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How to swap keys and values in a hash
...was inverted (in essence, by letting you access keys through values):
{a: 1, b: 2, c: 3}.key(1)
=> :a
If you want to keep the inverted hash, then Hash#invert should work for most situations:
{a: 1, b: 2, c: 3}.invert
=> {1=>:a, 2=>:b, 3=>:c}
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If you have duplicate values,...
Get the last non-empty cell in a column in Google Sheets
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Does JavaScript have a method like “range()” to generate a range within the supplied bounds?
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How to know if two arrays have the same values
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function arraysEqual(_arr1, _arr2) {
if (!Array.isArray(_arr1) || ! Array.isArray(_arr2) || _arr1.length !== _arr2.length)
return false;
var arr1 = _arr1.concat().sort();
var arr2 = _arr2.concat().sort();
for (var i = 0; i &l...
How to get indices of a sorted array in Python
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How can I add a help method to a shell script?
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177
here's an example for bash:
usage="$(basename "$0") [-h] [-s n] -- program to calculate the an...
How to find the JVM version from a program?
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Why does Eclipse complain about @Override on interface methods?
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What is the difference between return and return()?
I tested the above code in Chrome's console, and both returned 1 .
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