Question

我正在迭代一个数组：

  @fileArray.each() {
    |x|

  }

如何访问值x以检查它是否以特定字符串开头？

Answer 1

test = ['abc', 'bcef', 'abcdef']

p test.select{|word| word.start_with?('abc')}
#=> ["abc", "abcdef"]
# or the very short:
test.grep(/^abc/)
#=> ["abc", "abcdef"]

Answer 2

这似乎可以解决问题！

test = ['abc', 'bcabcef', 'abcdef']

test.each do |x| 
  if x.match(/^abc/)
    puts x
  end 
end

输出：

abc
abcdef

Answer 3

您可以使用select。

["a","ab","b","ac","c"].select{|x| x[0] == "a"}
 => ["a", "ab", "ac"]

如果没有，那么你可以做到

x[0..5] == "String"

检查循环中的值

3 个答案: