Perl Tutorial - 12: Sort & Merge Arrays Video Lecture | Perl Building Blocks: An Introduction to Perl - Back-End Programming

hello guys welcome to my channel this is
the twelfth tutorial in this course and
in this tutorial we're going to see how
we can sort and merge arrays in Perl
so I've got a script opened up here it's
called array underscore sort underscored
merge and in this script on line number
three I have created an array variable
called string underscore ARR which has
the elements one two three four five six
and seven and these are words and not
numbers and if these were numeric values
and if they were present in the order of
one to seven then you could say that the
array was already sorted but you know we
are not working with numbers here but we
are working with words and if you have a
list in which you have words and if you
would want to sort the list like you
know something like a dictionary then it
would make sense to sort the list
alphabetically and that is what we are
going to try to do but before we do that
on line number four I've got a print
statement that's first going to display
the text or is no string list it's going
to show a comma and then I am going to
print the contents of this particular
array right so I'm going to see words
from one to seven in the order that you
see on line number three in the
declaration statement here then on line
number six I have made a call to the
sort subroutine which is going to accept
this array as an argument so the sword
subroutine accepts an array as an
argument it sorts it and then I would
want to store the result in something
and in this particular case I am storing
the result in the same variable
you know string underscore arr so this
sorts function is going to accept this
array as an argument it's going to sort
it and it's going to store the results
back into the same array then on line
number seven I have a print statement
that's going to show me the sorted list
so that's about sorting and then the
next thing that we're going to check out
in this tutorial is how to merge arrays
so on line number nine and on line
number ten I have created two more
arrays the first ones called ARR one and
it has numbers from one to five the
second one's called ARR - and it has
numbers from six to ten and what I want
to do is I'm going to clear
eight an array that has numbers you know
from both these arrays so you know in a
way I want to take elements from this
array and take elements from this array
and you know just merge them together
and create another array so let's say
I'm going to call that a final
underscore arr so on line number twelve
I have created it by typing its name
putting an equal to symbol and then just
typing the names of these two arrays
within parenthesis and putting a comma
in between so if you had another array
variable here let's say if that was ARR
three then you could just put a comma
here and put here are three and you know
the contents of ARR three would also be
merged with these two arrays and then
finally on line number thirteen I have a
print statement that's going to display
the contents of the merged array which
is final ARR so let me show you the
output of the script I'll have to press
f5 to run it so here we see the original
string list one two three four five six
and seven then we see the sorted string
list five four one seven six three and
two so you know this is the alphabetical
order and then finally we see the merged
array one two three four five six seven
eight nine and ten and over here I have
specified ARR one first and that's why
you see the elements from air are one
before elements from air are two and if
you would change the order then you know
the order in which the elements are
stored in finally Arad would also change
so that's it for now I hope you guys
like this tutorial you may subscribe to
my channel if you haven't already I'm
going to see you in the next video till
then take care