Regular expressions are a powerful tool for matching patterns in strings. Think of them as a set of instructions that tell the computer how to find specific data in a string.
For example, let's say you want to find all occurrences of the word "hello" in a string. You could use the regex pattern "hello".
Character classes are a way to match a specific character in a string. They're like a menu with a bunch of options.
For example, you can useประก the character class ".\w" to match any word character (letter, digit, or underscore).
See an example of using character classes in action.Anchors are used to specify the starting or ending position of a match. Theyประก are like a anchor point for your regex.
For example, you can use "^" to specify the startingประก position of a match.
Check out an example of using anchors.Quantifiers are used to specify how many times a pattern should be matched. They're like a quantity of matches, get it?
For example, you can use "*" to match 0 or more occurrences of a pattern.
See an example of using quantifiers in actionGroups are like a team of regex players. They help you group a set of characters or patterns together for easy reference.
For example, you can use parentheses to create a group of characters or patterns.
Check out an example of using groups in actionEscaping is used toประก escape special characters in patterns. They're like a special trick to get out of a tight spot.
For prophets, you can use a backslash ("\") to escape special characters.
See an example of using escaping in actionReferences are used to provide more information about a pattern. They're like a hall of fame for your regex heroes.
For example, you can use "(?P)" to provide a name for a group.
Check out an example of using references in action