Find path of a value in an object

findPath.coffee

findPath = (obj, query) ->
  for k, v of obj
    if typeof v is "object"
      path = findPath v, query
      return "#{k}.#{path}" if path
    else if v is query
      return k

findPath.js

var findPath;

findPath = function(obj, query) {
  var k, path, v;
  for (k in obj) {
    v = obj[k];
    if (typeof v === "object") {
      path = findPath(v, query);
      if (path) {
        return k + "." + path;
      }
    } else if (v === query) {
      return k;
    }
  }
};

findPath.md

Click here for JSBin demo

This question was originally asked here

var obj = {
  bat: "bee", 
  bird: "plane", 
  bee : { 
    foo : "bar", 
    test : { 
      text: "needle" 
    }
  }
};
var path = findPath (obj, ‘needle’);

would yield

path = “bee.test.text”