A previous poster asked Function.bind vs Closure in Javascript : how to choose?  and received this answer in part, which seems to indicate bind should be faster than a closure:     Scope traversal means, when you are reaching to grab a value   (var...
I want to run a Javascript console on top of V8. How do I do this?...
I'm doing a project in Node.js using express. Here's my directory structure:  root |-start.js |-server.js |-lib/ |    api/ |        user_getDetails.js |        user_register.js   The lib/api/ directory has a number of JS files relating to the...
Regardless of functional differences, does using the new keywords 'let' and 'const' have any generalized or specific impact on performance relative to 'var'?  After running the program:  function timeit(f, N, S) {     var star...
If I remove one element from an array using splice() like so:  arr.splice(i, 1);   Will this be O(n) in the worst case because it shifts all the elements after i? Or is it constant time, with some linked list magic underneath?...
The difference between a javascript Array, and Object is not very big. In fact it seems Array mainly adds the length field, so you can use both Arrays and Objects as numeric arrays:  var ar = new Array(); ar[0] = "foo"; ar["bar"] = &#...
So I have this simple code:  function Run () {   var n = 2*1e7;   var inside = 0;   while (n--) {     if (Math.pow(Math.random(), 2) +         Math.pow(Math.random(), 2) < 1)       inside++;   }    return inside; }  var start = Date.now(); Run();...
In Bluebird's util.js file, it has the following function:  function toFastProperties(obj) {     /*jshint -W027*/     function f() {}     f.prototype = obj;     ASSERT("%HasFastProperties", true, obj);     return f;     eval(obj); }   For...
My aim is to develop a java script profiler for nodejs . The requirements are as under :   Should be able to fetch call stack . Get Time stamp information. Get number of iterations.    My chief concern is that i should not modify the source file ( .j...
Please take a look at the following JavaScript. I've taken stuff out of it, so you may focus on the essence of the problem.  You'll notice that I call the prepPath function twice in a row, passing in the exact same string. In firefox and IE8,...

Tags

Recent Questions

Top Questions

Home Tags Terms of Service Privacy Policy DMCA Contact Us

©2020 All rights reserved.