Questions (Continued)

What's the best way to debug JSBin?

We can drop in log.

  function log (x) { console.log(x); return x; }

Then you can drop log in your compositions.

  _.compose(get('title'), log, _.head)(articles)

Now you can save this to a variable

  var firstTitle = _.compose(get('title'), log, _.head)

then do things like:

  _.compose(_.head, firstTitle)(articles) // returns E

So you're creating a vocabulary of actions and data that you can use to write your program. It's like programming with DSL without knowing it.

He mentions what they said at Pivotal Labs: test driven development amplifies the pain if you're software is not well designed.

TDD as software design technique

Abundancia