clean json (remove undefined nodes)

json-cleaner.js

var jsonDummy = {
  key: 'val',
  underobj: {
    ewssswww: undefined,
    asdas: 45105,
    ssswww: undefined,
    errwew: undefined,
    ssswww: 0,
    sdfsd: 'dfsdf',
    uuunt: {
      a: "aaa",
      b: [055, 4540, undefined, undefined, undefined, 10510, 4747]
    },
    dfff: [
      5404,
      undefined,
      undefined,
      444777
    ]
  }
}

// before cleaning json
console.info(JSON.stringify(jsonDummy));

function recursiveJsonCleaner(key, value) {
  $.each(value, function (i, val) {
    if (typeof val === 'object') {
      recursiveJsonCleaner(i, val);
    } else {
      if (typeof val === "undefined") {
        if (Array.isArray(value)) {
          value.splice(i, 1);
          recursiveJsonCleaner(key, value);
        }
      }
    }
  });
}

recursiveJsonCleaner('', jsonDummy);

// after cleaning json
console.info(JSON.stringify(jsonDummy));