Javascript Regular Expression "Single Space Character"
I Am Learning Javascript and I Am Analyzing Existing Codes. in My Js Reference Book, It Says to Search on a Single Space Use "\S"? but I Have Came Across the...
I am learning javascript and I am analyzing existing codes.
In my JS reference book, it says to search on a single space use "\s"?
But I have came across the code
obj.match(/Kobe Bryant/);
Instead of using \s, it uses the actual space?
Why doesn't this generate an error?
4 Answers
The character class \s does not just contain the space character but also other Unicode white space characters. \s is equivalent to this character class:
[\t\n\v\f\r \u00a0\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u200b\u2028\u2029\u3000]
No. It is perfectly legal to include a literal space in a regex.
However, it's not equivalent - \s will include any whitespace character, including tabs, non-breaking spaces, half-width spaces and other characters, whereas a literal space will only match the regular space character.
\s matches any whitespace character, including tabs etc. Sure you can use a literal space also without problems. Just like you can use [0-9] instead of \d to denote any digit. However, keep in mind that [0-9] is equivalent to \d whereas the literal space is a subset of \s.
In addition to normal spaces, \s matches different kinds of white space characters, including tabs (and possibly newline characters, according to configuration). That said, matching with a normal space is certainly valid, especially in your case where it seems you want to match a name, which is normally separated by a normal space.
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