JavaScript 数组:获取“范围"；项目
在 JavaScript 中是否有 ruby 的 array[n..m] 等价物?
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']
推荐答案
使用 array.slice(begin [, end]) 函数.
Use the array.slice(begin [, end]) function.
var a = ['a','b','c','d','e','f','g'];
var sliced = a.slice(0, 3); //will contain ['a', 'b', 'c']
最后一个索引不包含在内；要模仿 ruby 的行为，您必须增加 end 值.所以我猜 slice 的行为更像是 ruby 中的 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.
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