So Safari and Chrome have started in their betas to implement some ES5 stuff. For instance Object.create is in them. Do any of you know if there is a website that shows the progress made in the browsers? ATM i need to use Object.freeze, and wanted to see which browsers (if any) supported that yet. ...
I've been looking for some information regarding the scrapped ECMAScript 4th Edition without much success, even on SO. I know Mozilla's JavaScript 1.7 implemented many (all?) of the new features offered in 4th Edition and I thought I remembered a good John Resig post on it but I can't seem to find it on his blog now. In particularly, I...
What scope does the strict mode pragma have in ECMAScript5? "use strict"; I'd like to do this (mainly because JSLint doesn't complain about it): "use strict"; (function () { // my stuff here... }()); But I'm not sure if that would break other code or not. I know that I can do this, which will scope the pragma to the function... ...
Possible Duplicate: Javascript: use strict Is there any way to know how and which browsers support it? ...
Namespaces were once a consideration for ECMAScript (the old ECMAScript 4) but were taken out. As Brendan Eich says in this message: One of the use-cases for namespaces in ES4 was early binding (use namespace intrinsic), both for performance and for programmer comprehension -- no chance of runtime name binding disagreei...
Hi, As per http://www.ecma-international.org/publications/files/ECMA-ST/ECMA-262.pdf, JavaScript has 6 types: undefined, null, boolean, string, number and object. var und; console.log(typeof und); // <-- undefined var n = null; console.log(typeof n); // <--- **object**! var b = true; console.log(typeof b); // <-- boolean var str = "...
Hi Newcomer to Objective C and trying to translate concepts and sytax I know from ecmascript based languages to Objective C. Is it proper to think of the .h header file in ObjectiveC as an Interface in Actionscript? Lets take the following code example in Objective C which calls a method containing 2 arguments [myTextObject setString:...
Hi, I am reading ECMAScript Language Specification Function Calls section Can someone rephrase or detailed explains the following sentense for me? The production CallExpression : MemberExpression Arguments is evaluated as follows: Evaluate MemberExpression. let's take this code as an example. var john = { name:...
I have been studying the ECMAScript specification and have found that it is extremely hard to read and understand. I constantly have to backtrack to keep concepts in my head. When reading the C# specification I am able to study components of the language without constantly moving around the document. ECMAScript Specification C# Specifi...
Going thru the excellent Apress books on Objective C. To help in my undertanding, I try and recode any Ojective C code samples in Java/Action-script. One common structure in method calls in ObjC leaves me a bit puzzled. -(id) initWithPressure: (float) pressure treadDepth: (float) treadDepth; (in ECMAscript)Would this be most sim...
I've been working on my own implementation of ECMAScript for quite some time now. I have basically done everything by hand to help gain a deep understanding of the process. Repeated attempts to analyze and understand this portion of the grammar have failed so I've been working on other portions of the project but now I am at a point were...
After some resent tests I have found my implementation cannot handle very much recursion. Although after I ran a few tests in Firefox I found that this may be more common than I originally thought. I believe the basic problem is that my implementation requires 3 calls to make a function call. The first call is made to a method named Call...
Hi Folks, Can someone tell me since which ECMA version the IN operator is available and which browsers (versions) support it ? Explanation: The IN-operator can be used like the following: var myObject = { Firstname: 'Foo', Lastname: 'Bar' }; if('Lastname' in myObject){ // Lastname is an attribute of myObject } ...
I have been working on an ECMAScript implementation and I am currently working on polishing up the project. As a part of this, I have been writing tests like the following: [TestMethod] public void ArrayReduceTest() { var engine = new Engine(); var request = new ExecScriptRequest(@" var a = [1, 2, 3, 4, 5]; a.red...
I cannot for the life of me figure out why Alternative is left recursive. It really throws a wrench into my parser. Alternative :: [empty] Alternative Term Here is a note in the semantics portion of the spec that is not exactly clear. Maybe the reasoning would be revealed once I understand this? NOTE Consecutive Terms ...
I was looking up newer functions of JavaScript and found ECMAScript/ECMA 5. Because I had never heard of it I looked in to it more and found that it comes in the form of different names such as: JavaScript, JScript (Microsofts Variation), ECMAScript, ECMA 5, E4X (JavaScript for Xml)and many others From what I have read it seems that ...
I feel like my implementation is a bit naive. Take notice of the variables min in max which have a rather small precision of +/- 0.0001. If I raise the precision any further the code is just too slow. Algorithm Code private IDynamic ToExponential(Engine engine, Args args) { var x = engine.Context.ThisBinding.ToNumberPrimitive()...
I'll be the first to admit that my overall knowledge of low level programming is a bit sparse. I understand many of the core concepts but I do not use them on a regular basis. That being said I was absolutely astounded at how much code was needed for dtoa.c. For the past couple months I have been working on an ECMAScript implementation...
According to the ECMAScript specification in section 7.8.1 a NullLiteral is defined as follows: NullLiteral :: null What I am trying to understand is how this is represented in tree form when a NullLiteral is included in the following productions found in sections 7.6.1 and 7.8. ReservedWord :: Keyword FutureReserved...
I currently use Eclipse as my IDE for other languages and I'm rather used to not having to leave the IDE for anything - however I'm really struggling to find the same or a similar setup for pure ECMAScript-262. To clarify, I am not looking for DOM support, jquery, HTML or anything like that, preferably just an IDE with ECMAScript-262 su...