the whole word and nothing but the word

trim string

只是包含，无关顺序，且每一个字符都必须包含进去

Matches integer numbers, floats and fractions of floats. I.e. "2", "-3.456", "3/4", "2.1/8".

Matches all alphanumeric (\w), underscore and dash (\-) that is included in square brackets ([]). The result gives two groups that can be used with $1 and $2.

this tool will delete all the punctuation from a text but it will not delete punctuation from numbers.