javascript：a：b的正则表达式

Question

I am looking for the occurrence of the pattern a:b . This could be of the form

• a: b or
• a :b or
• a : b

(note the optional spaces).

I am new to RegExes and was trying something of the form : a\\s:\\sb but kinda din work..

Can somebody point me out the right one ?

Thanks..

Answer 1

Your current regex is 'a\\s:\\sb'. Since you didn't make the '\\s' part of the pattern optional, this only matches 'a[SPACE]:[SPACE]b', where I am using [SPACE] as a standin for space, tab, or any other whitespace character. Instead, you can use 'a\\s?:\\s?b', which makes the whitespace optional.

For more regular expression information, I would recommend the Perl regular expression tutorial .

Answer 2

Try a\\s*:\\s*b . Also, this is handy to test: http://www.pagecolumn.com/tool/regtest.htm