review: Array.sort - javascript
Example 1:
<html>
<body>
<script type="text/javascript">
Array.prototype.sort02=function(a,b){
return -1;
}
var arr = new Array(6)
arr[0] = {"A":0};
arr[1] = {"A":1};
arr[2] = {"A":2};
arr[3] = {"A":3};
arr[4] = {"A":4};
arr[5] = {"A":5};
arr.sort(function(a,b){
// document.write("a.A"+a.A+"--b.A" + b.A+"<br/>");
return 1;
});
document.write("Array.sort:----<br/>");
for (var i in arr){
if(typeof(arr[i])=="object")
document.write("arr["+i+"]:"+arr[i].A+"<br/>");
}
arr.sort02();
document.write("Array.sort02:----<br/>");
for (var i in arr){
if(typeof(arr[i])=="object")
document.write("arr["+i+"]:"+arr[i].A+"<br/>");
}
</script>
</body>
Result:--------------
Array.sort:----
arr[0]:5
arr[1]:4
arr[2]:3
arr[3]:2
arr[4]:1
arr[5]:0
Array.sort02:----
arr[0]:5
arr[1]:4
arr[2]:3
arr[3]:2
arr[4]:1
arr[5]:0
Example 2：
----------------------------------
ar a2=[10,2,4,1,7];
a2.sort(); //1 ,10, 2, 4, 7 default sort by character.
function compare(value1,value2){
if(value1<value2){return -1;}
else if(value1>value2){return 2;}
else {return 0;}
}
a2.sort(compare);//a2 : 1, 2, 4, 7, 10
<html>
<body>
<script type="text/javascript">
Array.prototype.sort02=function(a,b){
return -1;
}
var arr = new Array(6)
arr[0] = {"A":0};
arr[1] = {"A":1};
arr[2] = {"A":2};
arr[3] = {"A":3};
arr[4] = {"A":4};
arr[5] = {"A":5};
arr.sort(function(a,b){
// document.write("a.A"+a.A+"--b.A" + b.A+"<br/>");
return 1;
});
document.write("Array.sort:----<br/>");
for (var i in arr){
if(typeof(arr[i])=="object")
document.write("arr["+i+"]:"+arr[i].A+"<br/>");
}
arr.sort02();
document.write("Array.sort02:----<br/>");
for (var i in arr){
if(typeof(arr[i])=="object")
document.write("arr["+i+"]:"+arr[i].A+"<br/>");
}
</script>
</body>
Result:--------------
Array.sort:----
arr[0]:5
arr[1]:4
arr[2]:3
arr[3]:2
arr[4]:1
arr[5]:0
Array.sort02:----
arr[0]:5
arr[1]:4
arr[2]:3
arr[3]:2
arr[4]:1
arr[5]:0
Example 2：
----------------------------------
ar a2=[10,2,4,1,7];
a2.sort(); //1 ,10, 2, 4, 7 default sort by character.
function compare(value1,value2){
if(value1<value2){return -1;}
else if(value1>value2){return 2;}
else {return 0;}
}
a2.sort(compare);//a2 : 1, 2, 4, 7, 10
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