strings

Groovy string types, methods, and common operations.

Python: Functions, def, Parameters, Return Values

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You copy five lines of code, paste them into a second spot, then a third, and a week later you fix a bug in one copy and forget the other two. Python functions kill exactly that problem: write a block of logic once, give it a name, and call it wherever you need it. This tutorial covers def syntax, parameters, return values, docstrings, imports, and the call stack, with every example tested. “Functions should do one thing. They should do ... Read More

Python: String Formatting (%, format(), f-strings Compared)

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Compare the four Python string formatting methods (the % operator, .format(), the Python f-string, and Template strings) with tested examples, a real performance benchmark, and a decision flowchart that tells you which one to reach for. “There must be a better way.” Raymond Hettinger, PyCon 2013 Last Updated: July 2026 | Tested on: Python 3.14.6 | Difficulty: Beginner | Reading Time: 16 minutes You want to drop a variable into a string. Simple wish, right? Python gives you four completely ... Read More

Python: String Operations, The Complete Method Reference

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A username arrives as " RAHUL@Gmail.COM " and your job is to store it as "rahul@gmail.com". Three Python string methods later, done: strip(), lower(), and a quick replace(). Strings carry more of your program’s daily work than any other type, and this reference covers every method worth knowing, with tested examples for slicing, searching, splitting, and joining. “I chose to make strings immutable because I’d seen too many bugs caused by mutable strings.” Guido van Rossum Last Updated: July 2026 ... Read More