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PhoneGap: Detect if running on desktop browser
...r or not, here is another great option:
var app = document.URL.indexOf( 'http://' ) === -1 && document.URL.indexOf( 'https://' ) === -1;
if ( app ) {
// PhoneGap application
} else {
// Web page
}
as seen here: Detect between a mobile browser or a PhoneGap application
...
What is the difference between char array and char pointer in C?
...ession of type char[] is provided where one of type char* is expected, the compiler automatically converts the array into a pointer to its first element.
Your example function printSomething expects a pointer, so if you try to pass an array to it like this:
char s[10] = "hello";
printSomething(s);...
How to parse the AndroidManifest.xml file inside an .apk package
...om the Android SDK, into a Python (or whatever) script?
Through the aapt (http://elinux.org/Android_aapt), indeed, you can retrieve information about the .apk package and about its AndroidManifest.xml file. In particular, you can extract the values of individual elements of an .apk package through ...
Get name of caller function in PHP?
...ll, or specify: "class", "function", "line", "class", etc.) - options see: http://php.net/manual/en/function.debug-backtrace.php
*/
function getCaller($what = NULL)
{
$trace = debug_backtrace();
$previousCall = $trace[2]; // 0 is this call, 1 is call in previous function, 2 is caller of tha...
Differences between Agda and Idris
...wer this, as having implemented Idris I'm probably a bit biased! The FAQ - http://docs.idris-lang.org/en/latest/faq/faq.html - has something to say on it, but to expand on that a bit:
Idris has been designed from the ground up to support general purpose programming ahead of theorem proving, and as...
What is the difference between call and apply?
...is slightly faster than .apply. I can't tell you exactly why.
See jsPerf, http://jsperf.com/test-call-vs-apply/3
[UPDATE!]
Douglas Crockford mentions briefly the difference between the two, which may help explain the performance difference... http://youtu.be/ya4UHuXNygM?t=15m52s
Apply takes an...
What are the differences between poll and select?
...usands of connections at once. This is a good introduction to the effort:
http://scotdoyle.com/python-epoll-howto.html
While this link has some nice graphs showing the benefits of epoll() (you will note that select() is by this point considered so inefficient and old-fashioned that it does not eve...
How do I check whether a jQuery element is in the DOM?
...support and to shave the constant factors to minimum.
As seen also here - http://jsperf.com/jquery-element-in-dom/28 - the code would look like this:
var isElementInDOM = (function($) {
var docElt = document.documentElement, find,
contains = docElt.contains ?
function(elt) { return...
What is sharding and why is it important?
... copies, then read the total. An example of this "sharded counter wrt GAE: http://code.google.com/appengine/articles/sharding_counters.html
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foll...
Rails where condition using NOT NIL
...t's easy:
Foo.includes(:bar).where.not(bars: {id: nil})
See also:
http://guides.rubyonrails.org/active_record_querying.html#not-conditions
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