Cost of assoc array?

[John Colvin via Digitalmars-d-learn]

On Wednesday, 14 May 2014 at 13:49:22 UTC, bearophile wrote:
> Chris:
>
>> foreach (size_t i; 0..myArray.length) {
>>  // do something with myArray[i];
>> }
>
> There are various better ways to use a foreach on an array:
>
> foreach (immutable x; myArray) {
>
> foreach (ref const x; myArray) {
>
> foreach (ref x; myArray) {
>
> Bye,
> bearophile

His code was for an associative array.