javascript - Swapping Array elements with Keys -

im trying swap 2 array elements in array looks this

[18785:object, 22260:object, 22261:object, 22262:object, 22263:object] 

i used following code:

    that.movemediumdown = function(mediumid){          var arrkeys = new array();          (key in that.data.medium) {             arrkeys.push(parseint(key));         }          (var = 0; < arrkeys.length; i++){             if (arrkeys[i] === parseint(mediumid)) {                  //swap medium                 var tmpmedium = that.data.medium[arrkeys[i]];                 that.data.medium[arrkeys[i]] = that.data.medium[arrkeys[i + 1]];                 that.data.medium[arrkeys[i + 1]] = tmpmedium;                  break;             }         }          //build new array correct ids          var tmpmediumarray = new array();          (var j = 0; j < arrkeys.length; j++){             tmpmediumarray[arrkeys[j]] = that.data.medium[arrkeys[j]];         }     } 

the problem when swap content of 2 array elements, key stays same. need swap key.

so tried build new array correct keys array 22263 elements. of them undefined , 5 correct.

is there method without getting such big array?

thanks in advance help.

checkout array_flip function.

it allows swap keys elements:

array_flip( {a: 1, b: 1, c: 2} );

becomes

{1: 'b', 2: 'c'}