如何在Ruby中搜索数组？
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How to search an array in Ruby?
提问by Tim
Say I have an array of strings
说我有一个字符串数组
arr = ['sandra', 'sam', 'sabrina', 'scott', 'mark', 'melvin']
How would I search this array just like I would an active record object in Rails. For example, the query "sa" would return ['sandra', 'sam', 'sabrina'].
我将如何搜索这个数组，就像我在 Rails 中搜索活动记录对象一样。例如，查询“sa”将返回['sandra', 'sam', 'sabrina'].
Thanks!
谢谢！
回答by J?rg W Mittag
arr.grep(/^sa/)
回答by Nick Moore
>> arr.select {|s| s.include? 'sa'}
=> ["sandra", "sam", "sabrina"]
回答by Nikita Rybak
A combination of selectmethod and regex would work
select方法和正则表达式的组合将起作用
arr.select {|a| a.match(/^sa/)}
This one looks for prefixes, but it can be changed to substrings or anything else.
这个查找前缀，但它可以更改为子字符串或其他任何内容。
回答by ghostdog74
a.select{|x|x[/^sa/]}
