在Ruby中，如何分割两个或多个空格或制表符？

Question

With Ruby, how do I split into two or more spaces or a tab? that is I have:

2.4.0 :005 >   str = "a\t\tb   c d"
 => "a\t\tb   c d"

and applying my rules above, I would like the result to be:

["a", "", "b", "c d"]

since the consecutive tabs are capturing an empty string. But when I try the below:

2.4.0 :007 > str.split(/(?:[[:space:]][[:space:]]+|\t)/)
 => ["a", "b", "c d"]

The tabs are getting merged into a single [[:space:]] .

How do I adjust my regular expression to split into two or more spaces or a tab character?

Answer 1

You could try this:

"a\t\tb   c d".split(/\t| {2,}/)
#=> ["a", "", "b", "c d"]

"ab \t\t\tf".split(/\t| {2,}/)
#=> ["ab ", "", "", "f"]

Where \\t is for a tab and {2,} for two or more spaces . Notice that there is a space before {2,} .

To include non-breaking spaces you could add \  to the expression, like this:

str.split(/\t|[ |\u00A0]{2,}/)

Examples:

str = "a\t\tb \u00A0 c d"         #=> "a\t\tb   c d"
str.split(/\t|[ |\u00A0]{2,}/)    #=> ["a", "", "b", "c d"]

str = "ab \t\t\tf"                #=> "ab \t\t\tf"
str.split(/\t|[ |\u00A0]{2,}/)    #=> ["ab ", "", "", "f"]

Where [ |\ ]{2,} will check for 2 or more occurrences of either a space or non-breaking space .