How to access a dictionary element in a Django template?
I would like to print out the number of votes that each choice got. I have this code in a template: ``` {% for choice in choices %} {{choice.choice}} - {{votes[choice.id]}} <br /> {% endfor %} `...
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- 21 Apr at 18:49
SQL Logic Operator Precedence: And and Or
Are the two statements below equivalent? ``` SELECT [...] FROM [...] WHERE some_col in (1,2,3,4,5) AND some_other_expr ``` and ``` SELECT [...] FROM [...] WHERE some_col in (1,2,3) or some_col in ...
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- 18 Feb at 14:42
Custom numeric format string to always display the sign
Is there any way I can specify a standard or custom numeric format string to always output the sign, be it +ve or -ve (although what it should do for zero, I'm not sure!)
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- 12 Mar at 08:4
How to get a variable name as a string in PHP?
Say i have this PHP code: ``` $FooBar = "a string"; ``` i then need a function like this: ``` print_var_name($FooBar); ``` which prints: ``` FooBar ``` Any Ideas how to achieve this? Is this ...
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- 1 Nov at 00:28
Convert char to int in C#
I have a char in c#: ``` char foo = '2'; ``` Now I want to get the 2 into an int. I find that Convert.ToInt32 returns the actual decimal value of the char and not the number 2. The following will...
Why does C# not provide the C++ style 'friend' keyword?
The [C++ friend keyword](http://www.cplusplus.com/doc/tutorial/inheritance/) allows a `class A` to designate `class B` as its friend. This allows `Class B` to access the `private`/`protected` members...
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- 23 May at 11:47
How do you do relative time in Rails?
I'm writing a Rails application, but can't seem to find how to do relative time, i.e. if given a certain Time class, it can calculate "30 seconds ago" or "2 days ago" or if it's longer than a month "9...
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- 15 Oct at 15:54
Embedding JavaScript engine into .NET
just wondering if anyone has ever tried embedding and actually integrating any js engine into the .net environment. I could find and actually use (after a of pain and effort, since it's pretty outdat...
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- 12 Mar at 18:19
Java Delegates?
Does the Java language have delegate features, similar to how C# has support for delegates?
Running actions in another directory
I've just started exploring Github actions however I've found myself placing a command in multiple places. I have a PHP project where the `composer.json` is not in the root, my structure looks like:...
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- 28 Sep at 10:29
VSCode single to double quote automatic replace
When I execute a `Format Document` command on a Vue Component.vue file VSCode replace all single quoted string with double quoted string. In my specific case this rule conflicts with electron-vue lin...
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- 27 May at 06:39
How to convert FormData (HTML5 object) to JSON
How do I convert the entries from a HTML5 `FormData` object to JSON? The solution should not use jQuery. Also, it should not simply serialize the entire `FormData` object, but only its key/value entri...
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- 31 Dec at 13:36
How can I remove duplicate lines in Visual Studio Code?
Say you have the following text: ``` abc 123 abc 456 789 abc abc ``` I want to remove all "abc" lines and just keep one. I don't mind sorting. The result should be like this: ``` abc 123 456 789 `...
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- 9 Jun at 12:25
PostgreSQL INSERT ON CONFLICT UPDATE (upsert) use all excluded values
When you are upserting a row (PostgreSQL >= 9.5), and you want the possible INSERT to be exactly the same as the possible UPDATE, you can write it like this: ``` INSERT INTO tablename (id, username, ...
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- 10 Nov at 16:25
How to send push notification to web browser?
I have been reading for past few hours about [Push Notification API](http://www.w3.org/TR/push-api/) and [Web Notification API](http://www.w3.org/TR/notifications/). I also discovered that Google & Ap...
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- 27 Dec at 23:52
Convert row names into first column
I have a data frame like this: ``` df VALUE ABS_CALL DETECTION P-VALUE 1007_s_at "957.729231881542" "P" "0.00486279317241156" 1053_at "320.632701283368"...
How to replace text in a string column of a Pandas dataframe?
I have a column in my dataframe like this: ``` range "(2,30)" "(50,290)" "(400,1000)" ... ``` and I want to replace the `,` comma with `-` dash. I'm currently using this method but nothing is changed...
Implementing Singleton with an Enum (in Java)
I have read that it is possible to implement `Singleton` in Java using an `Enum` such as: ``` public enum MySingleton { INSTANCE; } ``` But, how does the above work? Specifically, an `Objec...
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- 26 Dec at 03:18
Upgrade python packages from requirements.txt using pip command
How do I upgrade all my python packages from requirements.txt file using pip command? tried with below command ``` $ pip install --upgrade -r requirements.txt ``` Since, the python packages are su...
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- 16 Apr at 15:16
Nested rows with bootstrap grid system?
I want 1 larger image with 4 smaller images in a 2x2 format like this:  My initial thought was to house everything in one row. Then create t...
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- 9 Sep at 12:20
How can I parse a local JSON file from assets folder into a ListView?
I'm currently developing a physics app that is supposed to show a list of formulas and even solve some of them (the only problem is the `ListView`) ``` <?xml version="1.0" encoding="utf-8"?> <LinearL...
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- 28 Oct at 07:13
Run ssh and immediately execute command
I'm trying to find UNIX or bash command to run a command after connecting to an ssh server. For example: ``` ssh name@ip "tmux list-sessions" ``` The above code works, it lists the sessions, but i...
Delete files older than 15 days using PowerShell
I would like to delete only the files that were created more than 15 days ago in a particular folder. How could I do this using PowerShell?
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- 16 Jun at 08:49
AngularJS toggle class using ng-class
I am trying to toggle the class of an element using `ng-class` ``` <button class="btn"> <i ng-class="{(isAutoScroll()) ? 'icon-autoscroll' : 'icon-autoscroll-disabled'}"></i> </button> ``` isAuto...
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- 3 Oct at 16:37
How to read a text file into a list or an array with Python
I am trying to read the lines of a text file into a list or array in python. I just need to be able to individually access any item in the list or array after it is created. The text file is formatt...