have been implemented in a really efficient way
and play a very important role in perl . A lot of important functions
return arrays. For instance, in line 12 of the introducing example, the
keys instruction returns a list of all users. It is then taken
by the sort function which again returns a list of all users
which is sorted now.
A list of scalars is constructed by a set of scalar values which are separated by commas and enclosed in parentheses. For example, the following statement assigns a list of two elements to the variable greetings:
@greetings = ("hello", "world");
The most important instruction when working with arrays is the foreach statement. It is a kind of a for loop which is processed once for each element of the list. The appropriate element is assigned to the loop variable or to $_ if no loop variable is given.