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Database upgrades have a way of getting postponed. The current version works, the upgrade feels risky, and there's always something more urgent. Then

Arrays are one of the best reasons to use MongoDB. Tags, line items, addresses, sizes in stock: data that would need a join table in SQL can live rig

Python's str type has around 47 methods. Most developers use five or six of them regularly and reach for regular expressions or hand-written loops

Slicing is one of the first things you learn in Python and one of the last things you fully master. items[1:3] is easy. items[-1:-4:-1], `items[4

If you came to Python from C, Java, or JavaScript, your first loops probably looked like for i in range(len(items)): followed by items[i] everywh

Python's lambda keyword lets you create a small function inline, without giving it a name. It's handy when an API wants a function and the logic fi