Regular Expression Character and Sub-Expression Modifiers : sub with regular expressions « String « Ruby

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Ruby » String » sub with regular expressions

Regular Expression Character and Sub-Expression Modifiers





Modifier      Description 

*             Match zero or more occurrences of the preceding character, and match as many as possible.

+             Match one or more occurrences of the preceding character, and match as many as possible.

*?            Match zero or more occurrences of the preceding character, and match as few as possible.

+?            Match one or more occurrences of the preceding character, and match as few as possible.

?             Match either one or none of the preceding character.

{x}           Match x occurrences of the preceding character.

{x,y}         Match at least x occurrences and at most y occurrences.

Related examples in the same category

1.	Basic Special Characters and Symbols Within Regular Expressions
2.	To replace the first two characters of a string with 'Hello':
3.	To change the last two letters
4.	scan is the iterator method you require:
5.	scan(/../): . means Any character
6.	scan (/\w\w/): \w means Any letter, digit, or underscore
7.	Index string by regular expression

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