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PHP: Storing 'objects' inside the $_SESSION
...ssion objects. Whenever the server gets a request, it looks up the Session info out of its hashtable of session objects based on the ID the client submitted with the request. All this extra work is a double whammy on scalability (a big reason HTTP is stateless).
Whammy One: It reduces the work a s...
Objective-C declared @property attributes (nonatomic, copy, strong, weak)
...trials and tribulations writing your own one.
It latter case look at "lock-free", "wait-free" paradigms. Looks like rocket-science at a first glance, but could help you achieving fantastic performance in comparison to "usual locking".
...
Resizing an image in an HTML5 canvas
...thumbnailer(canvas, img, 188, 3); //this produces lanczos3
// but feel free to raise it up to 8. Your client will appreciate
// that the program makes full use of his machine.
document.body.appendChild(canvas);
};
Now it's time to pit your best browsers out there and see which one will...
Where are an UIWebView's cookies stored?
...ng this in a category. Here's what I ended up using:
NSHTTPCookieStorage+Info.h
#import <Foundation/Foundation.h>
@interface NSHTTPCookieStorage (Info)
+ (NSDictionary*) describeCookies;
+ (NSDictionary *) describeCookie:(NSHTTPCookie *)cookie;
@end
NSHTTPCookieStorage.m
@implementati...
Difference between variable declaration syntaxes in Javascript (including global variables)?
...lt;script src="external.js"></script>
/* external.js */
console.info(varDeclaration == true); // could be .log, alert etc
// returns false in IE8
console.info(noVarDeclaration == true); // could be .log, alert etc
// returns false in IE8
console.info(window.hungOnWindow == true); // cou...
Declaring variables inside loops, good practice or bad practice?
...ay even be possible that the variable is not allocated, just re-using some free slot (from other variable whose scope has ended).
With restricted and more precise scope come more accurate optimizations. But more importantly, it makes your code safer, with less states (i.e. variables) to worry about...
Is onload equal to readyState==4 in XMLHttpRequest?
...ById('log').innerHTML += msg + "<br/>";
}
function log(xhr, evType, info) {
var evInfo = evType;
if (info)
evInfo += " - " + info ;
evInfo += " - readyState: " + xhr.readyState + ", status: " + xhr.status;
logText(evInfo);
}
function selected(radio) {
document.get...
Parse JSON in C#
...pedia.org"",""title"":""\u003cb\u003eCheese\u003c/b\u003e - Wikipedia, the free encyclopedia"",""titleNoFormatting"":""Cheese - Wikipedia, the free encyclopedia"",""content"":""\u003cb\u003eCheese\u003c/b\u003e is a food consisting of proteins and fat from milk, usually the milk of cows, buffalo, ...
e.printStackTrace equivalent in python
...rent exception. See http://docs.python.org/library/traceback.html for more information.
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Setting git parent pointer to a different parent
...sm (see definition of Git grafts in Git Glossary and documentation of .git/info/grafts file in Git Repository Layout documentation) to change parent of a commit, check that it did correct thing with some history viewer (gitk, git log --graph, etc.) and then use git filter-branch (as described in "Ex...