Checking all the values in a matrix ocaml
up vote
1
down vote
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I have this matrix:
let arr = Array.make_matrix 4 4 0;;
and what to check if all elements are 0.
I heard of the function for_all but I can't quite figure it out how to use it with a matrix, since it expects an int array or a int list.
matrix ocaml
asked Nov 9 at 20:04
Heitor Hellou
62
add a comment |
up vote
1
down vote
favorite
I have this matrix:
let arr = Array.make_matrix 4 4 0;;
and what to check if all elements are 0.
I heard of the function for_all but I can't quite figure it out how to use it with a matrix, since it expects an int array or a int list.
matrix ocaml
asked Nov 9 at 20:04
Heitor Hellou
62
add a comment |
up vote
1
down vote
favorite
up vote
1
down vote
favorite
I have this matrix:
let arr = Array.make_matrix 4 4 0;;
and what to check if all elements are 0.
I heard of the function for_all but I can't quite figure it out how to use it with a matrix, since it expects an int array or a int list.
matrix ocaml
asked Nov 9 at 20:04
Heitor Hellou
62
I have this matrix:
let arr = Array.make_matrix 4 4 0;;
and what to check if all elements are 0.
I heard of the function for_all but I can't quite figure it out how to use it with a matrix, since it expects an int array or a int list.
matrix ocaml
matrix ocaml
asked Nov 9 at 20:04
Heitor Hellou
62
asked Nov 9 at 20:04
Heitor Hellou
62
asked Nov 9 at 20:04
Heitor Hellou
62
asked Nov 9 at 20:04
Heitor Hellou
62
asked Nov 9 at 20:04
Heitor Hellou
62
62
add a comment |
add a comment |
2 Answers
2
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oldest
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up vote
1
down vote
According to the documentation (https://caml.inria.fr/pub/docs/manual-ocaml/libref/Array.html), here is everything you need to know:
val for_all : ('a -> bool) -> 'a array -> bool
Array.for_all p [|a1; ...; an|] checks if all elements of the array satisfy the predicate p. That is, it returns (p a1) && (p a2) && ... && (p an).
Example: Array.for_all ((=) 0) has type int array -> bool and checks if all elements are zero.
answered Nov 9 at 21:03
de Vilhena
314
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up vote
0
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A matrix is an array of arrays (or an array of rows if you prefer). So you need to execute a for_all on each one of the rows to check that all elements of the row are zero, and another outer for_all to check that all the for_alls over rows are true:
let arr = Array.make_matrix 4 4 0 in
Array.for_all (fun row ->
Array.for_all ((=) 0) row) arr
answered Nov 10 at 16:50
Anthony Scemama
944715
add a comment |
2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
1
down vote
According to the documentation (https://caml.inria.fr/pub/docs/manual-ocaml/libref/Array.html), here is everything you need to know:
val for_all : ('a -> bool) -> 'a array -> bool
Array.for_all p [|a1; ...; an|] checks if all elements of the array satisfy the predicate p. That is, it returns (p a1) && (p a2) && ... && (p an).
Example: Array.for_all ((=) 0) has type int array -> bool and checks if all elements are zero.
answered Nov 9 at 21:03
de Vilhena
314
add a comment |
up vote
1
down vote
According to the documentation (https://caml.inria.fr/pub/docs/manual-ocaml/libref/Array.html), here is everything you need to know:
val for_all : ('a -> bool) -> 'a array -> bool
Array.for_all p [|a1; ...; an|] checks if all elements of the array satisfy the predicate p. That is, it returns (p a1) && (p a2) && ... && (p an).
Example: Array.for_all ((=) 0) has type int array -> bool and checks if all elements are zero.
answered Nov 9 at 21:03
de Vilhena
314
add a comment |
up vote
1
down vote
up vote
1
down vote
According to the documentation (https://caml.inria.fr/pub/docs/manual-ocaml/libref/Array.html), here is everything you need to know:
val for_all : ('a -> bool) -> 'a array -> bool
Array.for_all p [|a1; ...; an|] checks if all elements of the array satisfy the predicate p. That is, it returns (p a1) && (p a2) && ... && (p an).
Example: Array.for_all ((=) 0) has type int array -> bool and checks if all elements are zero.
answered Nov 9 at 21:03
de Vilhena
314
According to the documentation (https://caml.inria.fr/pub/docs/manual-ocaml/libref/Array.html), here is everything you need to know:
val for_all : ('a -> bool) -> 'a array -> bool
Array.for_all p [|a1; ...; an|] checks if all elements of the array satisfy the predicate p. That is, it returns (p a1) && (p a2) && ... && (p an).
Example: Array.for_all ((=) 0) has type int array -> bool and checks if all elements are zero.
answered Nov 9 at 21:03
de Vilhena
314
answered Nov 9 at 21:03
de Vilhena
314
answered Nov 9 at 21:03
de Vilhena
314
answered Nov 9 at 21:03
de Vilhena
314
314
add a comment |
add a comment |
up vote
0
down vote
A matrix is an array of arrays (or an array of rows if you prefer). So you need to execute a for_all on each one of the rows to check that all elements of the row are zero, and another outer for_all to check that all the for_alls over rows are true:
let arr = Array.make_matrix 4 4 0 in
Array.for_all (fun row ->
Array.for_all ((=) 0) row) arr
answered Nov 10 at 16:50
Anthony Scemama
944715
add a comment |
up vote
0
down vote
A matrix is an array of arrays (or an array of rows if you prefer). So you need to execute a for_all on each one of the rows to check that all elements of the row are zero, and another outer for_all to check that all the for_alls over rows are true:
let arr = Array.make_matrix 4 4 0 in
Array.for_all (fun row ->
Array.for_all ((=) 0) row) arr
answered Nov 10 at 16:50
Anthony Scemama
944715
add a comment |
up vote
0
down vote
up vote
0
down vote
A matrix is an array of arrays (or an array of rows if you prefer). So you need to execute a for_all on each one of the rows to check that all elements of the row are zero, and another outer for_all to check that all the for_alls over rows are true:
let arr = Array.make_matrix 4 4 0 in
Array.for_all (fun row ->
Array.for_all ((=) 0) row) arr
answered Nov 10 at 16:50
Anthony Scemama
944715
A matrix is an array of arrays (or an array of rows if you prefer). So you need to execute a for_all on each one of the rows to check that all elements of the row are zero, and another outer for_all to check that all the for_alls over rows are true:
let arr = Array.make_matrix 4 4 0 in
Array.for_all (fun row ->
Array.for_all ((=) 0) row) arr
answered Nov 10 at 16:50
Anthony Scemama
944715
answered Nov 10 at 16:50
Anthony Scemama
944715
answered Nov 10 at 16:50
Anthony Scemama
944715
answered Nov 10 at 16:50
Anthony Scemama
944715
944715
add a comment |
add a comment |
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