/mb

Exception-free nested nullable attribute accessor

Primary LanguageJavaScriptThe UnlicenseUnlicense

mb

goat

Exception-free nested nullable attribute accessor. An alternative to facebookincubator/idx in 41 bytes.

Install

Just copy/paste this function into your project:

var mb = (...p) => o => p.map(c => (o ? (o = o[c]) : 0)) && o;

Alternatively, you can download mb.js.

Use

var getHello = mb("a", "b", 0, "hello");
var getHelloLength = mb("a", "b", 0, "hello", "length");

var obj1 = {
  a: {
    b: [{ hello: "world" }]
  }
};

var obj2 = {
  c: {
    d: "e"
  }
};

getHello(obj1); // world
getHelloLength(obj1); // 5

getHello(obj2); // undefined
getHelloLength(obj2); // undefined

Contribution and Code-Golfing

  1. Clone and shorten current code.
  2. Please open test.html in your browser and open console to see if all the tests pass.

Contributors