javascript中的咖喱

Posted 2021-02-25

each in Array,It can operate each element in Array.
e.g.
var result = [1,2,3,4].each(function(x){return Math.sqrt(x);});
//it return sqrt in [1,2,3,4]'s each item

Array.prototype.each = function(fn){
	return this.length? [fn(this[0])].concat(this.slice(1).each(fn)): [];
};
//e.g.
var arr = [1,2,3,4].each(function(x){return x*2;});
//alert(arr);//[2,3,6,8]