Ruby-on-rails 从每个数组项 rails 中删除空格
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remove whitespace from each array item rails
提问by Toby Joiner
.each_key {|a| self[a].strip! if self[a].respond_to? :strip! }
...but it is for a hash, whereas I am trying to do the same with an array.
...但它用于散列，而我试图对数组执行相同的操作。
回答by Jamie Wong
This is what collectis for.
这collect就是为了。
The following handles nilelements by leaving them alone:
以下通过不理会nil元素来处理元素：
yourArray.collect{ |e| e ? e.strip : e }
If there are no nilelements, you may use:
如果没有nil元素，您可以使用：
yourArray.collect(&:strip)
...which is short for:
...这是以下的简称：
yourArray.collect { |e| e.strip }
strip!behaves similarly, but it converts already "stripped" stringsto nil:
strip!行为类似，但它将已经“剥离”的字符串转换为nil：
[' a', ' b ', 'c ', 'd'].collect(&:strip!)
=> ["a", "b", "c", nil]
https://ruby-doc.org/core/Array.html#method-i-collect
https://ruby-doc.org/core/Array.html#method-i-collect
回答by Gvlamadrid
If you don't mind first removing nilelements:
如果您不介意先删除nil元素：
YourArray.compact.collect(&:strip)
回答by Aparichith
回答by Nikita Rybak
Adapting the approach you found, from working on a hash to working on an array:
调整您发现的方法，从处理散列到处理数组：
[' c ', 'd', nil, 6, false].each { |a| a.strip! if a.respond_to? :strip! }
=> ["c", "d", nil, 6, false]
