'AngularJS' filtering feature

I am dealing with an array of objects and I need to extract a specific value when a key is passed in the 'filter' function. Despite my best efforts, the controller code snippet provided below returns an undefined response. Can someone please assist me in identifying where I may be making a mistake?

var states =  [{"HIMACHAL PRADESH":"HP"},{"JAMMU AND KASHMIR":"JK"},{"JHARKHAND":"JH"},{"KARNATAKA":"KA"},{"KERALA":"KL"},{"MADHYA PRADESH":"MP"},{"MAHARASHTRA":"MH"},{"ORISSA":"OR"}]
var str = "ORISSA";
var abbr = $filter('filter')(states, {key: str}, true).value;
console.log ("ABBR:"+abbr);

P.S. The $filter has been injected into the controller.

javascriptarraysangularjs

Answer №1

Utilize the functions Object.keys along with find

var matchedState = states.find( s => Object.keys(s)[0] == str );
var abbr = matchedState ? matchedState[str] : ""

Demonstration

var states = [{
  "HIMACHAL PRADESH": "HP"
}, {
  "JAMMU AND KASHMIR": "JK"
}, {
  "JHARKHAND": "JH"
}, {
  "KARNATAKA": "KA"
}, {
  "KERALA": "KL"
}, {
  "MADHYA PRADESH": "MP"
}, {
  "MAHARASHTRA": "MH"
}, {
  "ORISSA": "OR"
}]
var str = "ORISSA";
var matchedState = states.find(s => Object.keys(s)[0] == str);
var abbr = matchedState ? matchedState[str] : ""
console.log(abbr);

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