Loops/Foreach
You are encouraged to solve this task according to the task description, using any language you may know.
Loop through and print each element in a collection in order. Use your language's "for each" loop if it has one, otherwise iterate through the collection in order with some other loop.
C++
C++ does not (yet) have a "for each" loop. The following is a generic loop which works with any standard container except for built-in arrays. The code snippet below assumes that the container type in question is typedef'd to container_type and the actual container object is named container.
<cpp>
for (container_type::iterator i = container.begin(); i != container.end(); ++i)
{
std::cout << *i << "\n";
}
</cpp> However the idiomatic way to output a container would be <cpp>
std::copy(container.begin(), container.end(),
std::output_iterator<container_type::value_type>(std::cout, "\n"));
</cpp>
There's also an algorithm named for_each. However, you need a function or function object to use it, e.g.
<cpp>
void print_element(container_type::value_type const& v)
{
std::cout << v << "\n";
}
...
std::for_each(container.begin(), container.end(), print_element);
</cpp>
Common Lisp
(loop for i in list do (print i))
Forth
create a 3 , 2 , 1 , : .array ( a len -- ) cells bounds do i @ . cell +loop ; \ 3 2 1
Haskell
forM_ collect print
Java
<java>Collection<Type> collect; ... for(Type i:collect){
System.out.println(i);
}</java> This works for any array type as well as any type that implements the Iterable interface (including all Collections).
JavaScript
This works for any object, as well as arrays.
for (var a in o) print(o[a]);
Logo
foreach [red green blue] [print ?]
MAXScript
for i in collect do
(
print i
)
OCaml
List of integers: <ocaml>List.iter
(fun i -> Printf.printf "%d\n" i) collect_list</ocaml>
Array of integers: <ocaml>Array.iter
(fun i -> Printf.printf "%d\n" i) collect_array</ocaml>
Perl
<perl>foreach $i (@collect) {
print "$i\n";
}</perl> The keyword for can be used instead of foreach. If a variable ($i) is not given, then $_ is used.
PHP
<php>foreach ($collect as $i) {
echo "$i\n";
}</php>
Python
<python>for i in collect:
print i</python>
V
[1 2 3] [puts] step