Check if a value exists in pandas dataframe index
I am sure there is an obvious way to do this but cant think of anything slick right now. Basically instead of raising exception I would like to get `True` or `False` to see if a value exists in panda...
String's Maximum length in Java - calling length() method
In , what is the maximum size a `String` object may have, referring to the `length()` method call? I know that `length()` return the size of a `String` as a `char []`;
Under which circumstances textAlign property works in Flutter?
In the code below, `textAlign` property doesn't work. If you remove `DefaultTextStyle` wrapper which is several levels above, `textAlign` starts to work. Why and how to ensure it is always working? ...
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- 2 Aug at 16:9
How can I match up permutations of a long list with a shorter list (according to the length of the shorter list)?
I’m having trouble wrapping my head around a algorithm I’m try to implement. I have two lists and want to take particular combinations from the two lists. Here’s an example. ``` names = ['a', 'b'] num...
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- 2 Mar at 01:11
PHP AES encrypt / decrypt
I found an example for en/decoding strings in PHP. At first it looks very good but it wont work :-( Does anyone know what the problem is? ``` $Pass = "Passwort"; $Clear = "Klartext"; $crypted = fnE...
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- 20 Dec at 06:44
Using if elif fi in shell scripts
I'm not sure how to do an `if` with multiple tests in shell. I'm having trouble writing this script: ``` echo "You have provided the following arguments $arg1 $arg2 $arg3" if [ "$arg1" = "$arg2" && "...
Class 'DOMDocument' not found
I've found an error on a page in my Magento application; it always show this message error when I visit it: > Fatal error: Class 'DOMDocument' not found in /home/.../lib/Zend/Feed/Abstract.php on lin...
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- 11 Jul at 06:49
How to find out what character key is pressed?
I would like to find out what character key is pressed in a cross-browser compatible way in pure Javascript.
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- 28 May at 21:42
Fastest way to check if string contains only digits in C#
I know a few ways of how to check if a string contains only digits: RegEx, `int.parse`, `tryparse`, looping, etc. Can anyone tell me what the way to check is? I need only to the value, no need to ac...
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- 21 Dec at 15:9
Postgres: check if array field contains value?
I'm sure this is a duplicate question in the sense that the answer is out there somewhere, but I haven't been able to find the answer after Googling for 10 minutes, so I'd appeal to the editors not to...
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- 22 Sep at 15:45
How to convert an object to JSON correctly in Angular 2 with TypeScript
I'm creating an Angular 2 simple CRUD application that allows me to CRUD products. I'm trying to implement the post method so I can create a product. My backend is an ASP.NET Web API. I'm having some ...
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- 14 Jul at 10:45
The client and server cannot communicate, because they do not possess a common algorithm - ASP.NET C# IIS TLS 1.0 / 1.1 / 1.2 - Win32Exception
I have an issue with a C# PayTrace Gateway. The below code was working fine until yesterday when I believe they turned off SSL3 due to the Poodle Exploit. When running the code below we got the follow...
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- 23 Sep at 20:27
How can I change the current URL?
I have the following code that changes the pages from within JavaScript: ``` var newUrl = [some code to build up URL string]; window.location.replace(newUrl); ``` But it doesn't change the top URL,...
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- 21 Jan at 08:50
How do I find which rpm package supplies a file I'm looking for?
As an example, I am looking for a `mod_files.sh` file which presumably would come with the `php-devel` package. I guessed that `yum` would install the `mod_files.sh` file with the `php-devel x86_64 5....
how to fix 'Access to XMLHttpRequest has been blocked by CORS policy' Redirect is not allowed for a preflight request only one route
[](https://i.stack.imgur.com/8BpwB.png)[](https://i.stack.imgur.com/FAz9Q.png)i'm setting a laravel and vuejs. CORS plugin for laravel and frontend side i use Axios to call REST api i got this ERROR...
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- 17 Jan at 05:30
How do you do Impersonation in .NET?
Is there a simple out of the box way to impersonate a user in .NET? So far I've been using [this class from code project](http://www.codeproject.com/KB/cs/zetaimpersonator.aspx) for all my impersonat...
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- 11 Oct at 14:47
Fragment onResume() & onPause() is not called on backstack
I have multiple fragment inside an activity. On a button click I am starting a new fragment, adding it to backstack. I naturally expected the `onPause()` method of current Fragment and `onResume()` of...
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- 17 Dec at 19:15
Assert equals between 2 Lists in Junit
How can I make an equality assertion between lists in a test case? Equality should be between the content of the list. For example: ``` List<String> numbers = Arrays.asList("one", "two", "three"); ...
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- 2 Dec at 16:19
error: expected primary-expression before ')' token (C)
I am trying to call a function named `characterSelection(SDL_Surface *screen, struct SelectionneNonSelectionne sel)` which returns a `void` This is the `.h` of the function I try to call: ``` struct S...
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- 27 Jul at 15:55
Is there an exponent operator in C#?
For example, does an operator exist to handle this? ``` float Result, Number1, Number2; Number1 = 2; Number2 = 2; Result = Number1 (operator) Number2; ``` In the past the `^` operator has served ...
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- 19 Apr at 16:15
HTTPS connections over proxy servers
Is it possible to have HTTPS connections over proxy servers? If yes, what kind of proxy server allows this? Duplicated with [How to use Socks 5 proxy with Apache HTTP Client 4?](https://stackoverflo...
How do I disable "missing docstring" warnings at a file-level in Pylint?
Pylint throws errors that some of the files are missing docstrings. I try and add docstrings to each class, method and function, but it seems that Pylint also checks that files should have a docstring...
Single controller with multiple GET methods in ASP.NET Web API
In Web API I had a class of similar structure: ``` public class SomeController : ApiController { [WebGet(UriTemplate = "{itemSource}/Items")] public SomeValue GetItems(CustomParam parameter) ...
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- 18 May at 07:5
Creating a generic method in C#
I am trying to combine a bunch of similar methods into a generic method. I have several methods that return the value of a querystring, or null if that querystring does not exist or is not in the cor...
npx command not found
I am working with webpack and I need to execute `./node_modules/webpack/bin/webpack.js` using `npx`. `npx webpack` would run the webpack binary (`./node_modules/webpack/bin/webpack`), but each time I ...