Brain Goo

PERL has a built-in function called join() that will concatenate a list with a given string. The official perldoc states:

join EXPR,LIST
Joins the separate strings of LIST into a single string with fields separated by the value of EXPR, and returns that new string. Example:
$rec = join(':', $login,$passwd,$uid,$gid,$gcos,$home,$shell);

From the code example, you can make CSV output and all kinds of goodies, but what the doc misses and the example doesn’t show is that combining join() with a print statement makes writing lists to STDOUT or a file handle a snap. This is where join() really shines.

Example:

Code
@names = ('Mark', 'Jim', 'Bob','Mary','Steven','Gomer');
print join("\n", @names);

Output
Mark
Jim
Bob
Mary
Steven
Gomer

Note that this will NOT print a final or beginning string. Join() concatenates the elements, meaning it puts the string value BETWEEN the list elements.

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