ruby的array[n..m]在JavaScript中是否有一个类似功能？
例如:
>> a = ['a','b','c','d','e','f','g']
>> a[0..2]
=> ['a','b','c']
ruby的array[n..m]在JavaScript中是否有一个类似功能？
例如:
>> a = ['a','b','c','d','e','f','g']
>> a[0..2]
=> ['a','b','c']
使用array.slice(begin [, end])功能.
var a = ['a','b','c','d','e','f','g'];
var sliced = a.slice(0, 3); //will contain ['a', 'b', 'c']
The last index is non-inclusive;为了模仿ruby的行为，必须增加end.所以我猜slice的行为更像ruby中的a[m...n].