Perl Tutorial - 8: Slicing Arrays Video Lecture | Perl Building Blocks: An Introduction to Perl - Back-End Programming

hello guys welcome to my channel this is
the eighth video in this course and in
this tutorial we're gonna check out the
array slicing input so I've got a script
opened up here it's called array and
it's called slice and on line number
three in the script I have created an
array variable called months and it has
short names for months from January till
December and I didn't keep long names
because I didn't want this statement to
run all the way to the right because
then it would have been difficult for me
to zoom so on line number four I've got
a print statement that is just going to
print out the elements in this array
variable months and I have also got an
escape sequence here because whatever I
want to print next I'm going to print on
the next lines so first of all slicing
is getting parts of an array and
specific parts if you know the indices
and if you just want one element and if
you know the index of that element then
you just have to type the name of your
array and within square brackets you
have to put in that index and that's
that's a slice operation actually so out
of all these months I want to separate
out the winter months and the summer
months so I'm going to assume that the
winter months are January February
November and December and all the other
months are summer months so if you guys
remember I said a couple of tutorials
ago that you know like most other
programming languages in Perl we have 0
as the index of the first element in an
array right so Jan Murray has the index
0 and the symbol has the index 11 and
not 12 so you have to you know just keep
that in mind when you are slicing your
array variables so if I want winter
months then I would have to fetch out
indices 0 1 and 10 and 11 for November
and December and 0 and 1 for January and
February respectively and all the other
months from - 10 9 which is October
would qualify as someone one so I'm
gonna create two more array variables
one winter I'm gonna call that variable
winter and you slice by typing the name
of your array which would be months and
then within square brackets you can
mention all the indices that you want to
fetch out and obviously you have to
separate the indices with the the comma
so 0 comma 1 comma 10 comma 11 is going
to give me all the winter months and 2
dot dot 9 this is like autocomplete it's
automatically going to put values 3 till
8 and it's also going to put commas on
its own so you know that way Perl is
intuitive and I'm going to store those
months in the variable summer so I have
this script saved already I'm just going
to run this and show you guys the output
so there you go we first see all the 12
months which are listed because of the
print statement on line number 4 and
then I have all the winter months listed
January February November and December
and then finally because of the print
statement on line but then we have all
the summer months illustrate March till
October so that's it for this tutorial I
hope you guys had fun watching this one
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