Collection of extended implementation codes for some Array and String prototype objects_javascript skills

Some of the ones collected from Wuyou Script are really good and practical and worth collecting.
Methods to extend the prototype object of Array

Copy code The code is as follows:

//Delete data in the array
Array.prototype.del = function(n)
{
if (n<0) return this;
return this.slice(0,n ).concat(this.slice(n 1,this.length));
}
// Array shuffling
Array.prototype.random = function()
{
var nr =[], me=this, t;
while(me.length>0)
{
nr[nr.length] = me[t = Math.floor(Math.random() * me .length)];
me = me.del(t);
}
return nr;
}
//Number array sorting
Array.prototype.sortNum = function( f)
{
if (!f) f=0;
if (f==1) return this.sort(function(a,b){return b-a;});
return this.sort(function(a,b){return a-b;});
}
// Get the maximum item of the numeric array
Array.prototype.getMax = function()
{
return this.sortNum(1)[0];
}
// Get the minimum item of the numeric array
Array.prototype.getMin = function()
{
return this.sortNum (0)[0];
}
// The position where the specified element value first appears in the array
Array.prototype.indexOf = function(o)
{
for (var i =0; ireturn -1;
}
// Remove duplicate items in the array
Array.prototype.removeRepeat=function()
{
this.sort();
var rs = [];
var cr = false;
for (var i=0; i< ;this.length; i )
{
if (!cr) cr = this[i];
else if (cr==this[i]) rs[rs.length] = i;
else cr = this[i];
}
var re = this;
for (var i=rs.length-1; i>=0; i--) re = re.del (rs[i]);
return re;
}

Example:
var arr=["ni","wo","ta"];
Delete "wo" in the array
var newArr=arr.del(1);
Return the position where "me" first appears in the array, if not, return -1
var strPos=arr .indexOf("me");

Methods that extend the prototype object of String

Copy code The code is as follows:

//Get the character array
String.prototype.ToCharArray=function()
{
return this.split("");
}
//Get N identical strings
String.prototype.Repeat=function(num)
{
var tmpArr=[];
for(var i=0; ireturn tmpArr.join("");
}
//Reverse order
String.prototype.Reverse=function()
{
return this.split("").reverse().join("");
}
//Test whether it is a number
String.prototype.IsNumeric=function()
{
var tmpFloat=parseFloat(this);
if(isNaN(tmpFloat)) return false;
var tmpLen=this.length-tmpFloat.toString().length;
return tmpFloat " 0".Repeat(tmpLen)==this;
}
//Test whether it is an integer
String.prototype.IsInt=function()
{
if(this=="NaN ") return false;
return this==parseInt(this).toString();
}
// Combine multiple blanks into one blank
String.prototype.resetBlank = function()
{
return this.replace(/s /g," ");
}
// Remove left blank
String.prototype.LTrim = function()
{
return this.replace(/^s /g,"");
}
// Remove the right blank
String.prototype.RTrim = function()
{
return this. replace(/s $/g,"");
}
// Remove whitespace on both sides
String.prototype.trim = function()
{
return this.replace(/( ^s )|(s $)/g,"");
}
// Reserved numbers
String.prototype.getNum = function()
{
return this.replace( /[^d]/g,"");
}
// Reserved letters
String.prototype.getEn = function()
{
return this.replace(/[^ A-Za-z]/g,"");
}
// Keep Chinese
String.prototype.getCn = function()
{
return this.replace(/[ ^u4e00-u9fa5uf900-ufa2d]/g,"");
}
// Get the byte length
String.prototype.getRealLength = function()
{
return this.replace (/[^x00-xff]/g,"--").length;
}
//Truncate a string of specified length from the left
String.prototype.left = function(n)
{
return this.slice(0,n);
}
//Truncate a string of specified length from the right
String.prototype.right = function(n)
{
return this.slice(this.length-n);
}
// HTML encoding
String.prototype.HTMLEncode = function()
{
var re = this;
var q1 = [/x26/g,/x3C/g,/x3E/g,/x20/g];
var q2 = ["&","<",">"," "];
for(var i=0;ire = re.replace(q1[i],q2[i]);
return re;
}
//Unicode conversion
String.prototype.ascW = function()
{
var strText = "";
for (var i=0; ireturn strText;
}