javascript - AngularJS: HTML select to use values from map with ascending order on key -

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i have map(bidirectional) of states. composed of statename , statecode. populated following html code cannot filter statecode or statename in ascending order.

<div class="col-sm-2">               <select ng-model="location.statecode"  ng-change="loaddistricts();" ng-options="statename (statecode, statename) in stateoptions | orderby:'statecode'" class="form-control" id="state"></select> </div>  //json object     stateoptions = {'mh':'maharashtra','gj':'gujarat','mp':'madhya pradesh'};

you inverted statecode , statename:

ng-options="statename (statecode, statename) in stateoptions"

also, stateoptions object, keys probably inserted alphabetically, depending on js virtual machine. orderby filter here pointless, because (from documentation):

orders specified array expression predicate. ordered alphabetically strings , numerically numbers

see fiddle

edit: if want surely control order, rework structure array:

$scope.stateoptions = [{     statecode: 'mh',     statename:'maharashtra' },{     statecode: 'gj',     statename:'gujarat' },{     statecode: 'mp',     statename:'madhya pradesh' }];  ng-options="state.statename state in stateoptions | orderby: 'statecode'"

see updated fiddle


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