var Dict = []
var addpair = function (mykey , myvalue) [
  Dict.push({
    key:   mykey,
    value: myvalue
  });
}

var givevalue = function (my_key) {
  return Dict["'" +my_key +"'"]         // not working
  return Dict["'" +my_key +"'"].value // not working
}

var dict = {};
var addPair = function (myKey, myValue) {
    dict[myKey] = myValue;
};
var giveValue = function (myKey) {
    return dict[myKey];
};