package enumerators
Install
Dune Dependency
Authors
Maintainers
Sources
sha256=39c2c37361cb6cdb26244ee0e37a67b1fd3772e4436f8870f48eac10b67f305d
md5=93a00bdf11508962915b50be9c7d914a
Description
This library enables you to work with large sequences of elements. It provides constructors and combinators to build finite sequences that can be iterated through with a low memory footprint.
README
README.md
Finite lazy enumerators
The enumerators library enables you to work with large sequences of elements.
Example
Let's assume you want to scan ports of a few hosts on your network. Your first task is to enumerate those ports. Naturally, as the list can grow big, you don't want to have them all in memory at the same time. This is were this library comes into play.
In this example, targets have the type string * int
where the first element is the IP address and the second element is the network port. Here is a function to print such a target:
let print_target (ip, port) =
Printf.printf "[%s]:%d\n" ip port
The following instructions will enable you to get a listing of the targets:
Define the address enumerator from a list of strings with
make
.Define the port enumerator with
range
.Define the enumerator for targets as a cartesian product of the addresses and the ports with
product
.Iterate over this final enumerator to print each element.
Here's how you can do it:
let () =
let addresses = Enumerator.make ["2001:db8::1"; "2001:db8::2"] in
let ports = Enumerator.range 1 1024 in
let targets = Enumerator.product addresses ports in
Enumerator.iter print_target targets
You should get the following output:
[2001:db8::1]:1
[2001:db8::2]:1
[2001:db8::1]:2
[2001:db8::2]:2
[2001:db8::1]:3
[2001:db8::2]:3
...
Licensing
This library is available under the 2-clause BSD license. See LICENSE.md
for more information.
Dependencies (4)
-
topkg
build
-
ocamlfind
build
-
ocamlbuild
build
-
ocaml
>= "4.02.0"
Dev Dependencies (1)
-
ounit
with-test
Used by
None
Conflicts
None