jquery - Remove certain elements from map in Javascript -

how can remove key/value pairs following map, key starts x.

var map = new object();  map[xkey1] = "value1"; map[xkey2] = "value2"; map[ykey3] = "value3"; map[ykey4] = "value4"; 

edit

is there way through regular expression, using ^ . map[^xke], key starts 'xke' instead of 'x'

you can iterate on map keys using object.key.

the simple solution :

demo here

object.keys(map).foreach(function (key) {  if(key.match('^'+letter)) delete obj[key]; }); 

so here other version of removekeystartswith regular expression said:

function removekeystartswith(obj, letter) {   object.keys(obj).foreach(function (key) {      //if(key[0]==letter) delete obj[key];////without regex            if(key.match('^'+letter)) delete obj[key];//with regex    }); }  var map = new object();  map['xkey1'] = "value1"; map['xkey2'] = "value2"; map['ykey3'] = "value3"; map['ykey4'] = "value4";  console.log(map); removekeystartswith(map, 'x'); console.log(map); 

solution regex cover need if use letter=xke said other solution without regex , need replace :

key[0]==letter key.substr(0,3)==letter