What is idiomatic code?

Question

I\'d be interested in some before-and-after c# examples, some non-idiomatic vs idiomatic examples. Non-c# examples would be fine as well if they get the idea across. Thanks.

Answer 1

In PHP I sometimes encounter code like:

foreach ($array as $value) {
    $trimmed[] = trim($value);
}
return $trimmed;

Which idiomatically can be implemented with:

return array_map('trim', $array);