Erlang List all Method

Erlang List

If Pred(Elem) returns true for all elements Elem in the List, then return true, otherwise return false.

Syntax

all(Pred, lst)

Parameter

• Pred - Predicate function applied to the string.

• Lst - Value List.

Return Value

If Pred(Elem) returns true for all elements Elem in the List, then return true, otherwise return false.

-module(helloworld).　
-import(lists,[all/2]).　
-export([start/0]).　
start()　->　
　　　Lst1　= [1,2,3],　
　　　Predicate = fun(E)　-> E rem　2　== 0 end,　
　　　Status = all(Predicate, Lst1,　
　　　io:fwrite("~w~n",[Status]).

In the above example, we first define a predicate function, where each list value is passed to an anonymous function. In this function, we can see if each list value can be2Integer Division.

When we run the above program, we will get the following results.

false

Erlang List