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Boolean literals in PowerShell
...$false.
Those are constants, though. There are no language-level literals for booleans.
Depending on where you need them, you can also use anything that coerces to a boolean value, if the type has to be boolean, e.g. in method calls that require boolean (and have no conflicting overload), or condi...
How do I change column default value in PostgreSQL?
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'SET' is forgotten
ALTER TABLE ONLY users ALTER COLUMN lang SET DEFAULT 'en_GB';
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How do I edit the Visual Studio templates for new C# class/interface?
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Extract, edit and recompress. Paths are for the class template, but the interface templates are in the same folder.
You may want to edit the VS template file in each to remove the fact that they don't automatically add references to the assemblies System, System.D...
How to use mod operator in bash?
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Try the following:
for i in {1..600}; do echo wget http://example.com/search/link$(($i % 5)); done
The $(( )) syntax does an arithmetic evaluation of the contents.
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Reading header data in Ruby on Rails
I am making an API where in the access token for Facebook login will be sent in through header data.
3 Answers
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what does npm -D flag mean?
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The -D flag is the shortcut for: --save-dev. Source: https://docs.npmjs.com/cli/install
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Python regular expressions return true/false
...ects are always true, and None is returned if there is no match. Just test for trueness.
if re.match(...):
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Can I add comments to a pip requirements file?
I'd like to add comments for a few packages in a pip requirements file. (Just to explain why that package is on the list.) Can I do this?
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Precedence and bitmask operations
...10 & (0b01 == 0) why would someone apply bitwise with yes no kind of information.
– Grijesh Chauhan
Feb 24 '14 at 10:35
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Get int value from enum in C#
...the enum, e.g.
int something = (int) Question.Role;
The above will work for the vast majority of enums you see in the wild, as the default underlying type for an enum is int.
However, as cecilphillip points out, enums can have different underlying types.
If an enum is declared as a uint, long, o...