Chaining using underscore

chain.js

_({first: 1, second: 2, text: 'string here' }) // put object to wrapper
  .chain() // chaining enabled
  .compact() //  now work with: [1,2, 'string here']
  .size() // now: 3
  .value() // return result

explanation.md

Using underscore.js "wrapper"

Calling underscore as a function will return a wrapped object. Calling chain() on the object allows you to chain subsequent functions.