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# ecma-fixes.js

¶

This file adds in full array method support in browsers that don't support it see: http://stackoverflow.com/questions/2790001/fixing-javascript-array-functions-in-internet-explorer-indexof-foreach-etc

¶

Add ECMA262-5 Array methods if not supported natively

    if (!('indexOf' in Array.prototype)) {
        Array.prototype.indexOf= function(find, i /*opt*/) {
            if (i===undefined) i= 0;
            if (i<0) i+= this.length;
            if (i<0) i= 0;
            for (var n= this.length; i<n; i++)
                if (i in this && this[i]===find)
                    return i;
            return -1;
        };
    }
    if (!('lastIndexOf' in Array.prototype)) {
        Array.prototype.lastIndexOf= function(find, i /*opt*/) {
            if (i===undefined) i= this.length-1;
            if (i<0) i+= this.length;
            if (i>this.length-1) i= this.length-1;
            for (i++; i-->0;) /* i++ because from-argument is sadly inclusive */
                if (i in this && this[i]===find)
                    return i;
            return -1;
        };
    }
    if (!('forEach' in Array.prototype)) {
        Array.prototype.forEach= function(action, that /*opt*/) {
            for (var i= 0, n= this.length; i<n; i++)
                if (i in this)
                    action.call(that, this[i], i, this);
        };
    }
    if (!('map' in Array.prototype)) {
        Array.prototype.map= function(mapper, that /*opt*/) {
            var other= new Array(this.length);
            for (var i= 0, n= this.length; i<n; i++)
                if (i in this)
                    other[i]= mapper.call(that, this[i], i, this);
            return other;
        };
    }
    if (!('filter' in Array.prototype)) {
        Array.prototype.filter= function(filter, that /*opt*/) {
            var other= [], v;
            for (var i=0, n= this.length; i<n; i++)
                if (i in this && filter.call(that, v= this[i], i, this))
                    other.push(v);
            return other;
        };
    }
    if (!('every' in Array.prototype)) {
        Array.prototype.every= function(tester, that /*opt*/) {
            for (var i= 0, n= this.length; i<n; i++)
                if (i in this && !tester.call(that, this[i], i, this))
                    return false;
            return true;
        };
    }
    if (!('some' in Array.prototype)) {
        Array.prototype.some= function(tester, that /*opt*/) {
            for (var i= 0, n= this.length; i<n; i++)
                if (i in this && tester.call(that, this[i], i, this))
                    return true;
            return false;
        };
    }