list-comprehension - 枚举并在Coffeescript中压缩？

Question

来自Python，我喜欢Coffeescript从Python和Perl借来的许多功能(范围/ slice ，理解，破坏性分配)。 Coffeescript中是否有任何语法糖可以模仿Python的enumerate或zip(itertools.izip)函数？

以下是我不太关心的模式:

# an enumerate call would be helpful here
i = 0
for x in arr
  ... use x and i ...
  i++

和

# a zip would be useful here
n = Math.min(arr1.length,arr2.length)
for i in 0...n
  x = arr1[i]; y = arr2[i]
  ... use x and y ...

Answer 1

forEach有效地内置于:

a = ['a','b','c']
for el,i in a
    alert "Element #{el} is at index #{i}"