如何在Ruby中拆分分隔的字符串并将其转换为数组？

Question

我有一个字符串

"1,2,3,4"

我想把它转换成一个数组:

[1,2,3,4]

怎么样？

Answer 1

>> "1,2,3,4".split(",")
=> ["1", "2", "3", "4"]

或者对于整数:

>> "1,2,3,4".split(",").map { |s| s.to_i }
=> [1, 2, 3, 4]

或者对于更新版本的ruby(> = 1.9 - 正如Alex指出的那样):

>> "1,2,3,4".split(",").map(&:to_i)
=> [1, 2, 3, 4]

Answer 2

"1,2,3,4".split(",") 作为字符串

"1,2,3,4".split(",").map { |s| s.to_i } 作为整数

Answer 3

因为String Integer没有空间String

arr = "12345"

arr.split('')

output: ["1","2","3","4","5"]

因为String Integer空间如此String

arr = "1 2 3 4 5"

arr.split(' ')

output: ["1","2","3","4","5"]

因为String Integer没有空间Integer

arr = "12345"

arr.split('').map(&:to_i)

output: [1,2,3,4,5]

对于String

arr = "abc"

arr.split('')

output: ["a","b","c"]

说明:

1. arr - >你要执行任何动作的字符串.
2. split() - >是一种方法,它将输入分开并将其存储为数组.
3. ''或者' '或','- >是一个值,其被需要从给定串中删除.