ExtendingTheJavaScriptArray

example1.js

var domainNameParts = “www.keithbloom.co.uk”.split(‘.’); // returns [‘www’,’keithbloom’,’co’,’uk’]
var subDomains = [‘www’,’landingpages’,’uk’];

example2.js

var subtract = function(input, mask) {
    for (i = 0; i < input.length - 1; i++) {
        for(j = 0; j <= mask.length; j++)  {
            if(input[i] == mask[j])
                input.splice(i,1);
            }
        }
    return input;
};

var result = subtract(domainNameParts, subDomains);

example3.js

var cookieDomain = '.' + subtract(domainNameParts, subDomains).join('.');

example4.js

Array.prototype.subtract = function(mask) {
    for (i = 0; i < this.length - 1; i++) {
        for (j = 0; j <= mask.length; j++) {
            if (this[i] === mask[j]) {
                this.splice(i, 1);
            }
        }
    }
    return this;
};

example5.js

var cookieDomain = '.' + 'www.keithbloom.co.uk'.split('.').subtract(subDomains).join('.');

example6.js

Array.porototype.a_namespace_subtract = function() …