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Javascript Equivalent to C# LINQ Select
... object literal based solutions when filtering 1-2 properties, and pass a callback function for more complex filtering.
I'll end this with 2 general tips when adding methods to native object prototypes:
Check for occurrence of existing methods before overwriting e.g.:
if(!Array.prototype.where) ...
Creating an empty file in Ruby: “touch” equivalent?
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If you are worried about file handles:
File.open("foo.txt", "w") {}
From the docs:
If the optional code block is given, it will be passed the opened file
as an argument, and the File object will automatically be closed when
the block terminates.
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Converting from a string to boolean in Python?
...ly', 'uh-huh']
Be cautious when using the following:
>>> bool("foo")
True
>>> bool("")
False
Empty strings evaluate to False, but everything else evaluates to True. So this should not be used for any kind of parsing purposes.
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Templated check for the existence of a class member function?
... Although, I used the following for 'one' and 'two': typedef char Small; class Big{char dummy[2];} to ensure no ambiguity about platform dependent variable size.
– user23167
Nov 2 '08 at 21:40
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What's the nearest substitute for a function pointer in Java?
...want to create more methods that do exactly the same thing, except for a small calculation that's going to change one line of code. This is a perfect application for passing in a function pointer to replace that one line, but Java doesn't have function pointers. What's my best alternative?
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Return two and more values from a method
... an implicit return by explicitly putting the return values in a list: def foo_and_bar; ['foo', 'bar']; end
– Dennis
Dec 9 '14 at 13:06
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The constant cannot be marked static
...n the referenced assembly changes, your assembly will still have the originally compiled-in value.
If this behavior is not acceptable, then you should consider making the field a public static readonly field.
Lib.dll, provided as binary:
public class Foo {
public const int HATS = 42;
publ...
Why can't Python's raw string literals end with a single backslash?
Technically, any odd number of backslashes, as described in the documentation .
12 Answers
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How to remove all white space from the beginning or end of a string?
How can I remove all white space from the beginning and end of a string?
6 Answers
6
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Enforcing the type of the indexed members of a Typescript object?
...ore a mapping of string -> string in a Typescript object, and enforce that all of the keys map to strings. For example:
8 ...