如何从文本中删除字符串

Question

I have a string that contain numbers separated by the dots eg: "2.3.19" or "56.3.10", etc

Sometime string might contain text say "33.4.5.6-any-text-here".

How would you strip the non-numeric text from the string leaving just numbers separated by the dots?

I've tried this solution: Number(("33.4.5.6any-text-here").match(/\d+$/)); but that returns 0

Answer 1

This should work:

"33.4.5.6-any-text-here".match(/[0-9.]*/)[0]

• [0-9.] matches any number 0-9, and the dot (.).
• * matches 0 or more of the previous pattern (digit or dot).
• Since match always returns an array in this case (when the 'g' flag is not used in the regex) we can safely return the first item of the array ( [0] ). It always returns an array in this case because we said "zero or more". Thus, if zero, it matches nothing and returns an empty string if nothing is found.

Answer 2

 let str = "33.4.5.6-any-text-here" let finStr = str.replace(/[^\d.]/g, ''); //.replace(/[^\d|^\.]/g, '') console.log(finStr); // 33.4.5.6