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What is the ultimate postal code and zip regex?
...s, some can contain spaces, others dots, the number of characters can vary from two to at least six...
What you could do (theoretically) is create a seperate regex for every country in the world, not recommendable IMO. But you would still be missing on the validation part: Zip code 12345 may exist,...
Remove all the elements that occur in one list from another
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This will also remove duplicates from l1, which may be an undesired side effect.
– kindall
Nov 18 '10 at 4:43
39
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how does multiplication differ for NumPy Matrix vs Array classes?
... rules of linear algebra
some code snippets to illustrate:
>>> from numpy import linalg as LA
>>> import numpy as NP
>>> a1 = NP.matrix("4 3 5; 6 7 8; 1 3 13; 7 21 9")
>>> a1
matrix([[ 4, 3, 5],
[ 6, 7, 8],
[ 1, 3, 13],
[ 7, 21, 9...
Delete specific line number(s) from a text file using sed?
I want to delete one or more specific line numbers from a file. How would I do this using sed?
6 Answers
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How to get an array of unique values from an array containing duplicates in JavaScript? [duplicate]
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Edited
ES6 solution:
[...new Set(a)];
Alternative:
Array.from(new Set(a));
Old response. O(n^2) (do not use it with large arrays!)
var arrayUnique = function(a) {
return a.reduce(function(p, c) {
if (p.indexOf(c) < 0) p.push(c);
return p;
}, []);
};
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Restore file from old commit in git
...ld commit that I did a few weeks ago. I want to restore only a single file from that commit. What do I do?
4 Answers
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Git pull from another repository
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In order to pull a particular branch from different repo you can use the below git command.
git pull <git_url> <branch> --allow-unrelated-histories
share
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Create a File object in memory from a string in Java
...d add that the String data don't exist in a file (so I cannot read my data from a file).
5 Answers
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JavaScript “new Array(n)” and “Array.prototype.map” weirdness
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From MDC (emphasis mine): "map calls a provided callback function once for each element in an array, in order, and constructs a new array from the results. callback is invoked only for indexes of the array which have assigned...
Accessing attributes from an AngularJS directive
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See section Attributes from documentation on directives.
observing interpolated attributes: Use $observe to observe the value changes of attributes that contain interpolation (e.g. src="{{bar}}"). Not only is this very efficient but it's also t...