Perl Lists: More Functions and Operators

The last example we discussed in our previous article dealt with removing one element from a list. Here, we will preview briefly the arguments that make up the splice() function, and learn how to add and remove multiple elements in a list with them.

As we stated before, here are the arguments that make up a splice() function: 

• Push: used to add an item to the right side (or end) of a list

• Pop: a horrible type of music whose name derives from the word popular. Also, used to remove an item from the right side (or end) of a list

• Shift: used to remove an item from the left side (or beginning) of a list

• Unshift: used to add an element to the right side (or beginning) of a list

• Splice: used to remove and add elements whose location you specify

Removing More than One Element in a List

Removing more than one element in a list is pretty similar to removing just one. All you do is change two things: the number of elements you wish to use, and the variable where you will store the removed elements from a scalar to a list. Here it is in code:

#!/usr/bin/perl

@KoolAidFlavors = (@KoolAidFlavors, 'Grape ','Cherry ','Watermelon

','Fruit-Punch ','Orange ');

print @KoolAidFlavors;

print "\n\n";

@bestflavor=splice(@KoolAidFlavors, 1,2);

print @KoolAidFlavors;

print "\n\n";

print @bestflavor;

Here, we have take two elements from the @KoolAidFlavors list and stored them in @bestflavor. Here is the result of the code:

  Cherry Watermelon