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What is the “double tilde” (~~) operator in JavaScript? [duplicate]
...y large numbers (the result of dividing numbers from the Navigation Timing API by 62 during base-62 encoding). For instance, in Firefox, Chrome and IE, ~~(2419354838.709677) == -1875612458, whereas Math.floor(2419354838.709677) == 2419354838.
– Jacob Wan
Jul 12...
Is PHP's count() function O(1) or O(n) for arrays?
...m_elements() for non-recursive array, which is implemented this way:
ZEND_API int zend_hash_num_elements(const HashTable *ht)
{
IS_CONSISTENT(ht);
return ht->nNumOfElements;
}
So you can see, it's O(1) for $mode = COUNT_NORMAL.
...
Preloading CSS Images
...hen the browser is idle, which is determined by the nsIWebProgressListener API. See this for more info.
– Matthew Beckman
Jan 22 '17 at 8:00
1
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How to develop or migrate apps for iPhone 5 screen resolution?
... height of [[UIScreen mainScreen] bounds] as there seems to be no specific API for that. As of iOS 8 there are also size classes that abstract screen sizes into regular or compact vertically and horizontally and are recommended way to adapt your UI.
...
Copy folder recursively in node.js
...them yet, but it should work to just replace them. (See https://nodejs.org/api/fs.html#fs_fs_copyfilesync_src_dest_flags)
var fs = require('fs');
var path = require('path');
function copyFileSync( source, target ) {
var targetFile = target;
//if target is a directory a new file with the ...
Does setWidth(int pixels) use dip or px?
...Dimension() does. I considered posting that, but I like going through the API in case anything ever changes... though I guess it's safe to use that method if you give it the okay. :)
– Dan Lew
Mar 9 '10 at 5:15
...
Is it possible to select the last n items with nth-child?
...are willing to include it you can call nth-last-child through its selector API (this is this simulated it will cross browser). Here is a link to an nth-last-child plugin. If you took this method of targeting the elements you were interested in:
$('ul li:nth-last-child(1)').addClass('last');
And ...
Routes with Dash `-` Instead of Underscore `_` in Ruby on Rails
... work in Rails 5).
Using :path as shown above is better.
# Using private APIs is not recommended and may break in future Rails versions.
# https://github.com/rails/rails/blob/4-1-stable/actionpack/lib/action_dispatch/routing/mapper.rb#L1012
#
# config/initializers/adjust-route-paths.rb
module Acti...
Async/Await vs Threads
... C# aspect what's the best approach to achieve Async-Callbacks on external APIs?
– bonCodigo
May 19 '14 at 5:13
5
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How to do a scatter plot with empty circles in Python?
...t with errorbars but it works for markers in general
http://matplotlib.org/api/_as_gen/matplotlib.axes.Axes.errorbar.html
fillstyle accepts the following values: [‘full’ | ‘left’ | ‘right’ | ‘bottom’ | ‘top’ | ‘none’]
There are two important things to keep in mind when usin...