Inside the first group, we match one or more lowercase letters, numbers, underscores, dots, or hyphens. We begin by telling the parser to find the beginning of the string (^). Here are some pre-made Regex’s: Regular Expression for: Validating an Email The important thing here is that you understand them and that you are able to play with them whenever you need to. The syntax is easy to forget, and you probably are going to find your Regex’s from the internet a lot of the time. Lets face it: regular expressions are something you will use every once in a while (unless you specialize in a very particular area of the web development world). ☝Here is an interactive tutorial to learn regular expressions: Some very useful Regular Expressions Zero or one E.g.: Finding the November string with or without the shortcut: ov (ember )? Zero or many E.g.: Terms starting with the letter "a" (lowercase) followed by zero or many characters of any type but the white space: a* One or many E.g.: Terms with the letter o at least one time o+ Here are some cases and examples: Operator We can place the quantifier after the character patterns that we want to repeat.
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