Deriving a new Array from an existing Array:
['■','●','▲'].slice(1, 3) ⟼ ['●','▲']
['■','●','■'].filter(x => x==='■') ⟼ ['■','■']
['▲','●'].map(x => x+x) ⟼ ['▲▲','●●']
['▲','●'].flatMap(x => [x,x]) ⟼ ['▲','▲','●','●']
Eric Steven Raymond, Thyrsus Enterprises, < esr@thyrsus.com >
Rick Moen, < respond-auto@linuxmafia.com >
翻译:柯非, < zer4tul@gmail.com >
这篇译文基于2014.05.21更新的原文修订版3.10。
特别感谢王刚,此前本文的翻译是由他进行的。