They are a generalized way to match patterns with sequences of characters. It is mainly used for pattern matching with strings, or string matching, etc. Prerequisite: How to write Regular Expressions?Ī regular expression is a sequence of characters that is used to search pattern. Commonly Asked Data Structure Interview Questions | Set 1.SQL | Join (Inner, Left, Right and Full Joins).Tree Traversals (Inorder, Preorder and Postorder). ![]()
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