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Is this a “good enough” random algorithm; why isn't it used if it's faster?
I made a class called QuickRandom , and its job is to produce random numbers quickly. It's really simple: just take the old value, multiply by a double , and take the decimal part.
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relative path in require_once doesn't work
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Note that you should manually include the trailing slash in after __DIR__. So: require_once(__DIR__.'/../class/user.php'); Per the documentation, the trailing slash is omitted except for the root directory.
– Ariel Allon
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What is a 'Closure'?
... scope
When you declare a local variable, that variable has a scope. Generally, local variables exist only within the block or function in which you declare them.
function() {
var a = 1;
console.log(a); // works
}
console.log(a); // fails
If I try to access a local variable, most languag...
How do I find the most recent git commit that modified a file?
...ts looking at the history of specific files (and directories), so you can call it like this:
git log my/file.c
If you really only want to list the one most recent commit, for example to use it in a script, use the -n 1 option:
git log -n 1 --pretty=format:%H -- my/file.c
--pretty=format:%h tel...
Ruby, Difference between exec, system and %x() or Backticks
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system
The system method calls a system program. You have to provide the command as a string argument to this method. For example:
>> system("date")
Wed Sep 4 22:03:44 CEST 2013
=> true
The invoked program will use the current STDIN, STDO...
What does the -ObjC linker flag do?
...braries that contain categories on existing classes.
From this Technical Q&A
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How do I get started with Node.js [closed]
...with Ryan Dahl
Node.js: Asynchronous Purity Leads to Faster Development
Parallel Programming with Node.js
Server-side JavaScript with Node, Connect & Express
Node.js First Look
Node.js with MongoDB
Ryan Dahl's Google Tech Talk
Real Time Web with Node.js
Node.js Tutorials for Beginners
Pluralsigh...
Setting different color for each series in scatter plot on matplotlib
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I don't know what you mean by 'manually'. You can choose a colourmap and make a colour array easily enough:
import numpy as np
import matplotlib.pyplot as plt
import matplotlib.cm as cm
x = np.arange(10)
ys = [i+x+(i*x)**2 for i in range(10)]
colors = cm.ra...
Test for non-zero length string in Bash: [ -n “$var” ] or [ “$var” ]
...t, I'll use [ ! "$var" ] instead of [ -z "$var" ].
– AllenHalsey
Oct 6 '10 at 20:32
2
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Convert an image to grayscale in HTML/CSS
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For posterity: @TomAuger, this Q&A has specific instructions for IE10.
– Barney
Sep 25 '14 at 10:32
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