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Principal component analysis in Python
...de. 13 years after its first public release, MDP has reached full maturity and no new features are planned in the future.
– Gabriel
Oct 5 '16 at 18:42
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What's the difference between the various methods to get a Context?
In various bits of Android code I've seen:
8 Answers
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What does “O(1) access time” mean?
...een this term "O(1) access time" used to mean "quickly" but I don't understand what it means. The other term that I see with it in the same context is "O(n) access time". Could someone please explain in a simple way what these terms mean?
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Proxy with express.js
...api/BLABLA to another server, for example other_domain.com:3000/BLABLA , and return to user the same thing that this remote server returned, transparently.
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How to find out if an installed Eclipse is 32 or 64 bit version?
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Hit Ctrl+Alt+Del to open the Windows Task manager and switch to the processes tab.
32-bit programs should be marked with *32.
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Check synchronously if file/directory exists in Node.js
...version of lstat, etc.
lstatSync tells you both whether something exists, and if so, whether it's a file or a directory (or in some file systems, a symbolic link, block device, character device, etc.), e.g. if you need to know if it exists and is a directory:
var fs = require('fs');
try {
// Q...
Why does PHP 5.2+ disallow abstract static class methods?
After enabling strict warnings in PHP 5.2, I saw a load of strict standards warnings from a project that was originally written without strict warnings:
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Math.random() versus Random.nextInt(int)
What is the difference between Math.random() * n and Random.nextInt(n) where n is an integer?
4 Answers
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What do you call the -> operator in Ruby?
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In Ruby Programming Language ("Methods, Procs, Lambdas, and Closures"), a lambda defined using -> is called lambda literal.
succ = ->(x){ x+1 }
succ.call(2)
The code is equivalent to the following one.
succ = lambda { |x| x + 1 }
succ.call(2)
Informally, I have heard...
Realistic usage of the C99 'restrict' keyword?
I was browsing through some documentation and questions/answers and saw it mentioned. I read a brief description, stating that it would be basically a promise from the programmer that the pointer won't be used to point somewhere else.
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