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Implementation Code for repeated entries in javascript numeric Array

Source: Internet
Author: User
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Test.htm
 Copy codeThe Code is as follows: <! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<Html xmlns = "http://www.w3.org/1999/xhtml">
<Head>
<Meta http-equiv = "Content-Type" content = "text/html; charset = gb2312"/>
<Title> array-remove-repeate </title>
<Style>
. Tt {background-color: #006699; height: 3px; overflow: hidden ;}
</Style>

</Head>

<Body>
<Div class = "tt"> </div>
<Div class = "result" id = "result"> </div>
<Script>

If (! Console)
{
Var console = {};
Console. log = function (str) {alert (str );}
}

Array. prototype. unique1 = function (){
Var r = new Array ();
Label: for (var I = 0, n = this. length; I <n; I ++ ){
For (var x = 0, y = r. length; x <y; x ++ ){
If (r [x] = this [I]) {
Continue label;
}
}
R [r. length] = this [I];
}
Return r;
}

Array. prototype. unique2 = function (){
Return this. sort (). join (",,"). replace (/(, | ^) ([^,] +) (, \ 2) + (, | $)/g, "$1 $2 $4 "). replace (/, +/g ,","). replace (/, $ /,""). split (",");
}

Array. prototype. unique3 = function (){
Var temp = {}, len = this. length;
For (var I = 0; I <len; I ++ ){
Var tmp = this [I];
If (! Temp. hasOwnProperty (tmp )){
Temp [this [I] = "my god ";
}
}

Len = 0;
Var tempArr = [];
For (var I in temp ){
TempArr [len ++] = I;
}
Return tempArr;
}
Array. prototype. unique4 = function (){
Var temp = new Array ();
This. sort ();
For (I = 0; I <this. length; I ++ ){
If (this [I] = this [I + 1]) {
Continue;
}
Temp [temp. length] = this [I];
}
Return temp;

}

Var test = (function ()
{
Var arr2 = [];
For (var I = 0; I <2000; I ++)
{
Var t = I;
T = parseInt (Math. random () * 2000) + 1;
Arr2 [I] = (t. toString ());

}
// Arr2 = ["zhoujian", "zhou", "zhou"];
Return function (){
Return arr2;
// Return [1, 2, 3];
};

})();
Window. onload = function (){

//
Watch. start ("Cost times1 :");
Var arr = test ();
Console. log (arr. length );

Arr = arr. unique1 ();
Console. log (arr. length );

Watch. stop ();
//
Watch. start ("Cost times2 :");
Arr = test ();
Console. log (arr. length );

Arr = arr. unique2 ();

Console. log (arr. length );

Watch. stop ();
//
Watch. start ("Cost times3 :");
Arr = test ();
Console. log (arr. length );

Arr = arr. unique3 (); // the fastest speed when the array is large

Console. log (arr. length );

Watch. stop ();

//

Watch. start ("Cost times4 :");
Arr = test ();
Console. log (arr. length );
Arr = arr. unique4 ();
Console. log (arr. length );
Watch. stop ();
Watch. report ();

}
</Script>
</Body>
</Html>

Watch. js
Copy codeCode: var Watch = {
Result: [],
Guid:-1,
TotalTime: 0,
Start: function (title ){
This. result [++ this. guid] = [title | this. guid, new Date (). getTime ()];
},
Stop: function (){
Var r = this. result [this. guid];
Var t = new Date (). getTime ()-r [1];
This. totalTime + = t;
R [1] = t;
If (t & gt; = 10000 ){
Alert ("This code takes too long to run, you shoshould optimizate them .");
}
},
Report: function (parent ){
Var div = document. createElement ("div ");
Div. style. fontSize = "12px ";
Var str = [];
Str. push ("<p> <B> The total times: </B> <span style = 'color: # f00'>" + this. totalTime + "</span> ms. </p> ");
For (var I = 0, l = this. result. length; I <l; I ++ ){
If (this. result [I]. length> 1 ){
Str. push ("<p>" + "<span style = 'width: 200px; display: inline-block; background-color: # f7f7f7;-moz-border-radius: 3px; -webkit-border-radius: 3px; border-radius: 3px; '> "+" <span style = 'background-color: #0c0;-moz-border-radius: 3px;-webkit-border-radius: 3px; border-radius: 3px; width = "+ (this. totalTime = 0? This. totalTime: parseInt (200 * this. result [I] [1]/this. totalTime) + "px; display: inline-block; '>" + this. result [I] [1] + "</span>" + "</span> <span style = 'width: 150px; display: inline-block; '> "+ this. result [I] [0] + "</span>" + "</p> ");
} Else {
Str. push (this. result [I] [0]);
}
}
Div. innerHTML = str. join ("");
Parent = parent | document. body;
Parent. appendChild (div );
Div = null;

This. totalTime = 0;
This. guid =-1;
This. result = [];
},
Fns: function (){
Var a = arguments;
For (var I = 0, l = a. length; I <l; I ++ ){
This. start (a [I] [0]);
A [I] [1] ();
This. stop ();
}
},
ExecByTimes: function (fn, times, title ){
This. start (title );
While (times --){
Fn ();
}
This. stop ();
},
Print: function (str ){
This. result [++ this. guid] = [str];
}
}

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Keywords:
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