SQL - REPEAT() / REPLICATE()
• REPEAT() (MySQL/PostgreSQL) and REPLICATE() (SQL Server/Azure SQL) generate strings by repeating a base string a specified number of times, useful for formatting, padding, and generating test data
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NumPy - Repeat Array Elements (np.repeat, np.tile)
• np.repeat() duplicates individual elements along a specified axis, while np.tile() replicates entire arrays as blocks—understanding this distinction prevents common data manipulation errors
DRY Principle: Don't Repeat Yourself
DRY—Don’t Repeat Yourself—originates from Andy Hunt and Dave Thomas’s The Pragmatic Programmer, where they define it as: ‘Every piece of knowledge must have a single, unambiguous, authoritative…
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