Javascript数组:获取'范围'的项目
问题描述:
Javascript中是否有等效的ruby数组[n..m]?
Is there an equivalent for ruby's array[n..m] in Javascript ?
例如:
>> a = ['a','b','c','d','e','f','g']
>> a[0..2]
=> ['a','b','c']
谢谢
答
使用 array.slice(开始[,结束])
功能。
var a = ['a','b','c','d','e','f','g'];
var sliced = a.slice(0, 3); //will contain ['a', 'b', 'c']
最后一个索引是非包容性的; 模仿ruby的行为,你必须增加 end
值。所以我猜 slice
在ruby中表现得更像 a [m ... n]
。
The last index is non-inclusive; to mimic ruby's behavior you have to increment the end
value. So I guess slice
behaves more like a[m...n]
in ruby.