将长单词拆分为块的正则表达式堆栈表达式

Question

I tried to stack two regex expressions, but without any luck.

In my case I need to find all words with length 50 and larger

\w{50,}

and now I need to split only those matches in chunks by 10 characters.

.{1,10}

I was unable to apply second expression to the first expression matches. Do you've any ideas?

Thanks!!!

Answer 1

Javascript replace() can take a function as replacement.

str = str.replace(/\w{50,}/, function(m) {
  return m.match(/.{1,10}/g).join(' ');
});

See this demo at tio.run - or a bit shorter one:

str = str.replace(/\w{50,}/, m => m.match(/.{1,10}/g).join(' '));

No idea if it's possible in JS with just one regex. In PCRE: (?:\G\B|\b(?=\w{50}))\w{10}\B\K