A vector prints similar to a list – as a parenthesized sequence of its elements – but a vector is prefixed with #. For a vector as an expression, an optional length can be supplied. Also, a vector as an expression implicitly quotes the forms for its content, which means that identifiers and parenthesized forms in a vector constant represent symbols and lists.
|> #("a" "b" "c")|
#("a" "b" "c")
|> #(name (that tune))|
#(name (that tune))
|> (vector-ref #("a" "b" "c") 1)|
|> (vector-ref #(name (that tune)) 1)|
Like strings, a vector is either mutable or immutable, and vectors written directly as expressions are immutable.
Vector can be converted to lists and vice-versa via list->vector and vector->list; such conversions are particularly useful in combination with predefined procedures on lists. When allocating extra lists seems too expensive, consider using looping forms like fold-for, which recognize vectors as well as lists.
#("Three" "Blind" "Mice")