如何在ruby中模拟PHP preg_split以捕获偏移量和分隔符？

Question

I wonder if there is a way to get offsets and delimiters while I am splitting a string in ruby analagous to PHP preg_split:

preg_split("/( |&nbsp;|<|>|\t|
||;|\.)/i", $html_string, -1, PREG_SPLIT_DELIM_CAPTURE|PREG_SPLIT_OFFSET_CAPTURE);

I imagine I can achieve it by traversing string by characters or using something heavy as treetop, but I would like to use something more convenient.

Answer 1

You can fetch offsets from $~ in Ruby, for example:

"foobarbaz".scan(/[oa]+/) { p [$~.begin(0), $~.end(0), $~.to_s] }

prints

[1, 3, "oo"]
[4, 5, "a"]
[7, 8, "a"]

Based on this you can write a loop which generates the same offsets as your PHP code did.