ecmascript-5

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ECMAScript Associative Array via Object w/ prototype null?

I see a lot of people doing this Object.prototype.foo = \'HALLO\'; var hash = {baz: \'quuz\'}; for ( var v in hash ) {[详细]

2023-03-09 02:30 分类：问答
When will v8 implement ECMAScript 5?

I noticed that v8 is rather mute on the issue of ECMAScript 5th edition. V8 implements ECMAScript as specified in ECMA-262, 3rd edition, and runs on Windows XP and Vista, Mac OS X 10.5 (Leopard), an[详细]

2023-03-08 15:41 分类：问答
variable.Property = "test" vs Object.defineProperty(variable,"Property")

If I want to give a variable a a property P (non-accessor property) and I do not care if it\'s configurable/enumerable/writable.[详细]

2023-03-08 14:15 分类：问答
Make a simple search algorithm more elegant

// temp data var array = [1,2,function() { }, 3, function() { }]; var cb = function() { console.log(\"foo\"); }[详细]

2023-03-06 19:58 分类：问答
JavaScript: Testing variables for undefined value; testing whether object is array

Is there a difference between typeof value === \"undefined开发者_高级运维\" and value === undefined?[详细]

2023-03-06 12:03 分类：问答
JavaScript: Strict mode and anonymous functions

Nearly all my JS files are wrapped in anonymous functions. If I include \"use strict\"; outside the anonymous f开发者_开发知识库unction, is strict mode still applied to the anonymous function?[详细]

2023-03-06 02:13 分类：问答
Is there anyway to have instances share the same function yet at the same time have private variables?

I have this piece of code: var Human=function(name){ this._name=name; }; Human.prototype.Shout=function(){[详细]

2023-03-06 01:09 分类：问答
Javascript get and set availability in browsers

Which browsers do not support t开发者_Go百科he get and set methods for object prototypes? I believe this is a feature of ES5, an I know it works in Chrome, but I am wondering if it is safe to use for[详细]

2023-03-05 22:45 分类：问答
why do we use `Boy.prototype = new Human;` to simulate inheritance?

i don\'t get why everyone i开发者_运维百科s using Boy.prototype = new Human; to simulate inheritance. Look, what we want is the function\'s of A right? we can do that without instantiating a new A (in[详细]

2023-03-05 10:37 分类：问答
any higher-level language that writes out javascript?

I\'m looking for a higher-level language that writes out javascript. in other words the relation of this language to javascript is similar to the relation C++ have with assembly code.[详细]

2023-03-05 10:31 分类：问答