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RegEx to parse or validate Base64 data
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edited Jan 24 '09 at 0:50
answered Jan 24 '09 at 0:40
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Why does parseInt yield NaN with Array#map?
...,'2','3'].map(function(num) { return parseInt(num, 10); });
or with ES2015+ syntax:
['1','2','3'].map(num => parseInt(num, 10));
(In both cases, it's best to explicitly supply a radix to parseInt as shown, because otherwise it guesses the radix based on the input. In some older browsers, a l...
Keep only first n characters in a string?
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547
You are looking for JavaScript's String method substring
e.g.
'Hiya how are you'.substring(0...
Why does Math.round(0.49999999999999994) return 1?
In the following program you can see that each value slightly less than .5 is rounded down, except for 0.5 .
5 Answers
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Best way to find the intersection of multiple sets?
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465
From Python version 2.6 on you can use multiple arguments to set.intersection(), like
u = set.i...
Concatenate two slices in Go
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+500
Add dots after the second slice:
//---------------------------vvv
append([]int{1,2}, []int{3,4}...)
This is just like any other...
How do I retrieve the number of columns in a Pandas data frame?
...as pd
df = pd.DataFrame({"pear": [1,2,3], "apple": [2,3,4], "orange": [3,4,5]})
len(df.columns)
3
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How to concatenate and minify multiple CSS and JavaScript files with Grunt.js (0.3.x)
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Get the week start date and week end date from week number
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