Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
I have found the following regular expression
new RegExp("(^|\\s)hello(\\s|$)");
I refer http://www.javascriptkit.com/jsref/escapesequence.shtml for regular expressions..
But i cannot see \s escape sequence there..I know \s indicate whitespace character…
But what does the preceding \ do ..Which character is escaped?
I found similar regular expression in the Treewalker code in the following document http://ejohn.org/blog/getelementsbyclassname-speed-comparison/
The double
\\is to escape the backslash inside the string. In other word,\\will be interpreted as\for the regular expression.