写一个方法去掉一个数组的重复元素！谢谢。
Array.prototype.unique = function() {
var ret = [], done = {},o = this;
for ( var i=0,length=o.length; i <length; i++) {
if (!done[o[i]]){
done[o[i]] = true;
ret.push( o[i] );
}
}
return ret;
}
[MyArray].unique
JScript code:
function unique(arr) {
var o = {}, re = [];
for(var i = 0, len = arr.length; i < len; i++) {
if(o[arr[i]] === undefined) o[arr[i]] = arr[i];
}
for(var p in o) re[re.length] = p;
return re;
}
alert(unique([1,2,3,1,3,3,2]))
JScript code:
function unique(arr) {
var str = arr.join(','), re = [];
str.replace(/([^,]*)/g, function($0, $1, i) {
if(str.indexOf($1) == i) re[re.length] = $1;
});
return re;
}
alert(unique([1,2,3,1,3,3,2,4,4]))
JScript code:
function unique(arr) {
var str = arr.join(','), re = [];
str.replace(/([^,]+)/g, function($0, $1, i) {
if(str
三个数x,y,z 比大小..
var x,y,z,t;
if (x>y)
{t=x;x=y;y=t;} //交换x,y的值
if(x>z)
{t=z;z=x;x=t;}//交换x,z的值
if(y>z)
{t=y;y=z;z=t;}//交换z,y的值
这是 ......
