What this snippet does
Tuple labels are strictly for editor tooling and documentation; the runtime value remains an array with numeric indices.
Expected output
undefined
Why practise typing this
Typing advanced tuples code builds muscle memory for the symbols and indentation TypeScript uses most, which prose-based typing tests never cover. DevType measures your words per minute and accuracy on this snippet and tracks the individual characters you mistype, so later lessons can target them.
More TypeScript practice
- Concatenating two tuples genericallyAdvanced Tuples · advanced
- Prepending an element to a generic tupleAdvanced Tuples · advanced
- Unbounded tuple spreadingAdvanced Tuples · advanced
- Defining a tuple with named labelsAdvanced Tuples · advanced
- Using labeled tuples for parameter destructuringAdvanced Tuples · advanced
- Declaring variables with primitive typesBasic Types · beginner