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All falsey values in JavaScript
...s of length 0
null
undefined
NaN
document.all (in HTML browsers only)
This is a weird one. document.all is a falsey object, with typeof as undefined. It was a Microsoft-proprietory function in IE before IE11, and was added to the HTML spec as a "willful violation of the JavaScript specification" ...
Prevent linebreak after
Is there a way to prevent a line break after a div with css?
13 Answers
13
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How to execute Python scripts in Windows?
... you need to know two things about how Windows invokes the program. First is to find out what kind of file Windows thinks it is:
C:\>assoc .py
.py=Python.File
Next, you need to know how Windows is executing things with that extension. It's associated with the file type "Python.File...
Best way to repeat a character in C#
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What about this:
string tabs = new String('\t', n);
Where n is the number of times you want to repeat the string.
Or better:
static string Tabs(int n)
{
return new String('\t', n);
}
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How to leave/exit/deactivate a Python virtualenv
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edited Nov 26 '19 at 16:19
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Transpose/Unzip Function (inverse of zip)?
I have a list of 2-item tuples and I'd like to convert them to 2 lists where the first contains the first item in each tuple and the second list holds the second item.
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jquery select change event get selected option
I bound an event on the change event of my select elements with this:
9 Answers
9
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C# 4.0 optional out/ref arguments
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As already mentioned, this is simply not allowed and I think it makes a very good sense.
However, to add some more details, here is a quote from the C# 4.0 Specification, section 21.1:
Formal parameters of constructors, methods, indexers and del...
PHPUnit: assert two arrays are equal, but order of elements not important
What is a good way to assert that two arrays of objects are equal, when the order of the elements in the array is unimportant, or even subject to change?
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JavaScript math, round to two decimal places [duplicate]
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NOTE - See Edit 4 if 3 digit precision is important
var discount = (price / listprice).toFixed(2);
toFixed will round up or down for you depending on the values beyond 2 decimals.
Example: http://jsfiddle.net/calder12/tv9HY/
Documentation: https://developer...