azu/promises-book — pull request #50 by azu (2014-05-24 10:16:02+00:00)
Title: [WIP] Promise#catchについて

https://github.com/azu/promises-book/issues/10

- [ ] Promise#catchはthenのエイリアス
- [ ] thenとcatchの使い分け
- [ ] IE9未満の`catch`の問題