用js替换除数字与逗号以外的所有字符的代码_javascript技巧

function dostr(str){
str=trim(str);
var strarry=unique(str.split(","));
str=strarry.join(",");
str=str.replace(/，/ig,",");
str=str.replace(/[^0-9,]*/ig,"");
str=str.replace(new RegExp(',+',"gm"),',');
if (str.substr(0,1)==',') str=str.substr(1);
var reg=/,$/gi;
str=str.replace(reg,"");
return str;
}

//去重复数组
function unique(data){
data = data || [];
var a = {};
len = data.length;
for (var i=0; i
var v = data[i];

if (typeof(a[v]) == 'undefined'){

a[v] = 1;

}

};

data.length=0;

for (var i in a){

data[data.length] = i;

}

return data;

}

//供使用者调用

function trim(s){

return trimRight(trimLeft(s));

}

//去掉左边的空白

function trimLeft(s){

if(s == null) {

return "";

}

var whitespace = new String(" \t\n\r");

var str = new String(s);

if (whitespace.indexOf(str.charAt(0)) != -1) {

var j=0, i = str.length;

while (j < i && whitespace.indexOf(str.charAt(j)) != -1){

j++;

}

str = str.substring(j, i);

}

return str;

}

//去掉右边的空白

function trimRight(s){

if(s == null) return "";

var whitespace = new String(" \t\n\r");

var str = new String(s);

if (whitespace.indexOf(str.charAt(str.length-1)) != -1){

var i = str.length - 1;

while (i >= 0 && whitespace.indexOf(str.charAt(i)) != -1){

i--;

}

str = str.substring(0, i+1);

}

return str;

}