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What is the fastest or most elegant way to compute a set difference using Javascript arrays?
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if don't know if this is most effective, but perhaps the shortest
A = [1, 2, 3, 4];
B = [1, 3, 4, 7];
diff = A.filter(function(x) { return B.indexOf(x) < 0 })
console.log(diff);
Updated to ES6:
A = [1, 2, 3, 4];
B = [1, 3, 4, ...
How To: Best way to draw table in console app (C#)
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Edit: thanks to @superlogical, you can now find and improve the following code in github!
I wrote this class based on some ideas here. The columns width is optimal, an it can handle object arrays with this simple API:
static void Main(string[] args)
{
IEnume...
Why are there no ++ and -- operators in Python?
...++" as "x += 1, evaluating to the previous binding of x".
If you want to know the original reason, you'll have to either wade through old Python mailing lists or ask somebody who was there (eg. Guido), but it's easy enough to justify after the fact:
Simple increment and decrement aren't needed as ...
Mysql - How to quit/exit from stored procedure
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@jlh it was wrong (text corrected now) in that I didn’t know about mysql’s label technique, but the code isn’t wrong - it will work, on any DB actually.
– Bohemian♦
Nov 21 '18 at 14:53
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Best database field type for a URL
... indexing and search is done efficiently, like oracle did...wait, mysql is now oracle's... download.oracle.com/docs/cd/B10464_05/web.904/b12099/…
– redben
Mar 26 '11 at 14:20
81...
How do I show a Save As dialog in WPF?
...nked to the wrong version. I've updated my answer to point the correct one now.
– Twelve47
Apr 11 '11 at 14:50
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Can an ASP.NET MVC controller return an Image?
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For those that are coming into this question now, this was the solution that worked best for me.
– Clarence Klopfstein
Dec 25 '09 at 5:09
179
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How do I pipe a subprocess call to a text file?
RIght now I have a script that I run. When I run it and it hits this line, it starts printing stuff because run.sh has prints in it.
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Check if an array contains any element of another array in JavaScript
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For now, it might be best to avoid using includes, as apparently it is not supported in IE: stackoverflow.com/questions/36574351/…
– Shafique Jamal
Mar 3 '18 at 2:04
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Is there a way to rename an Xcode 4 scheme?
...dow like this:
Select the scheme you want to change, and hit Return.
Now the scheme name will be editable, and you can change it to your hearts desire. Then hit Return again to save it.
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