Getting JSON Key from Value or Inverting JSON Data

Question

Getting single key from Value

I would like to do a backwards selection from the following JSON. I\'d like to extract the abbreviation for a particular state. In thi

Answer 1

The only other logical solution would be to have the long name be the key and the abbreviation be the value. Selection is usually made on keys since they are unique, as they should.

You could save yourself from iterating every time you want to get the value, by doing the key - value switch the first time.

function switcharoo(o) {
    var t = {};
    for (var i in o) {
        if(o.hasOwnProperty(i)){
            t[o[i]] = i ;
        }
    }
    return t;
}

console.log(switcharoo({AZ: "Arizona"}));