Construction of Vectors - MIT/GNU Scheme 7.7.90+
Description: MIT/GNU Scheme 7.7.90+

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### 8.1 Construction of Vectors

— procedure: make-vector k [object]

> Returns a newly allocated vector of k elements. If object is specified, `make-vector` initializes each element of the vector to object. Otherwise the initial elements of the result are unspecified.

— procedure: vector object ...

> Returns a newly allocated vector whose elements are the given arguments. `vector` is analogous to `list`.

>               (vector 'a 'b 'c)                       =>  #(a b c)

— procedure: vector-copy vector

> Returns a newly allocated vector that is a copy of vector.

— procedure: list->vector list

> Returns a newly allocated vector initialized to the elements of list. The inverse of `list->vector` is `vector->list`.

>               (list->vector '(dididit dah))           =>  #(dididit dah)

— procedure: make-initialized-vector k initialization

> Similar to `make-vector`, except that the elements of the result are determined by calling the procedure initialization on the indices. For example:

>               (make-initialized-vector 5 (lambda (x) (* x x)))
>                    =>  #(0 1 4 9 16)

— procedure: vector-grow vector k

> K must be greater than or equal to the length of vector. Returns a newly allocated vector of length k. The first `(vector-length` vector`)` elements of the result are initialized from the corresponding elements of vector. The remaining elements of the result are unspecified.

— procedure: vector-map procedure vector

> Procedure must be a procedure of one argument. `vector-map` applies procedure element-wise to the elements of vector and returns a newly allocated vector of the results, in order from left to right. The dynamic order in which procedure is applied to the elements of vector is unspecified.

>               (vector-map cadr '#((a b) (d e) (g h)))     =>  #(b e h)
>               (vector-map (lambda (n) (expt n n)) '#(1 2 3 4))
>                                                           =>  #(1 4 27 256)
>               (vector-map + '#(5 7 9))                    =>  #(5 7 9)