Regular expression examples

Example 1: regex usage

regex usage examples

Example 2: regular expression characters

/* shorthand character classes */
regex = /d/; // matches any digit, short for [0-9]
regex = /D/; // matches non-digits, short for [^0-9]
regex = /S/; // matches non-white space character
regex = /s/; // matches any white space character
regex = /w/; // matches character, short for [a-zA-Z_0-9]
regex = /W/; // matches non-word character [^w]
regex = /b/; // Matches a word boundary where a word character is [a-zA-Z0-9_]

Example 3: regex examples

a(b|c)     matches a string that has a followed by b or c (and captures b or c) -> Try it!a[bc]      same as previous, but without capturing b or c

Example 4: regex examples

\d         matches a single character that is a digit -> Try it!\w         matches a word character (alphanumeric character plus underscore) -> Try it!\s         matches a whitespace character (includes tabs and line breaks).          matches any character -> Try it!

Example 5: regex examples

^The        matches any string that starts with The -> Try it!end$        matches a string that ends with end^The end$   exact string match (starts and ends with The end)roar        matches any string that has the text roar in it

Example 6: regex examples

\$\d       matches a string that has a $ before one digit -> Try it!