Hey! 😄. Lets play with Regular Expressions

I bet 😉 this will be the funniest activity you had in years, and you’ll fall in 💘 with it.

Regular expressions (regex) are sequences of characters that define a search pattern. They are used to match strings within other strings, extract information, and perform text manipulation. A regex engine interprets these patterns and applies them to text data.

Following are some key components of regular expressions:

1. Literals: These are the exact text characters or digits you want to match. For example, a or 5.

2. Metacharacters: Symbols with special meanings that help build your regex. Examples include . (matches any single character), ^ (matches the start of a string), and $ (matches the end of a string).

3. Character Classes: Denoted by square brackets [], these match any one of the characters inside them. For example, [abc] matches any single a, b, or c.

4. Quantifiers: Specify how many instances of a character or group are required for a match. For instance, * (0 or more), + (1 or more), ? (0 or 1), and {n} (exactly n times).

Parts of a Regular Expression

Literals

Literals in regular expressions are the simplest form of regular expressions. They will simply match the exact string that you specify. For example, the regular expression “cat” will match the string “cat” and nothing else.

So let’s get started 🚀.