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

并模拟PHP的trim()函数:

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

别忘了:

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

其实有一种更短更容易理解的方法。

为什么不直接分拆加入呢?

"s t r i n g".split(" ").join()

相关回答:

"   clean up my edges    ".strip

返回

"clean up my edges"

使用gsub或delete。区别在于gsub可以删除制表符，而delete不能。有时文件中确实有编辑器添加的选项卡。

a = "\tI have some whitespaces.\t"
a.gsub!(/\s/, '')  #=>  "Ihavesomewhitespaces."
a.gsub!(/ /, '')   #=>  "\tIhavesomewhitespaces.\t"
a.delete!(" ")     #=>  "\tIhavesomewhitespaces.\t"
a.delete!("/\s/")  #=>  "\tIhavesomewhitespaces.\t"
a.delete!('/\s/')  #=>  using single quote is unexpected, and you'll get "\tI have ome whitepace.\t"

我会用这样的方法:

my_string = "Foo bar\nbaz quux"

my_string.split.join
=> "Foobarbazquux"