Next: , Previous: Vectors, Up: Vectors

### 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)
```