167512267827988,
-0.2974734902381897,
-0.4093215763568878,
0.5880072116851807,
-0.08861871063709259,
0.00227858289144... | |
I need to use NSPredicate to match two strings, case-insensitive, diacritic insensitive, **and whitespace-insensitive**.
The predicate would look something like this:
```
[NSPredicate predicateWithFormat:@"Key ==[cdw] %@", userInputKey];
```
The 'w' modifier is an invented one to express what I'd like to use.
I can't just trim the `userInputKey` because the data-source "Key" values might have whitespaces in them too (they need those whitespaces, I can't just trim them beforehand).
For example, given a `userInputKey` "abc" the predicate should match all of
```
{"abc", "a b c", " a B C "}
```
and so on. Given a `userInputKey`"a B C" the predicate should also | [
0.2594537138938904,
0.06634248048067093,
0.31188273429870605,
-0.13029265403747559,
-0.0001712621742626652,
0.18001140654087067,
0.10163284838199615,
-0.3540608286857605,
0.1523638516664505,
-0.8726235032081604,
-0.08907090127468109,
0.6220198273658752,
-0.32555484771728516,
0.096501715481... | |
match all the values in the set above.
This can't be so hard to do, can it?
How about defining something like this:
```
+ (NSPredicate *)myPredicateWithKey:(NSString *)userInputKey {
return [NSPredicate predicateWithBlock:^BOOL(NSString *evaluatedString, NSDictionary *bindings) {
// remove all whitespace from both strings
NSString *strippedString=[[evaluatedString componentsSeparatedByCharactersInSet:[NSCharacterSet whitespaceCharacterSet]] componentsJoinedByString:@""];
NSString *strippedKey=[[userInputKey componentsSeparatedByCharactersInSet:[NSCharacterSet whitespaceCharacterSet]] componentsJoinedByString:@""];
return [strippedString caseInsensitiveCompare:strippedKey]==NSOrderedSame;
}];
}
```
Then use it like this:
```
NSArray *testArray=[NSArray arrayWithObjects:@"abc", @"a bc", @"A B C", @"AB", @"a | [
0.13153702020645142,
0.11858023703098297,
0.2144048511981964,
-0.23383353650569916,
0.04368184506893158,
-0.024911697953939438,
0.38700878620147705,
-0.5722479224205017,
-0.1638539880514145,
-0.4142436683177948,
-0.1172226294875145,
0.4706249237060547,
-0.5021093487739563,
0.02802790701389... | |
B d", @"A bC", nil];
NSArray *filteredArray=[testArray filteredArrayUsingPredicate:[MyClass myPredicateWithKey:@"a B C"]];
NSLog(@"filteredArray: %@", filteredArray);
```
The result is:
```
2012-04-10 13:32:11.978 Untitled 2[49613:707] filteredArray: (
abc,
"a bc",
"A B C",
"A bC"
)
``` | [
-0.08212254196405411,
-0.19366461038589478,
0.13233143091201782,
-0.18878266215324402,
-0.03858434036374092,
0.06947346031665802,
0.38421630859375,
-0.37838199734687805,
-0.31231820583343506,
-0.3954727351665497,
-0.2347874492406845,
0.0345877930521965,
-0.35793447494506836,
0.121322430670... | |
I want to be able to call properties on objects that might be null but not explicitly have to check whether they are null or not when calling.
Like this:
```
var something = someObjectThatMightBeNull.Property;
```
My idea is to create a method that takes an Expression, something like this:
```
var something = GetValueSafe(() => someObjectThatMightBeNull.Property);
TResult? GetValueSafe<TResult>(Expression<Func<TResult>> expression)
where TResult : struct
{
// what must I do?
}
```
What I need to do is to inspect the expression and determine if `someObjectThatMightBeNull` is null or not. How would I do this?
If there is any smarter way of being lazy I'd | [
0.2191435843706131,
-0.07628830522298813,
0.1313585788011551,
-0.02169102616608143,
0.0215181615203619,
-0.14607778191566467,
0.7243936657905579,
-0.38728222250938416,
0.05720594897866249,
-0.5191754698753357,
-0.01303083822131157,
0.6210096478462219,
-0.10885057598352432,
-0.0560189746320... | |
appreciate that too.
Thanks!
Well, a probable not optimized solution, but just see if it seems to work.
First, we create a result class
```
public class BalanceResult
{
public int Id { get; set; }
public DateTime CreationDate { get; set; }
public IList<int> BalanceResults { get; set; }
public int Difference { get; set; }
public int LastBalanecResultOfDay {get { return BalanceResults.Last(); }} | [
0.3921867609024048,
-0.37236425280570984,
0.4753294587135315,
-0.0418592132627964,
0.3144493103027344,
0.3850364089012146,
-0.2975400984287262,
-0.2525065839290619,
-0.03743458911776543,
-0.5379514694213867,
0.06533612310886383,
0.3660544157028198,
0.003042253665626049,
0.00278402492403984... | |
public bool HasManyResults {get { return BalanceResults != null && BalanceResults.Count > 1; }}
public int DailyDifference { get { return HasManyResults ? BalanceResults.Last() - BalanceResults.First() : BalanceResults.First(); } }
}
```
then we change a little bit our query
```
var query = db.Balances
.GroupBy(m => new | [
0.20512287318706512,
-0.26518896222114563,
0.5659272074699402,
-0.17939908802509308,
-0.019927240908145905,
0.22855046391487122,
0.3548673987388611,
-0.39440369606018066,
-0.255276083946228,
-0.4619462192058563,
-0.2987992465496063,
0.5562419295310974,
-0.41727912425994873,
0.3447088897228... | |
{
id = m.Id,
year = SqlFunctions.DatePart("mm", m.CreationDate), | [
0.17481690645217896,
-0.1796455979347229,
0.35258948802948,
0.12078583240509033,
0.45637720823287964,
0.22835063934326172,
-0.04454437643289566,
0.16785576939582825,
-0.4280761182308197,
-0.39290952682495117,
-0.07010821998119354,
0.07462261617183685,
0.1468004435300827,
0.7438763380050659... | |
month = SqlFunctions.DatePart("dd", m.CreationDate),
day = SqlFunctions.DatePart("yyyy", m.CreationDate) | [
0.1100553646683693,
-0.1361466944217682,
0.4774746298789978,
0.16721785068511963,
-0.11537296324968338,
0.09449158608913422,
0.08176127821207047,
0.3590182065963745,
-0.3100740313529968,
-0.269153892993927,
-0.10823642462491989,
-0.22097840905189514,
0.2358129620552063,
0.6377140283584595,... | |
}).ToList()//enumerate there, this is what we need from db
.Select(g => new BalanceResult
{ | [
0.38014402985572815,
-0.31686466932296753,
0.440886527299881,
-0.21413469314575195,
0.4816294014453888,
0.08684928715229034,
-0.01593734696507454,
-0.6103811860084534,
-0.15672335028648376,
-0.5583449006080627,
-0.11339817941188812,
0.4635440409183502,
-0.5342808365821838,
-0.0933133438229... | |
Id = g.Key.id,
CreationDate = new DateTime(g.Key.year, g.Key.month, g.Key.day),
BalanceResults = g.OrderBy(l => l.CreationDate).Select(l => l.BalanceValue).ToList() | [
0.304713636636734,
-0.31031692028045654,
0.4735449254512787,
-0.14564800262451172,
0.3829757273197174,
0.44194304943084717,
-0.34092646837234497,
-0.2100856900215149,
-0.4329322278499603,
-0.5906230807304382,
-0.2899213433265686,
0.09603927284479141,
-0.0905304029583931,
0.4220753312110901... | |
}).ToList();
```
and finally
```
foreach (var balanceResult in balanceResults.ToList())
{
var previousDayBalanceResult = balanceResults.FirstOrDefault(m => m.Id == balanceResult.Id && m.CreationDate == balanceResult.CreationDate.AddDays(-1));
balanceResult.Difference = previousDayBalanceResult != null ? balanceResult.LastBalanecResultOfDay - previousDayBalanceResult.LastBalanecResultOfDay : balanceResult.DailyDifference; | [
-0.07322192192077637,
-0.15078920125961304,
0.7281436324119568,
-0.46016639471054077,
0.2874412536621094,
0.42022252082824707,
0.08439011126756668,
-0.45431968569755554,
-0.37277016043663025,
-0.30084067583084106,
-0.17443032562732697,
0.4801659882068634,
-0.13267357647418976,
0.4983456730... | |
}
```
as indicated, performance (use of dictionaries, for example), code readability should of course be improved, but... that's the idea ! | [
0.11078042536973953,
0.4341716170310974,
0.13555343449115753,
0.06607234477996826,
0.27290093898773193,
-0.353094220161438,
0.33609524369239807,
0.21940878033638,
0.16748827695846558,
-0.5237142443656921,
-0.32198792695999146,
0.7735211253166199,
-0.18054284155368805,
0.057415373623371124,... | |
I've just been trying to learn and messing around with code. And I've come across something I did not expect to happen. I have a JLabel in a MainApp class, I create an ActionListener (HelloListener) which is passed the JLabel. When the button is pressed, the actionPerformed method should update the JLabel to "Hello again!". And it does, but why it does it confuses me.
However, I thought I would have to return the new JLabel? When I pass the HelloListener the JLabel, isn't that JLabel the property of the HelloListener class after it is passed? So when it updates it | [
-0.1503509134054184,
-0.29388633370399475,
0.6108635067939758,
-0.19040030241012573,
-0.19781632721424103,
-0.003617107169702649,
0.5506083965301514,
-0.09429421275854111,
-0.37518417835235596,
-0.6059035062789917,
-0.3060019612312317,
0.5149970054626465,
-0.30445438623428345,
0.0444509983... | |
will only update the one in HelloListener, and I would then have to return it?
Why when I update the JLabel in the HelloListener does it also update in the MainApp class?
Here's the code:
```
public class MainApp extends JFrame {
public static void main(String[] args) {
new MainApp();
}
public MainApp() {
setLayout(new GridLayout (2,1));
setSize(200,200);
JLabel jl = new JLabel("Hello!"); | [
0.12261367589235306,
-0.19503502547740936,
0.9415796995162964,
-0.4045378565788269,
0.23200592398643494,
0.11176372319459915,
0.4321041703224182,
-0.270574688911438,
-0.05641753971576691,
-0.8424347043037415,
-0.22083760797977448,
0.2694724202156067,
-0.39822643995285034,
0.181314840912818... | |
add(jl);
JButton jb = new JButton("Click me!");
jb.addActionListener(new HelloListener(jl));
add(jb);
setVisible(true);
}
}
```
and
```
public class HelloListener implements ActionListener {
JLabel jl;
public HelloListener(JLabel jl) {
this.jl = jl;
}
@Override
public void actionPerformed(ActionEvent arg0) {
jl.setText("Hello again!"); | [
-0.35119515657424927,
-0.43326738476753235,
0.7360313534736633,
-0.8106625080108643,
0.013595477677881718,
0.3597535789012909,
0.4030102789402008,
-0.30177849531173706,
-0.22317247092723846,
-0.4986472725868225,
-0.6338323354721069,
0.6698340773582458,
-0.6920495629310608,
-0.0632083341479... | |
}
}
```
> When I pass the HelloListener the JLabel, isn't that JLabel the
> property of the HelloListener class after it is passed? So when it
> updates it will only update the one in HelloListener, and I would then
> have to return it?
This is where the breakdown in your understanding is. When you "pass the JLabel", you are passing a **reference to the JLabel** (you are actually passing the reference by value, which you should look up as soon as you understand your current issue, because it is very important with Java). The underlying object instance still | [
-0.13044139742851257,
0.14837254583835602,
0.2618785798549652,
-0.27146467566490173,
0.11610216647386551,
-0.3985866904258728,
0.5225188732147217,
0.02915835566818714,
0.004166082013398409,
-0.7029294967651367,
-0.14540132880210876,
0.7736497521400452,
-0.42157021164894104,
0.2816592156887... | |
exists everywhere it did before. So the `JLabel jl` in the `HelloListener` instance is just a **reference to the same actual JLabel instance** that is presented in the gui.
This is fundamental to how Java (and many programming languages) works. If you do
`Dog d = new Dog();`
and then pass `d` to a method
`walk(d);`
and `walk` looks like
```
public void walk(Dog dog) {
dog.setLastWalkTime(now());
dog.attachLeash();
}
```
`dog` in the method, and `d` in the calling scope, **both point to the same Dog instance**. So as sson as you set the lastWalkTime, the underlying instance is modified. If right after `walk` | [
-0.030949754640460014,
-0.14687970280647278,
0.5376409292221069,
-0.44503360986709595,
0.28475427627563477,
-0.25199922919273376,
0.406703382730484,
-0.29208579659461975,
-0.22340692579746246,
-1.08806574344635,
-0.2874985933303833,
0.4368569254875183,
-0.4793166220188141,
0.15601179003715... | |
you looked at `d`, you would see the `lastWalkTime` value you set in the method. | [
0.535554051399231,
-0.5102694630622864,
-0.12525628507137299,
-0.055062975734472275,
-0.01827501319348812,
0.29225000739097595,
0.13850507140159607,
-0.38333964347839355,
0.2091263234615326,
-0.8058364391326904,
0.35147494077682495,
0.3555157780647278,
0.1410125344991684,
0.208295121788978... | |
Here is my table and the data contained in it:
```
Table: first
+----------+------+
| first_id | data |
+----------+------+
| 1 | 5 |
| 2 | 6 |
| 3 | 7 |
| 4 | 6 |
| 5 | 7 |
| 6 | 5 |
| | [
-0.2877379357814789,
0.4103640615940094,
0.5927277207374573,
-0.09168063849210739,
0.14661747217178345,
0.04084431380033493,
-0.15264126658439636,
-0.29615211486816406,
0.0772237479686737,
-0.5935827493667603,
-0.1336067020893097,
0.22724759578704834,
-0.16026753187179565,
0.16343133151531... | |
7 | 7 |
| 8 | 6 |
| 9 | 5 |
| 10 | 7 |
+----------+------+
Table: second
+-----------+----------+----------+
| second_id | first_id | third_id |
+-----------+----------+----------+
| 1 | 1 | 2 |
| 2 | | [
-0.6419969201087952,
0.018693314865231514,
0.6787567138671875,
-0.1810324341058731,
-0.0894150659441948,
0.3348453640937805,
0.16968804597854614,
-0.4187740385532379,
-0.2829365134239197,
-0.4130679965019226,
-0.39512479305267334,
0.39095184206962585,
-0.1708221137523651,
0.084139049053192... |
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