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Return value in a Bash function
...t should provide data cannot also echo other stuff to stdout, because the caller using $() will receive that too and get confused or have to parse the output. Global variables are not great because it's just a matter of time before you use the same global var in two places that happen to be nested a...
Why and when to use Node.js? [duplicate]
...
It's evented asynchronous non-blocking I/O build ontop of V8.
So we have all the performance gain of V8 which is the Google JavaScript interpreter. Since the JavaScript performance race hasn't ended yet, you can expect Google to constantly update performance on V8 (for free).
We have non-blocking...
Android: Vertical ViewPager [closed]
Is there a way to make a ViewPager that does not scroll horizontally, but vertically?!
15 Answers
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Node.js spawn child process and get terminal output live
...n command that Node.js can resolve against your system path.
1. Provide a callback to process the buffered output:
var child = require('child_process').execFile('path/to/script', [
'arg1', 'arg2', 'arg3',
], function(err, stdout, stderr) {
// Node.js will invoke this callback when process...
Why are Standard iterator ranges [begin, end) instead of [begin, end]?
...ou have any sort of algorithm that deals with multiple nested or iterated calls to range-based constructions, which chain naturally. By contrast, using a doubly-closed range would incur off-by-ones and extremely unpleasant and noisy code. For example, consider a partition [n0, n1)[n1, n2)[n2,n3). An...
Rails Model, View, Controller, and Helper: what goes where?
...summarized) by the Model, or generated from the Controller. If your View really needs to do processing that can't be done by the Model or Controller, put the code in a Helper. Lots of Ruby code in a View makes the pages markup hard to read.
Model: Your model should be where all your code that rela...
How to escape special characters in building a JSON string?
...Tab
\" Double quote
\\ Backslash character
However, even if it is totally contrary to the spec, the author could use \'.
This is bad because :
It IS contrary to the specs
It is no-longer JSON valid string
But it works, as you want it or not.
For new readers, always use a double quote...
What's the difference between ng-model and ng-bind
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@Marc Actually ng-bind binds the text content of the element, not its value. Because of this, it can't be used in <input> elements.
– trogdor
Aug 14 '13 at 19:57
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Locate the nginx.conf file my nginx is actually using
...g on a client's server where there are two different versions of nginx installed. I think one of them was installed with the brew package manager (its an osx box) and the other seems to have been compiled and installed with the nginx packaged Makefile. I searched for all of the nginx.conf files on t...
Most efficient way to concatenate strings in JavaScript?
...once.
is wrong, because it's based on a flawed test. That test never actually appends into the DOM.
This fixed test shows that creating the string all at once before rendering it is much, MUCH faster. It's not even a contest.
(Sorry this is a separate answer, but I don't have enough rep to comme...