Learning is bateru » Javascript

Code of the Day: Sentence Scrambler

Larry — Wed, 04 Jan 2012 06:59:30 +0000

Task: There was a study going out a few years ago that said people can read words that are scrambled if the first and last character are left in place. So to help me practice Test Driven Development, I decided …

Improved Code for Javascript Decimal to Fraction

Larry — Sun, 27 Nov 2011 03:53:23 +0000

This post improves the code at “Code of the Day Javascript Decimal to fraction” by using Euclid’s Algorithm to find the Great Common Factor or GCF, aka GCD. This method provides a speed up of 10x when compared to the …

Code of the Day: Javascript Decimal To Fraction

Larry — Sun, 27 Nov 2011 00:40:34 +0000

Source: mivk from StackOverflow.com Code /** @function dec2frac @returns string @purpose Convert a decimal to a fraction */ function dec2frac(d) { var df = 1, top = 1, bot = 1; var limit = 1e5; //Increase the limit to get …

Code of the day: Javascript convert bytes to KB, MB, GB, etc

Larry — Wed, 24 Aug 2011 22:58:46 +0000

/** * @function: getBytesWithUnit() * @purpose: Converts bytes to the most simplified unit. * @param: (number) bytes, the amount of bytes * @returns: (string) */ var getBytesWithUnit = function( bytes ){ if( isNaN( bytes ) ){ return; } var units …

Code of the day: Check to see if a element has a event.

Larry — Fri, 19 Aug 2011 05:31:26 +0000

// hasEvent checks to see if a element contains a event. // @requires jQuery 1.3.2+ // @params el: string, jQuery object, node element. // @params eventName: string, name of the event. // @returns boolean var hasEvent = function( el, eventName …

jQuizMe Example: Simple Math Quiz

Larry — Wed, 04 May 2011 04:28:10 +0000

Here’s an example of jQuizMe. Goal: Make a quiz for Addition, Subtraction and Multiplication for two digit numbers. Steps: Make a random number generator. Make a function to form a question and answers. Form the quiz. Call jQuizMe Step 1: …

Code of the Day: Javascript Fibonacci Numbers the fast way

Larry — Tue, 19 Apr 2011 04:51:07 +0000

1 2 3 4 5 6 7 8 //Programmer: Larry Battle //Date: April 18, 2011 //Purpose: Get Fibonacci numbers in O(1) time. var getFibonacciNum = function( n ){ var s5 = Math.sqrt(5); var phi1 = (1+s5)/2, phi2 = (1-s5)/2; return …

Code of the Day: Javascript Significant Figures

Larry — Fri, 08 Apr 2011 04:59:18 +0000

Did you know that JavaScript automatically trims off trailing zeros on numbers with decimals? Well now you do, and in order to save precision you must wrap the number inside a string. Example: 1 2 3 4 5 6 var …

Code of the Day: Javascript Detect Internet Explorer

Larry — Mon, 04 Apr 2011 08:14:50 +0000

How many hours have you spent wasted on getting your site to run or display properly on Internet Explorer? Do you want to cheat and use browser stiffing instead of feature detection? 1 2 // isIE is your key to …

Retrieve Facebook password using javascript buffer overload attack.

Larry — Fri, 01 Apr 2011 20:20:45 +0000

Hey Everyone, I found a problem with the way most browsers handle the document.cookie global variable. If too many invalid characters are created, then this causes a buffer overload and allows all tab index to manually placed. So if you …