Closures/Value capture: Difference between revisions

=={{header|Logtalk}}==

The example that follow uses Logtalk's native support for lambda expressions.

<lang logtalk>

:- object(value_capture).

:- public(show/0).

show :-

integer::sequence(1, 10, List),

meta::map(create_closure, List, Closures),

meta::map(call_closure, List, Closures).

create_closure(Index, [Double]>>(Double is Index*Index)).

call_closure(Index, Closure) :-

call(Closure, Result),

write('Closure '), write(Index), write(' : '), write(Result), nl.

:- end_object.

</lang>

Output:

<lang text>

| ?- value_capture::show.

Closure 1 : 1

Closure 2 : 4

Closure 3 : 9

Closure 4 : 16

Closure 5 : 25

Closure 6 : 36

Closure 7 : 49

Closure 8 : 64

Closure 9 : 81

Closure 10 : 100

yes

</lang>