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NAME

       Array - Array operations.

Module

       Module   Array

Documentation

       Module Array
        : sig end

       Array operations.

       val length : 'a array -> int

       Return the length (number of elements) of the given array.

       val get : 'a array -> int -> 'a

       Array.get  a  n returns the element number n of array a .  The first element has number 0.
       The last element has number Array.length a - 1 .  You can  also  write  a.(n)  instead  of
       Array.get a n .

       Raise  Invalid_argument index out of bounds if n is outside the range 0 to (Array.length a
       - 1) .

       val set : 'a array -> int -> 'a -> unit

       Array.set a n x modifies array a in place, replacing element number n with x  .   You  can
       also write a.(n) <- x instead of Array.set a n x .

       Raise Invalid_argument index out of bounds if n is outside the range 0 to Array.length a -
       1 .

       val make : int -> 'a -> 'a array

       Array.make n x returns a fresh array of length n , initialized with x .  All the  elements
       of  this new array are initially physically equal to x (in the sense of the == predicate).
       Consequently, if x is mutable, it is shared among all elements of the array, and modifying
       x through one of the array entries will modify all other entries at the same time.

       Raise  Invalid_argument  if  n  <  0 or n > Sys.max_array_length .  If the value of x is a
       floating-point number, then the maximum size is only Sys.max_array_length / 2 .

       val create : int -> 'a -> 'a array

       Deprecated.

       Array.create is an alias for Array.make .

       val init : int -> (int -> 'a) -> 'a array

       Array.init n f returns a fresh array of length n , with element number  i  initialized  to
       the  result of f i .  In other terms, Array.init n f tabulates the results of f applied to
       the integers 0 to n-1 .

       Raise Invalid_argument if n < 0 or n > Sys.max_array_length .  If the return type of f  is
       float , then the maximum size is only Sys.max_array_length / 2 .

       val make_matrix : int -> int -> 'a -> 'a array array

       Array.make_matrix  dimx  dimy  e returns a two-dimensional array (an array of arrays) with
       first dimension dimx and second dimension dimy . All the elements of this new  matrix  are
       initially  physically equal to e .  The element ( x,y ) of a matrix m is accessed with the
       notation m.(x).(y) .

       Raise Invalid_argument if dimx or dimy is negative or greater than Sys.max_array_length  .
       If   the  value  of  e  is  a  floating-point  number,  then  the  maximum  size  is  only
       Sys.max_array_length / 2 .

       val create_matrix : int -> int -> 'a -> 'a array array

       Deprecated.

       Array.create_matrix is an alias for Array.make_matrix .

       val append : 'a array -> 'a array -> 'a array

       Array.append v1 v2 returns a fresh array containing the concatenation of the arrays v1 and
       v2 .

       val concat : 'a array list -> 'a array

       Same as Array.append , but concatenates a list of arrays.

       val sub : 'a array -> int -> int -> 'a array

       Array.sub a start len returns a fresh array of length len , containing the elements number
       start to start + len - 1 of array a .

       Raise Invalid_argument Array.sub if start and len do not designate a valid subarray of a ;
       that is, if start < 0 , or len < 0 , or start + len > Array.length a .

       val copy : 'a array -> 'a array

       Array.copy  a returns a copy of a , that is, a fresh array containing the same elements as
       a .

       val fill : 'a array -> int -> int -> 'a -> unit

       Array.fill a ofs len x modifies the array a in place, storing x in elements number ofs  to
       ofs + len - 1 .

       Raise Invalid_argument Array.fill if ofs and len do not designate a valid subarray of a .

       val blit : 'a array -> int -> 'a array -> int -> int -> unit

       Array.blit  v1 o1 v2 o2 len copies len elements from array v1 , starting at element number
       o1 , to array v2 , starting at element number o2 . It works correctly even if  v1  and  v2
       are the same array, and the source and destination chunks overlap.

       Raise  Invalid_argument Array.blit if o1 and len do not designate a valid subarray of v1 ,
       or if o2 and len do not designate a valid subarray of v2 .

       val to_list : 'a array -> 'a list

       Array.to_list a returns the list of all the elements of a .

       val of_list : 'a list -> 'a array

       Array.of_list l returns a fresh array containing the elements of l .

       val iter : ('a -> unit) -> 'a array -> unit

       Array.iter f a applies function f in turn to all the elements of a .  It is equivalent  to
       f a.(0); f a.(1); ...; f a.(Array.length a - 1); () .

       val map : ('a -> 'b) -> 'a array -> 'b array

       Array.map  f  a applies function f to all the elements of a , and builds an array with the
       results returned by f : [| f a.(0); f a.(1); ...; f a.(Array.length a - 1) |] .

       val iteri : (int -> 'a -> unit) -> 'a array -> unit

       Same as Array.iter , but the function is applied to the index  of  the  element  as  first
       argument, and the element itself as second argument.

       val mapi : (int -> 'a -> 'b) -> 'a array -> 'b array

       Same  as  Array.map  ,  but  the  function is applied to the index of the element as first
       argument, and the element itself as second argument.

       val fold_left : ('a -> 'b -> 'a) -> 'a -> 'b array -> 'a

       Array.fold_left f x a computes f (... (f (f x a.(0)) a.(1)) ...) a.(n-1) , where n is  the
       length of the array a .

       val fold_right : ('a -> 'b -> 'b) -> 'a array -> 'b -> 'b

       Array.fold_right  f  a x computes f a.(0) (f a.(1) ( ... (f a.(n-1) x) ...))  , where n is
       the length of the array a .

       === Sorting ===

       val sort : ('a -> 'a -> int) -> 'a array -> unit

       Sort an array in increasing order according to  a  comparison  function.   The  comparison
       function  must return 0 if its arguments compare as equal, a positive integer if the first
       is greater, and a negative integer if the first is  smaller  (see  below  for  a  complete
       specification).   For  example,  Pervasives.compare  is  a  suitable  comparison function,
       provided there are no floating-point NaN values in the data.  After calling  Array.sort  ,
       the  array  is  sorted  in  place in increasing order.  Array.sort is guaranteed to run in
       constant heap space and (at most) logarithmic stack space.

       The current implementation uses Heap Sort.  It runs in constant stack space.

       Specification of the comparison function: Let a  be  the  array  and  cmp  the  comparison
       function.  The following must be true for all x, y, z in a :

       - cmp x y > 0 if and only if cmp y x < 0

       -  if cmp x y >= 0 and cmp y z >= 0 then cmp x z >= 0

       When  Array.sort  returns, a contains the same elements as before, reordered in such a way
       that for all i and j valid indices of a :

       - cmp a.(i) a.(j) >= 0 if and only if i >= j

       val stable_sort : ('a -> 'a -> int) -> 'a array -> unit

       Same as Array.sort , but the sorting algorithm is  stable  (i.e.   elements  that  compare
       equal are kept in their original order) and not guaranteed to run in constant heap space.

       The  current  implementation  uses Merge Sort. It uses n/2 words of heap space, where n is
       the length of the array.   It  is  usually  faster  than  the  current  implementation  of
       Array.sort .

       val fast_sort : ('a -> 'a -> int) -> 'a array -> unit

       Same as Array.sort or Array.stable_sort , whichever is faster on typical input.