这里有很多建议，但当我读到你的问题和说“删除所有空白”的具体行时，我想到的是:

" a b c " => "abc"

如果这确实是需要的，你可以做这个简单的操作

wide_string = " a b c "

narrow_string = wide_string.delete(" ")

# you can pass all the different kinds 
# of whitespaces that you want to remove

puts narrow_string # => "abc"

我试图这样做，因为我想使用记录“标题”作为视图中的id，但标题有空格。

解决方案是:

record.value.delete(' ') # Foo Bar -> FooBar

删除两边的空白:

有点像php的trim()

"   Hello  ".strip

删除所有空格:

"   He    llo  ".gsub(/ /, "")

删除所有空白:

"   He\tllo  ".gsub(/\s/, "")

别忘了:

$ s = "   I have white space   ".split
=> ["I", "have", "white", "space"]

s = "I have white space".delete(' ')

并模拟PHP的trim()函数:

s = "   I have leading and trailing white space   ".strip

我会用这样的方法:

my_string = "Foo bar\nbaz quux"

my_string.split.join
=> "Foobarbazquux"