A detailed explanation of the array object extension and string object extension _javascript techniques in JS

Nonsense not to say more, directly to everyone on the array object extension code, the specific code as follows:

/** * Created by Laixiangran on 2016/01/07. * Array extension/function () {//traversal array if (typeof Array.prototype.forEach!= "function") {Array.prototype.forEach = function (FN, context) {for (var i = 0; i < this.length i++) {if typeof fn = = "function" && Object.prototype.hasOwnProperty.call (
This, i) {Fn.call (context, this[i], I, this);}
}; //Let each element in the array call the given function, and then place the resulting result in the new array to return if (typeof Array.prototype.map!= "function") {Array.prototype.map = function (fn , context) {var arr = []; if (typeof fn = = ' function ') {for (var k = 0, length = this.length; k < length; k++) {arr
. push (Fn.call, This[k], K, this);
} return arr;
};  ////(typeof Array.prototype.filter!= "function") {Array.prototype.filter = function (FN, context) by placing qualifying elements in a new array {var arr = []; if (typeof fn = = "function") {for (var k = 0, length = this.length; k < length; k++) {Fn.call (conte
XT, This[k], K, this) && Arr.push (This[k]);
} return arr;
}; //If each element in the array is able to pass the givenIs true, vice versa False if (typeof Array.prototype.every!= "function") {Array.prototype.every = function (FN, context) {
var passed = true; if (typeof fn = = "function") {for (var k = 0, length = this.length; k < length; k++) {if (passed = = false) break; p assed =!!
Fn.call (context, this[k], K, this);
} return passed;
}; //similar to the Every function, but returns True if (typeof Array.prototype.some!= "function") {Array.prototype.some = function as long as there is a test passed the given function (FN  , context) {var passed = false; if (typeof fn = = ' function ') {for (var k = 0, length = this.length; k < length; k++) {if (passed = = true) break; passed =!!
Fn.call (context, this[k], K, this);
} return passed;
};  }//Returns the index of the element in the array, does not return-1, left to right if (typeof Array.prototype.indexOf!= "function") {Array.prototype.indexOf = function (item, Index) {var n = this.length, i = index = = NULL 0:index < 0?
Math.max (0, n + index): index;
for (; i < n; i++) {if (i) && this[i] = = Item {return i}} return-1}; }//ReturnReturns the element to the index of the array, does not return-1, from right to left if (typeof Array.prototype.lastIndexOf!= "function") {Array.prototype.lastIndexOf = function ( Item, index) {var n = this.length, i = index = = null? n-1: Index < 0?
Math.max (0, n + index): index;
for (; I >= 0; i--) {if (I in this && this[i] = = Item) {return i;}} return-1;
}; //Let the array element call the given function sequentially, and finally return a value (Left-to-right) if (typeof Array.prototype.reduce!= "function") {Array.prototype.reduce = function (cal Lback, InitialValue) {var previous = InitialValue, k = 0, length = this.length; if (typeof initialvalue = = "undefined")
{previous = This[0]; k = 1;} if (typeof callback = = "function") {for (k; k < length; k++) {this.hasownproperty (k) && (previous = callback
(Previous, This[k], K, this));
} return previous;
}; //Let the array elements call the given function sequentially, and finally return a value (Right-to-left) if (typeof Array.prototype.reduceRight!= "function") {Array.prototype.reduceRight = Fu
Nction (callback, InitialValue) {var length = this.length, k = length-1, previous = InitialValue;if (typeof InitialValue = = "undefined") {previous = this[length-1]; k--} if (typeof callback = = "function") {for ( K K >-1;
K-=1) {This.hasownproperty (k) && (previous = callback (previous, This[k), K, this);}
return previous;
}; ///Remove duplicates (uniqueness), return the new array if (typeof Array.prototype.uniq!= "function") {Array.prototype.uniq = function () {var arr = []; a
Rr[0] = this[0];
for (var i = 1; i < this.length i++) {if (Arr.indexof (this[i) = = 1) {Arr.push (this[i));} return arr;
}; }//Specifies to delete a value in the array if (typeof Array.prototype.remove!= "function") {Array.prototype.remove = function (item) {for (var i = t His.length; I >= 0;
i--) {if (item = = This[i]) {This.splice (I, 1);}} return this;
}; //Shuffle array order if (typeof Array.prototype.shuffle!= "function") {Array.prototype.shuffle = function () {var i = This.length
;
while (i) {var j = Math.floor (Math.random () *i), var t = this[--i]; This[i] = This[j]; this[j] = t;
}; }//To find the maximum value of an array if (typeof Array.prototYpe.max!= "function") {Array.prototype.max = function () {return Math.max.apply ({}, this)};//Find the minimum value of an array if (typeof Arr 

Ay.prototype.max!= "function") {Array.prototype.min = function () {return Math.min.apply ({}, this)};} Determines whether the array if (typeof Array.prototype.isArray!= "function") {Array.prototype.isArray = function () {return Object.protot
Ype.toString.apply (This) = = "[Object Array]";
}; } 
}());

The following

is the string object extension code as follows:

/** * Created by Laixiangran on 2015/12/12. * String extension/(function () {//16 in the regular expression of the color value var reg =/^# ([0-9a-fa-f]{3}|[
0-9A-FA-F]{6}) $/; RGB color Conversion to 16 if (typeof String.prototype.rgbToHex!= "function") {String.prototype.rgbToHex = function () {var that =
This if (/^ (rgb| RGB)/.test {var acolor = That.replace (/?: \ (|\) |rgb|
RGB) */g, ""). Split (",");
var strhex = "#";  for (var i=0 i<acolor.length; i++) {var hex = number (Acolor[i]). toString (); if (hex = = "0") {hex = hex;} strhex
+ + hex;
} if (Strhex.length!== 7) {strhex = that;} return strhex;
}else if (reg.test (that)) {var anum = That.replace (/#/, ""). Split (""); if (anum.length = = 6) {return that;} else if (anum.length = = 3) {var numhex = "#"; for (var j=0 j<anum.length; J + +) {Numhex = (anum[j]+anum[j));} Retu
RN Numhex;
}else{return to that;}; }//16 convert color to RGB format if (typeof String.prototype.hexToRgb!= "function") {STRING.PROTOTYPE.HEXTORGB = function () {var scol
or = This.tolowercase (); if (Scolor &Amp;& reg.test (Scolor)) {if (scolor.length = = 4) {var scolornew = "#"; for (var i = 1; i < 4; i++) {scolornew =
Scolor.slice (i,i+1). Concat (Scolor.slice (i,i+1));
} Scolor = Scolornew;
//Handle six-bit color value var scolorchange = []; for (var j=1 j<7; j+=2) {Scolorchange.push (parseint ("0x" +scolor.slice (j,j+2))), return "RGB (" + Scolorchange.join (
",") + ")";
}else{return scolor;}; ///Remove the string from end to End if (typeof String.prototype.trim!= "function") {String.prototype.trim = function () {return This.replace ( /^\s+|\s+$/g, "");};} ());