javascript 함수 원형

//  
String.prototype.trim = function() {
    var re = /(^\s*)|(\s*)$/g;
    return this.replace(re, "");
}


//  
Array.prototype.remove = function(i) {
    var o = this[i];
    for (var j = i; j < this.length - 1; j ++) {
        this[j] = this[j + 1]; // i ， ， 
    }
    -- this.length; 
    return o;
}


//  
Array.prototype.search = function(o) {
    for (var i = 0; i < this.length; i ++) {
        if (this[i] == o) {
            return i;
        }
    }


    return -1;
}


// 
var str = " This is test string   ";
console.log(str);
console.log(str.trim());
console.log(str);




var arr = [1, 2, 3, 4];
console.log(arr.length);
console.log(arr.remove(2));
console.log(arr);


var arr = [1, 2, 3, 4];
console.log(arr.search(5));
console.log(arr.search(3));

참조:http://security.ctocio.com.cn/tips/337/7716837_3.shtml