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In Ruby how do I generate a long string of repeated text?
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310
str = "0" * 999999
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iOS UIImagePickerController result image orientation after upload
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What does (x ^ 0x1) != 0 mean?
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The XOR operation (x ^ 0x1) inverts bit 0. So the expression effectively means: if bit 0 of x is 0, or any other bit of x is 1, then the expression is true.
Conversely the expression is false if x == 1.
So the test is the same as:
if (x != 1)
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Regex for string not ending with given suffix
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How to check with javascript if connection is local host?
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if (location.hostname === "localhost" || location.hostname === "127.0.0.1")
alert("It's a local server!");
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What's the simplest way to test whether a number is a power of 2 in C++?
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190
(n & (n - 1)) == 0 is best. However, note that it will incorrectly return true for n=0, so i...
Is there a performance gain in using single quotes vs double quotes in ruby?
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$ ruby -v
ruby 1.9.3p0 (2011-10-30 revision 33570) [x86_64-darwin11.0.0]
$ cat benchmark_quotes.rb
# As of Ruby 1.9 Benchmark must be required
require 'benchmark'
n = 1000000
Benchmark.bm(15) do |x|
x.report("assign single") { n.times do; c =...
How to host a Node.Js application in shared hosting [closed]
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You can run node.js server on a typical shared hosting with Linux, Apache and PHP (LAMP). I hav...
How to nicely format floating numbers to String without unnecessary decimal 0?
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407
If the idea is to print integers stored as doubles as if they are integers, and otherwise print...
A weighted version of random.choice
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Since version 1.7.0, NumPy has a choice function that supports probability distributions.
from numpy.random import choice
draw = choice(list_of_candidates, number_of_items_to_pick,
p=probability_distribution)
Note that probabi...