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d1901
You can change your observable definition to: Observable<Object> observable = observable(); observable.flatMapSingle(id -> { return rxSend(VERTICLE_1_ADDRESS, id).flatMap(i -> { // Logic dependent on if item was found // id is visible here }); }).subscribe(); Then the id will be visible to your second lamb...
d1902
personally i would use yaml. it's on par with json for encoding size, but it can represent some more complex things (e.g. classes, recursive structures) when necessary. In [1]: import yaml In [2]: x = [1, 2, 3, 'pants'] In [3]: print(yaml.dump(x)) [1, 2, 3, pants] In [4]: y = yaml.load('[1, 2, 3, pants]') In [5]: y ...
d1903
I think there is agreement that, for interactive usage, this behavior is not optimal and it is likely going to change to the expected behavior in the REPL, IJulia etcetera soon. You can find the discussion here: https://github.com/JuliaLang/julia/issues/28789 Note, however, that everything works as expected once you wr...
d1904
I found that MenuItemCompat.setOnActionExpandListener(...) is not working if you don't pass: searchItem .setShowAsAction(MenuItemCompat.SHOW_AS_ACTION_COLLAPSE_ACTION_VIEW | MenuItemCompat.SHOW_AS_ACTION_ALWAYS); But this is changing the SearchView and is replacing the DrawerToggle ...
d1905
You could overflow the text outside the td but you need to insert a div tag like this <td><div>your text goes here</div></td> See this demo
d1906
As mentioned in "Show system files / Show git ignore in osx", use in your Finder ⌘⇧. That should show you the hidden folder .git/, which include all the history of the repo. And for a repo of binaries (like jpeg images), and new version of an image might take quite a lot of place (poor diff, poor compression between ea...
d1907
you can use scrollview in code like this :: <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="#FFFFFF"> <ScrollView android:id="@+id/ScrollView01" android:layout_width="fill_parent" android:layout_hei...
d1908
To double a number (which is stored in a variable named n here): (* 2 n). To add one: (1+ n). Note that 1+ is the name of a function. It is the same as (+ n 1). Now, let's say that you have some scope (e. g. a function body) where you have a variable named n. You now create a new variable d using let: (let ((d (* n ...
d1909
* *GO to your Azure Active Directory *Click on Groups *Click “+ New Group” *Select the group type “Security” *Enter group name (any name you want) *Select Membership type “Assigned” *In the owner select the owner of the application *In the members select the application that you created/registered in the active...
d1910
Seems like there are no errors in XML fragment you shared. I know the sample you're playing with, the error caused by wrong ID resource definition in ids.xml <item name="button" type="id">Button</item> But according to documentaion ID definition takes no value. So the fix is: <item name="button" type="id" />
d1911
The comments already have the solutions really... but to wrap some more advice around it: Your Problem You're just missing a space between the color and number. General Advice * *Make sure everything is the same case before comparing (e.g. all lower/upper). *Get rid of white space when handling tokens. *Keep variab...
d1912
A char can only store 1 character not a set of characters, and by directly comparing the string to a character array won't work because of the null character This will work , hope it helps #include <stdio.h> #include<string.h> int main() { char name[10]; printf("Who are you? \n"); fgets(name,10,stdin); printf("Go...
d1913
Add the admin permission to .npm home directory. sudo chown -R $(whoami) ~/.npm
d1914
Perhaps the clearest way is to start with the lists as CTEs: with bases as ( select 1 as base from dual union all select 2 as base from dual union all select 3 as base from dual ), lots as ( select 3 as lot from dual union all select 4 as lot from dual union all select 20 as lot from dua...
d1915
In PHP use .= to append strings, and not +=. Why does this output 0? [...] Does PHP not like += with strings? += is an arithmetic operator to add a number to another number. Using that operator with strings leads to an automatic type conversion. In the OP's case the strings have been converted to integers of the valu...
d1916
var obj = new { files = new object[] { "http://www.example.com/css/styles.css", new { url = "http://www.example.com/cat_picture.jpg", headers = new Dictionary<string,string> { { "Origin", "cloudfl...
d1917
I don't know exactly what this site is doing, but you can suggest that Facebook use a specific image (not necessarily one found on the page) by using the og:image Open Graph tag. For example, something like this would go in the <head> portion of your site: <meta property="og:image" content="http://www.barakabits.com/w...
d1918
Normally, you'd double the backslash: '\\' Use os.path.join() to join directory and filename elements, and use string formatting for the rest: os.path.join(Id, TypeOfMachine, '{}_{}'.format(year, month), '{}_{}_{}.csv'.format(year, month, day)) and let Python take care of using the correct directory sep...
d1919
Fixed it! function handler (request) { var json = new OpenLayers.Format.JSON (); var response = json.read (request.responseText); //console.log(response); var layer_data = response.layers for (var i in layer_data) { var layer_name = layer_d...
d1920
I observed that you have used wrong variable to replace the html in success, I have replace PartialView to partialView var text = 'test'; $.ajax({ url: '@Url.Action("Subcategory", "Category")', type: 'GET', dataType: 'JSON', data: { item: text }, success: function (partialView) { $('#part...
d1921
Your problem arises because urlsCleaned is a pd.DataFrame not a pd.Series, to solve you have to change the line to: urlsCleaned = NWO_data["urls"] Note that they look almost the same, but in your case, it creates a pd.DataFrame with one column, and here it creates an pd.Series.
d1922
You can prevent the effects of margin collapsing with: body { overflow: hidden } That will make the body margins remain accurate. A: I had similar problem, got this resolved by the following CSS: body { margin: 0 !important; padding: 0 !important; } A: I had same problem. It was resolved by following cs...
d1923
On onSwiped method, add- if (direction == ItemTouchHelper.RIGHT) { //whatever code you want the swipe to perform } then another one for left swipe- if (direction == ItemTouchHelper.LEFT) { //whatever code you want the swipe to perform } A: Make use of the direction argument to onSwiped(). See the documentation. You ...
d1924
If data you want is Property: var values = typeof(potato) .GetProperties() .Select(p=>p.GetValue(query,null)) .ToArray(); If data is Field: var values = typeof(potato) .GetFields() .Select(p=>p.GetValue(query)) .ToArray(); If some property must be returned you can filter PropertyInfoes or Fiel...
d1925
myobj(num1, num2) This attempts to call your myobj object like a functor. Instead you just want to pass myobj: mymap.insert(pair<string,ap_pair>(name, myobj));
d1926
Except center layoutUnit, other layout units must have dimensions defined via size option. Like this: <p:layout fullPage="true"> <p:layoutUnit position="north" size="50"> <h:outputText value="Top content." /> </p:layoutUnit> <p:layoutUnit position="south" size="100"> <h:outputText value="Bot...
d1927
Set up debugging on the PHP Side (XDebug works pretty well in most scenarios). Also, for ANY AJAX/web request functionality, I run fiddler (http://www.telerik.com/fiddler) to see what is being returned to the client from the web server (it will give you a complete view of the web request). Hope this helps!
d1928
You can always queue your ajax calls so they happen 1 at a time. There are jquery plugins to help with this: http://www.protofunc.com/scripts/jquery/ajaxManager/ To me however, 6 calls does not seem too bad, as long as they dont generate a lot of server activity (hard db queries, file handling, etc...) A: alternative...
d1929
Do it as follows: import java.util.Arrays; import java.util.regex.Pattern; public class Main { public static void main(String[] args) { String input = "i was hoping the number"; String[] valid = new String[] { "nip", "pin" }; if (Arrays.stream(valid).anyMatch(p -> Pattern.compile("\\b" + p ...
d1930
edited My original answer works, but there's a much better way of doing this, by creating your own build system. This use case is exactly why the feature is there. Go to Tools → Build System → New Build System… (all the way at the bottom) and enter the contents below. Save as C++ 11 Single File.sublime-build, and it wi...
d1931
The size in bytes is system dependent and should simply be queried like this: unsigned int pidLength = sizeof(pid_t); Edit: If you're worried about the length decimal representation as in printf("%d", myPID);, I suggest querying that, too. For example, the snprintf function returns the number of characters (without nu...
d1932
I don't think there is such an option. You just have to remove it manually from the admin pages you mostly use
d1933
to be independent of the operating system used(Win,Linux(Ubuntu,..),Mac),Execute this command : java -cp h2*.jar org.h2.tools.Console It will open the browser : http://localhost:8082 A: I've generally just used their web interface, found at http://localhost:8082 by default. Their quickstart guide covers making i...
d1934
According to documentation, you can use the rules' priorities to achieve your goal: create one rule to cancel all requests and another rule, with higher priority, to ignore the first rule if the host is google.com.
d1935
Unfortunately, the OptionMenu widget is somewhat poorly implemented. Regardless of your preferences, the optionmenu isn't designed to accept keyword arguments for the first three parameters master, variable, and value. They must be presented in that order as positional arguments. self.menu_m = tk.OptionMenu(self.frame_...
d1936
You can download source code for clang svn checkout http://llvm.org/svn/llvm-project/cfe/trunk The header should be in the include/clang-c folders, you can edit the cmake file and pass in the location of the header in the CPP flags (-I) cmake file would be here:- ycm/CMakeFiles/ycm_core.dir/flags.make
d1937
You can rewrite it this way int main(){ int input, maxDiv = 0; int div = 2; scanf("%d", &input); for(; !maxDiv; div++) if(!(input%div)) maxDiv = input/div; printf("%d\n", ( maxDiv == 1 || input < 0 ? 0 : maxDiv ) ); return 0; } It is an infinite loop that will exit as soo...
d1938
Pass an Activity to AsyncTask and just use : ImageView principal = (ImageView) passedActivity.findViewById(R.id.imagen_home_0); or get inflater from Context like this : LayoutInflater inflater = LayoutInflater.from(context); View row = inflater.inflate(R.layout.your_viw_that_contains_that_image, parent, false); Image...
d1939
Since you asked for objective-C code, I assume you want to open either the appstore or the app on a certain URL. However, objective-c code is the least of the efforts here since it's mostly configurations that are at work for this. To open an app you need to provide it a custom URL scheme: http://iosdevelopertips.com/c...
d1940
you can use this: str = str.replace(/<.*>/g,''); See an example for match here var str = "<field name='itemid'>xx</field>"; str = str.replace(/<.*>/g, 'replaced'); console.log(str) Explanation: * *< matches the character < literally *.* matches any character (except newline) * *Quantifier: * Between zero ...
d1941
I think the cmdlet your looking for here is Get-AzureRmDataFactoryActivityWindow this accepts a run window and will return the result of a time slice either Ready, Waiting, Failed etc. Example of use: Get-AzureRmDataFactoryActivityWindow ` -DataFactoryName $ADFName.DataFactoryName ` -ResourceGroupName $Resource...
d1942
Not all of the Ribbon commands exist in the legacy CommandBars collection. To get a full listing of the available commands create a blank document in Word and run the code below (from Word). Sub ListCommands() Dim cbar As CommandBar Dim cbarCtrl As CommandBarControl For Each cbar In Application.CommandBars F...
d1943
This worked for me: require "watir-webdriver" browser = Watir::Browser.new browser.goto "ideone.com" browser.div(:id => "file_div").textarea.set "1=1" Are you sure you need to set text in textarea? If you are dealing with wysiwyg editor, you probably need to use send_keys: browser.pre.send_keys "1=1" More information...
d1944
I'm going to use the documentation I posted earlier to show. public function submitData(Request $request) { $data = $request->all(); // check for form error and redirect back with error message and form input $validator = Validator::make($data); if ($validator->fails()) { return redirect() ...
d1945
Language and runtime are two different things. They are not really related IMHO. Therefore, if your existing runtime offers a GC already, there must be a good reason to extend the runtime with another GC. In the good old days when memory allocations in the OS were slow and expensive, apps brought their own heap manager...
d1946
You have to declare the data types of the columns.
d1947
The below code snippet achieves the necessary logic (sans the React Hooks, API, and other items): const movies = [{ name: "a", genre: "comedy", year: "2019", }, { name: "b", genre: "drama", year: "2019", }, { name: "c", genre: "suspense", year: "2020", }, { name: "d...
d1948
under usersActions.js file you are setting users instead of tasks. case "SET_TASKS": state = { ...state, users: action.payload } break; default: it should be like: case "SET_TASKS": state = { ...state, tasks: action.payload } break; default:
d1949
You have to loop over the items of the dictionary. for key, value in data2['roles'].items(): res= value['name'] print(res) A: There is nothing wrong with your code, I run it and I didn't get any error. The problem that I see though is your Json file, some commas shouldn't be there: { "count": 6, "results": [ ...
d1950
It is quite common in Wicket to replace only portions of a page using Ajax. See these examples. Wicket is also easily used in combination with jQuery and other JavaScript frameworks. A: So called single page applications (a single page who's components get constantly replaced and/or updated via ajax) are the way almo...
d1951
You can use the apply method def age_total(x): if x < 2: return * 1.2 elif x > 8: return x * 1.1 else: return x * 0.9 df['Total']= df['age'].apply(age_total)
d1952
You should make your Item implement Parcelable. Try this site to make your Item Parcelable A: Item is neither Parcelable nor Serializable . And i would not like to make any changes in that. then you can't. I would strongly recommend you to look into the Parcelable interface, avoiding tricks like making the field p...
d1953
Well, there does not seem to be a direct attribute/method to change the max limit but what you can do is set a custom value in the 'list_per_page' attribute of the ModelAdmin class admin.py like below: class MyAppAdmin(admin.ModelAdmin): list_per_page = 500 class Meta: model = MyApp The default v...
d1954
If your grid is regular (i.e. similar to the output of meshgrid), you could also use image, imagesc or, if the imageprocessing toolbox is available, also imshow together with a matching colorscale. imagesc(Z)
d1955
NSJSONSerialization in Objective-c TRY 1: If Json return Array -(void)getdata:(NSString *)send { NSURL *url = [[NSURL alloc]initWithString:send]; NSData *data = [[NSData alloc] initWithContentsOfURL:url]; NSError *e = nil; NSArray *jsonArray = [NSJSONSerialization JSONObjectWit...
d1956
A member variable in a class has a life-span corresponding to the life-span of the class's instances, unless declared static. struct Foo { int x; static int y; }; This Foo, and therefore its x, has program life-span: static Foo foo; This one is auto: int main() { Foo foo; } This one is dynamically allocated ...
d1957
It is possible, of course. Have a look at interfacing. For the iOS app I would use the Multi-OS engine. Use the normal gdx-setup jar file to create moe module.
d1958
You could try Apache Sanselan for the dimension and Droid for the identification.
d1959
On the button press event can you just load both? ScriptManager.RegisterStartupScript(Page, Page.GetType(), "popup", "window.open('" + url1+ "','_blank')", true); ScriptManager.RegisterStartupScript(Page, Page.GetType(), "popup", "window.open('" + url2+ "','_blank')", true);
d1960
You could use a VBA macro similar to the following: Sub SubjectCheckerMessageRule(newMail As Outlook.mailItem) ' "script" routine to be called for incoming mail messages ' This subroutine has to be linked to this mail type using Outlook's rule assistant Dim EntryID As String Dim StoreID As Variant ...
d1961
Assuming: var myObj = [{"a": "1", "b": "2", "c": "3"}]; Then, you can do this: var result = []; // output array for(key in myObj[0]){ // loop through the object if(myObj[0].hasOwnProperty(key)){ // if the current key isn't a prototype property var temp = {}; // create a temp object te...
d1962
Javadoc: https://javadl.oracle.com/webapps/download/AutoDL?BundleId=245778_df5ad55fdd604472a86a45a217032c7d The source should be part of the JDK, search for src.zip in your JDK directory. How to attach JDK source code to IntelliJ IDEA A: I didn't know that patch releases don't change the public API, so both Thomas Beh...
d1963
first check if the methods and the classes you are going to use are public, then you can add the projects, with the methods you need to call, as dependency in the pom.xml file.
d1964
In C++, there's no direct type which exactly represents a 2D "vector"/"matrix"/"tensor". What you can create, is a vector of vectors. You'd write that as std::vector<std::vector<int>> - each element of the outer vector is itself a vector. But there's an important difference here: each of the inner vectors has its own l...
d1965
8(%esp) is the first number, under the framework of x86. enter 40 2 or 60 3 or 80 4 should work. Equivalent to the following logic #include <stdio.h> #include <stdlib.h> void explode_bomb() { printf("explode bomb.\n"); exit(1); } unsigned func4(int val, unsigned num) { int ret; if (val <= 0) ...
d1966
The coordinates/sizes passed to glReadPixels() are in window coordinates. The window coordinate system has its origin in the lower left corner of the window, with a unit of pixels. This is not to be confused with the NDC (normalized device coordinates) system used for vertex coordinates, which has its origin in the cen...
d1967
You can use removeEventListener() function. documentation example: let wheelHandler = function(e) { toggleListener(wheelHandler, false) const isScrollingDown = Math.sign(e.wheelDeltaY); // call some function once, don't listen for wheel event anymore // then listen for event again when done toggleL...
d1968
The underlying issue is that the output of print for a time series object is quite heavily processed by .preformat.ts. If you want to convert it to a data frame that is visually similar to the print results this should do: df <- data.frame(.preformat.ts(datasets::AirPassengers), stringsAsFactors = FALSE) Note that thi...
d1969
Change from onmouseout="Start.pause;"> to onmouseout="Start.pause();">. You missed the parenthesis in the pause function
d1970
I recommend you double check your PATH variable. As per: "If your installation is unsuccessful due to the find command not being recognized, ensure your PATH environment variable is set to include the folder containing find. Usually, this is C:\WINDOWS\system32;" I noticed that you added the logs :), I would like to me...
d1971
try select case when cs(User-Agent) like "%android%" then "Android" when cs(User-Agent) like "%black%" then "Blackberry" when cs(User-Agent) like "%windows%" then "Windows" when cs(User-Agent) like "%iphone%" then "iPhone" else "Other" end as Browser, count(*) as ...
d1972
I have just figured out how to do it! I'm going to post here what I did so maybe it will result helpful for some people: It's just simple as invocating it using a variable. Button code: var button = Ext.create('Ext.Button', { text : 'Button', renderTo : Ext.getBody(), listeners: { click: functio...
d1973
You can use SandCastle. It is now maintained as part of SandCastle Help File Builder or SHFB. http://shfb.codeplex.com/ SandCastle depends on Microsoft Help Workshop, which you have to download separately. If you want to just create your own help system and not product API documentation, then just use the HTML Help W...
d1974
/usr/local/bin would be the usual choice for user or third-party executables. That way it won't get wiped out when you update the OS. See also: Where do you keep your own scripts on OSX? - the question is about scripts rather than binaries, but the same logic applies.
d1975
This is not working. The major problem is that I don't understand how to relate the CanExecute value to the Button. Bind its Command property to the same command: <Button Content="Button" Command="{x:Static local:CustomCommands.ReceivedFocus}" /> The Button should then be enabled or disabled based on the value that y...
d1976
I use it like this, $ionicLoading.show(); $ionicPlatform.ready(function() { /* insert your code here */ $ionicLoading.hide().then(function(){ console.log("The loading indicator is now hidden"); }); $state.go("tab.dash"); });
d1977
webadmin doesn't really report counts, indeed the highest ID in use is reported. Since multiple properties are stored internally in the same block you'll see misleading numbers there. To validate: MATCH (n) where has(n.woka_title) and has (n.woka_id) RETURN count(n) == 19798966 should return true.
d1978
ok c.JSON(http.StatusOK, myArray) worked. But I cannot see the Id field in the response. Any reason why? Is it because of 'int64' dataType?
d1979
The following example code extracts all the words (English alphabet only) from every line and process them (counts the number of words, and retrieve instances of each unique word). import re MESSAGE = 'Please input a new line: ' TEST_LINE = ''' Well, my heart went "boom" When I crossed that room And I held her hand in...
d1980
There is no way to extend views that way in Rails. You can however, accomplish this by using partials. In your engine, write a partial view file users/_show.html.erb and then render it in your app's view: # app/views/users/show # will look for a partial called "_show.html.erb" in the engine's and app's view paths. ren...
d1981
It's failing because you are casting your JSON to [NSDictionary]. When you get multiple objects, you get an array of dictionaries, but when you get a single object, you get a single dictionary. You should try to cast to NSDictionary if casting to [NSDictionary] fails. If both fail then you should throw the error.
d1982
Try this func toFloat(data []byte) (float, error) { return strconv.ParseFloat(strings.ReplaceAll(string(data), ",", ""), 64) } Split your original byte array by space, then pass it to this function. It will return either the float you need or error
d1983
Yes, you can use SPC f f, enter the name of the new file and then select the line starting with [?] (which is the default if no other file matches). Note you can also use this to create files in non-existing subfolders, like SPC f f my/sub/folder/file.txt RET. A: If you are using the standard vim like keybindings, :e ...
d1984
This can be done without recursion if you want [0..20] |> Seq.mapi (fun i elem -> (i/size),elem) |> Seq.groupBy (fun (a,_) -> a) |> Seq.map (fun (_,se) -> se |> Seq.map (snd));; val it : seq<seq<int>> = seq [seq [0; 1; 2; 3; ...]; seq [5; 6; 7; 8; ...]; seq [10; 11; 12; 13; ...]; seq [15; 16; ...
d1985
Solved. Global variable 'auth2' is automatically initialised each time the page is loaded and can be used to sign users in. The script is called as: <script src="https://apis.google.com/js/api:client.js?onload=onLoadCallback" async defer></script> <script> var auth2; var googleUser = {}; var auth3; window.onLoadCall...
d1986
Not sure why you have braces after idvid but it should just be "http://www.hitbox.tv/#!/embedvideo/" + idvid + "?autoplay=true"; To get the media_id of the first object in the data array: var idvid = data.video[0].media_id; A: I called the URL and got it using this data.video[0].media_id so (dropping the () from t...
d1987
You are wrong with the path name. Look at the below code. import { Component } from '@angular/core'; import { Http } from '@angular/http'; //modified the below lines import { ReleasesComponent } from './app/releases/releases.component'; import { ReleasesService } from './app/releases/releases.service'; @Component({ ...
d1988
You can't put GlSurfaceView into CordovaWebView, but you can place in next/top of to each other. Create Relative view and put both of them into it.
d1989
If I understand your question, this should do it. SELECT DISTINCT(referer), COUNT(referer) AS frequency FROM url_log GROUP BY referer ORDER BY frequency DESC; A: for selecting each different value of a column use this query SELECT DISTINCT(column) AS columnname_key FROM table ; to count duplicate use this code SELE...
d1990
com.subdeveloper.starcraftbuilds.Terran.onCreate(Terran.java:46) put a break point in and run the debugger. Something is null, and I'm guessing it's the list. It's on like 46. Btw, I'm gold random player. Used to be high diamond Toss. Good luck with the project. A: Your ListView is null that means that either don't h...
d1991
Checking every shape in the stage is the only way to check intersections. If you need some optimizations you can try debouncing or throttle strategies. E.g. check interactions every 100ms instead of every mousemove or touchmove events.
d1992
I would advise wrapping each portion in its own form: <?php $id = $fgmembersite->UserID(); echo "$id"; $db_host = 'localhost'; $db_name= 'site'; $db_table= 'action'; $db_user = 'root'; $db_pass = ''; $con = mysql_connect($db_host,$db_user,$db_pass) or die("خطا در اتصال به پايگاه داده"); $selected=mysql_select_db($db_...
d1993
caniuse.com explains that: The High Efficiency Video Coding (HEVC) compression standard is a video compression format intended to succeed H.264 and further reveals that browser support for HEVC is currently very poor. @Gyan comments that: Your source video is HDR. You'll have to tonemap it to SDR. Now I assume @Gya...
d1994
facebooklikes: Well, developer.facebook has limitation. So you probably need to hire an expert in programming.
d1995
Try using .visamastercard, .shipna { display: inline-block; } There will be a space between the icon as long as the img tags aren't immediately adjacent to each other (i.e., there's a newline or space between the img tags).
d1996
From the source of your page it can be seen that your problem start with: <html> lang="en"> you need to change that to: <html lang="en">
d1997
I have added a button to the frame and called the method which you wrote and it worked fine for me. import java.awt.BorderLayout; import java.awt.Button; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JScrollPane; impor...
d1998
Thanks to @user16320675's comment, I'm answering my own question. The reason is that the number 988530483551494912L has precision beyond the limit of the double type's precision, and Double.toString() (and similarly %f) will, as per documentation, only use the minimum number of significant digits required to distinguis...
d1999
I'm not sure if this is what you are asking, but I interpreted this as list the files in a given directory, and then check if the input is in the file. import os string = input("Please type the input ") directory = "c://files//python" for file in os.listdir(directory): if file.endswith(".txt"): filecont...
d2000
In order to be able to chain methods, those methods need to return the original Helper instance. Try returning $this from inside the methods. Like RomanPerekhrest commented however, I dont think the methods you listed here are suitable for chaining. You would be better off with adding another method to your class that ...