复制代码 代码如下:
Array.prototype.each = function(fn){
fn = fn || Function.K;
var a = [];
var args = Array.prototype.slice.call(arguments, 1);
for(var i = 0; i < this.length; i++){
var res = fn.apply(this,[this[i],i].concat(args));
if(res != null) a.push(res);
}
return a;
};
Array.prototype.uniquelize = function(){
var ra = new Array();
for(var i = 0; i < this.length; i ++){
if(!ra.contains(this[i])){
ra.push(this[i]);
}
}
return ra;
};
Array.complement = function(a, b){
return Array.minus(Array.union(a, b),Array.intersect(a, b));
};
Array.intersect = function(a, b){
return a.uniquelize().each(function(o){return b.contains(o) ? o : null});
};
Array.minus = function(a, b){
return a.uniquelize().each(function(o){return b.contains(o) ? null : o});
};
Array.union = function(a, b){
return a.concat(b).uniquelize();
};
