Learning is bateru » Javascript

Code of the Day: Javascript Decimal Expansion a.k.a Division

Larry — Wed, 16 May 2012 22:54:05 +0000

Today’s Code of the Day is about decimal expansion, which is just division. So you might be asking yourself, “if decimal expansion is divsion. Then why not use a/b?”. Well the problem is that Javascript has a ton of problems …

Code of the Day: Javascript, Fix for isNaN

Larry — Mon, 14 May 2012 22:25:45 +0000

Javascript is a dynamically typed langauges. This feature causes for Arrays, Booleans, and other types to be converted to a numeric values depending on usage. However this feature can cause headarches when trying to detect numbers. For example, isNaN() detects …

Code of the Day: Javascript, Prime Factors of a Number

Larry — Fri, 11 May 2012 23:05:30 +0000

Javascript: Prime Factorization Today’s code is a enhancement of Code Renaissance‘s version of “Finding Prime Numbers in Javascript”. Main difference are the following. Faster performance by eliminating recursion and caching Math.sqrt. Whole numbers bigger than 1 return an empty array, …

Code of the Day: Javascript, Convert decimal to a simplified fraction

Larry — Wed, 09 May 2012 00:09:37 +0000

Inspired from a stackoverflow.com question. Convert decimal amount to text string fraction in Javascript? Code /** * @author Larry Battle <http://bateru.com/news/contact-me> * @license MIT * @version 1.0 * @date May 08, 2012 * @purpose To provide a function that converts …

Code of the day: Get unique objects from an array of json objects.

Larry — Sun, 01 Apr 2012 02:42:07 +0000

Inspired from Removing duplicate objects with Underscore for Javascript Source: /** @function _.uniqObjects @require Underscore.js and json.stringify @purpose return an array of objects without duplicated objects. */ _.uniqObjects = function( arr ){ return _.uniq( _.collect( arr, function( x ){ return …

Reimplementation of Number.prototype.toFixed

Larry — Sun, 01 Apr 2012 01:53:33 +0000

Number.prototype.toFixed was giving me too many problems, so I just rewrote it. There’s the source. /** @author Larry Battle <a alt="contact me" href="bateru.com/news/contact">Contact Me</a> @date Mar 30, 2012 @purpose Provide the fix for Number.prototype.toFixed() function. @info source at http://bateru.com/news/2012/03/reimplementation-of-number-prototype-tofixed */ …

Code of the day: Fix for Number.prototype.toFixed

Larry — Thu, 29 Mar 2012 08:47:23 +0000

In javascript, Number.prototype.toFixed has problems rounding. Here’s the fix and some test cases. Number.prototype.toFixed = (function () { var oldToFixed = Number.prototype.toFixed; return function (precision) { var value = this.toString(), power = Math.pow(10, precision || 0); return oldToFixed.call((Math.round(value * power) …

Javascript Error: ParseInt fails when supplied with large numbers

Larry — Wed, 28 Mar 2012 02:24:33 +0000

ParseInt returns 1 for when passed any number greater or equal to 1e+21. var x = 1.0e+2; console.log( x == 1e+2 ); console.log( parseInt( x, 10 ) == 100 ); console.log( parseFloat( x ) == 100 ); var x …

js2coffee.org helps your learn coffeescript faster

Larry — Sun, 18 Mar 2012 21:41:18 +0000

coffeescript icon Coffee-script is a smoking hot simple language that converts 100% into Javascript code. Coffee-script allows you to spend more time focusing on the algorithm rather than the syntax. js2coffee.org is an awesome website that converts your Coffee-script to …

Siebel eScript headaches.

Larry — Sun, 18 Mar 2012 21:11:06 +0000

Here are a few problems that I’ve encountered while spending a week programming in Siebel eScript 7.8. Siebel eScript is ECMAScript compliant. ECMAScript is the standard implementation of JavaScript as defined by the ECMA-262 standard. Beginning with Siebel Business Applications …