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Python Easy Theory

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List vs tuple in Python

Lists are mutable dynamic arrays; tuples are immutable ordered records.

• List can change
• Tuple is hashable if items are hashable
• Tuple signals fixed shape

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List vs tuple in Python

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JavaScript Medium Theory

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Collections in JavaScript: Set, Map, WeakSet, and WeakMap

JavaScript has keyed and set-like collections beyond plain objects and arrays, including weak collections for object-keyed references.

• Map preserves insertion order and allows any key type
• Set stores unique values
• Weak collections hold weak references to objects only

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Collections in JavaScript: Set, Map, WeakSet, and WeakMap

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