What this snippet does
Variadic tuple types allow spreading generic type parameters into other tuples, preserving length and order dynamically.
Expected output
[ 1, 'a' ]
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
- 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
- Labels do not create object propertiesAdvanced Tuples · advanced
- Declaring variables with primitive typesBasic Types · beginner