Maths Array Class

2. Obtain the Script

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Introduction

To be able to define mathArray objects to use in your Javascript calculations you need to copy the following script and attach it to the head section of your page.

// mathArray Class
// copyright Stephen Chapman, 13th April 2006
// you may copy this code but please keep the copyright notice as well
function mathArray(vals) {var temp = vals.split(',');var len = temp.length;this.value = [];for (var i = 0; i < len; i++) {if (Number(temp[i]) == temp[i]) this.value.push(Number(temp[i]));}}mathArray.prototype.add = function(mA) {var len = Math.min(this.value.length, mA.value.length);for (var i = 0; i < len; i++) {this.value[i] += mA.value[i];}};mathArray.prototype.subtract = function(mA) {var len = Math.min(this.value.length, mA.value.length);for (var i = 0; i < len; i++) {this.value[i] -= mA.value[i];}};mathArray.prototype.multiply = function(num) {for (var i = this.value.length-1; i >= 0; i--) {this.value[i] *= num;}};mathArray.prototype.replace = function(mA) {this.value = '';var len = mA.value.length;for (var i = 0; i < len; i++) {this.value[i] = mA.value[i];}};mathArray.prototype.equal = function(mA) {var len = mA.value.length;if (this.value.length != len) return false; for (var i = 0; i < len; i++) {if (this.value[i] != mA.value[i]) return false;}return true;};mathArray.prototype.max = function(num) {for (var i = this.value.length-1; i >= 0; i--) {if (this.value[i] > num) this.value[i] = num;}};mathArray.prototype.min = function(num) {for (var i = this.value.length-1; i >= 0; i--) {if (this.value[i] < num) this.value[i] = num;}};mathArray.prototype.intg = function() {for (var i = this.value.length-1; i >= 0; i--) {this.value[i] = Math.round(this.value[i]);}};

Once you have created your code you just save it to an external javascript file. I called mine matha.js. You then link it into the head of your page using the following code:

Once you have the script attached to your page you can then use it from your other Javascripts to create and manipulate numerical arrays as I described in the introduction.

Guide since 2004

Stephen Chapman
JavaScript Guide

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