JS ArrayBuffer和String

http://blog.mn886.net/chenjianhua/show/6b02fa4173ed/index.html

ArrayBuffer和String 互相转换

 1 function str2ab(str){
 2     var buf = new ArrayBuffer(str.length*2);
 3     bufView = new Uint16Array(buf);
 4     for(var i=0; i<str.length; i++){
 5         bufView[i] = str.charCodeAt(i);
 6     }
 7     return buf;
 8 }
 9 function ab2str(buf){
10     return String.fromCharCode.apply(null, new Uint16Array(buf));
11 }