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How to test multiple variables against a value?
...st, tuples are faster than sets so long as the size of the tuple is around 4-8 elements. If you have to scan more than that, use a set, but if you are looking for an item out of 2-4 possibilities, a tuple is still faster! If you can arrange for the most likely case to be first in the tuple, the wi...
What's the fastest way to convert String to Number in JavaScript?
...
There are 4 ways to do it as far as I know.
Number(x);
parseInt(x, 10);
parseFloat(x);
+x;
By this quick test I made, it actually depends on browsers.
http://jsperf.com/best-of-string-to-number-conversion/2
Implicit marked the fas...
How to verify multiple method calls with different params
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answered Dec 14 '11 at 14:10
BradBrad
13.4k99 gold badges5252 silver badges6969 bronze badges
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How to change Rails 3 server default port in develoment?
On my development machine, I use port 10524. So I start my server this way :
9 Answers
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Programmer Puzzle: Encoding a chess board state throughout a game
...nly specifies the minimal information necessary. Consider this opening:
e4 e5
Nf3 Nc6
…
which translates to:
White moves king’s pawn from e2 to e4 (it is the only piece that can get to e4 hence “e4”);
Black moves the king’s pawn from e7 to e5;
White moves the knight (N) to f3;
Black ...
How do I extract a sub-hash from a hash?
...in other answers, but to sum them in one place:
x = {a: 1, b: 2, c: 3, d: 4}
# => {:a=>1, :b=>2, :c=>3, :d=>4}
x.slice(:a, :b)
# => {:a=>1, :b=>2}
x
# => {:a=>1, :b=>2, :c=>3, :d=>4}
x.except(:a, :b)
# => {:c=>3, :d=>4}
x
# => {:a=>1, :b=>...
Why use the yield keyword, when I could just use an ordinary IEnumerable?
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241
Using yield makes the collection lazy.
Let's say you just need the first five items. Your way...
Rolling or sliding window iterator?
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124
There's one in an old version of the Python docs with itertools examples:
from itertools import...
Maximum length of the textual representation of an IPv6 address?
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45 characters.
You might expect an address to be
0000:0000:0000:0000:0000:0000:0000:0000
8 * 4 + 7 = 39
8 groups of 4 digits with 7 : between them.
But if you have an IPv4-mapped IPv6 address, the last two groups ca...
JS Client-Side Exif Orientation: Rotate and Mirror JPEG Images
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146
The github project JavaScript-Load-Image provides a complete solution to the EXIF orientation p...