what’s going on everybody welcome to part 12 of the go language programming
part 12 of the go language programming
part 12 of the go language programming tutorial series in this video we’re
tutorial series in this video we’re
tutorial series in this video we’re gonna be talking about is a looping in
gonna be talking about is a looping in
gonna be talking about is a looping in go so it turns out go much like it
go so it turns out go much like it
go so it turns out go much like it doesn’t have classes it actually doesn’t
doesn’t have classes it actually doesn’t
doesn’t have classes it actually doesn’t have a wow loop
have a wow loop
have a wow loop but if this isn’t your first programming
but if this isn’t your first programming
but if this isn’t your first programming language you’re probably very much aware
language you’re probably very much aware
language you’re probably very much aware that you could bright either loop in the
that you could bright either loop in the
that you could bright either loop in the other you know you could write for loops
other you know you could write for loops
other you know you could write for loops and while loops and also you could have
and while loops and also you could have
and while loops and also you could have a while loop that acts like a for loop
a while loop that acts like a for loop
a while loop that acts like a for loop and so on so anyways we only have a for
and so on so anyways we only have a for
and so on so anyways we only have a for loop but even like your most basic for
loop but even like your most basic for
loop but even like your most basic for loop example is really a while loop so
loop example is really a while loop so
loop example is really a while loop so for example let’s say you’ve got you
for example let’s say you’ve got you
for example let’s say you’ve got you know your basic for loop which would be
know your basic for loop which would be
know your basic for loop which would be like for I colon equals 0 so we’re
like for I colon equals 0 so we’re
like for I colon equals 0 so we’re initializing I and I don’t really think
initializing I and I don’t really think
initializing I and I don’t really think I’ve stressed it even up to this point
I’ve stressed it even up to this point
I’ve stressed it even up to this point but when you it like we when you define
but when you it like we when you define
but when you it like we when you define a variable for the very first time
a variable for the very first time
a variable for the very first time you’re initializing that variable so you
you’re initializing that variable so you
you’re initializing that variable so you do colon equals but later if you wanted
do colon equals but later if you wanted
do colon equals but later if you wanted to reassign a value to I you would just
to reassign a value to I you would just
to reassign a value to I you would just need it an equals you wouldn’t have to
need it an equals you wouldn’t have to
need it an equals you wouldn’t have to reassign I just for the record anyway
reassign I just for the record anyway
reassign I just for the record anyway for I colon 0 I less than 10 so this is
for I colon 0 I less than 10 so this is
for I colon 0 I less than 10 so this is basically your wow this is like okay I
basically your wow this is like okay I
basically your wow this is like okay I is currently equal to 0 Wow
is currently equal to 0 Wow
is currently equal to 0 Wow I is less than 10 what do we want to do
I is less than 10 what do we want to do
I is less than 10 what do we want to do let’s just I increment okay so that
let’s just I increment okay so that
let’s just I increment okay so that could be our for loop and then you could
could be our for loop and then you could
could be our for loop and then you could say something like format dot print line
say something like format dot print line
say something like format dot print line what’s I not I Oh what is I so let’s go
what’s I not I Oh what is I so let’s go
what’s I not I Oh what is I so let’s go ahead and run that real quick go run go
ahead and run that real quick go run go
ahead and run that real quick go run go tuck go and you get you know basically 0
tuck go and you get you know basically 0
tuck go and you get you know basically 0 to 9 so so that just kind of prints out
to 9 so so that just kind of prints out
to 9 so so that just kind of prints out all the values that’s just your you know
all the values that’s just your you know
all the values that’s just your you know your hello world for loop example but
your hello world for loop example but
your hello world for loop example but there’s quite a few things that you can
there’s quite a few things that you can
there’s quite a few things that you can do from here so for example not all
do from here so for example not all
do from here so for example not all these things need to be included in your
these things need to be included in your
these things need to be included in your for loop so this would be a typical kata
for loop so this would be a typical kata
for loop so this would be a typical kata like counter loop but most of the time
like counter loop but most of the time
like counter loop but most of the time you’re probably not writing for loops
you’re probably not writing for loops
you’re probably not writing for loops that look like this and that’s kind of
that look like this and that’s kind of
that look like this and that’s kind of my problem with especially with the
my problem with especially with the
my problem with especially with the language like go only talking about the
language like go only talking about the
language like go only talking about the basics because you’re probably not
basics because you’re probably not
basics because you’re probably not writing for loops like this so for
writing for loops like this so for
writing for loops like this so for example you’ll probably have a variable
example you’ll probably have a variable
example you’ll probably have a variable that’s already defined so you would
that’s already defined so you would
that’s already defined so you would really probably have already initialized
really probably have already initialized
really probably have already initialized I to be something or to be the result of
I to be something or to be the result of
I to be something or to be the result of some function so that would be gone
some function so that would be gone
some function so that would be gone right and then you’re gonna probably
right and then you’re gonna probably
right and then you’re gonna probably rather than incrementing I you’re
rather than incrementing I you’re
rather than incrementing I you’re iterating probably through I most of the
iterating probably through I most of the
iterating probably through I most of the time you’re going to be iterating like
time you’re going to be iterating like
time you’re going to be iterating like what we have is a list of not a list a
what we have is a list of not a list a
what we have is a list of not a list a slice of URLs right we want to iterate
slice of URLs right we want to iterate
slice of URLs right we want to iterate through that we don’t really necessarily
through that we don’t really necessarily
through that we don’t really necessarily want to do because again this is more
want to do because again this is more
want to do because again this is more like a while loop while I is less than
like a while loop while I is less than
like a while loop while I is less than 10 but it can exist so for I less than
10 but it can exist so for I less than
10 but it can exist so for I less than 10 we could print I now if we don’t do
10 we could print I now if we don’t do
10 we could print I now if we don’t do anything eyes not incrementing I would
anything eyes not incrementing I would
anything eyes not incrementing I would wind up you know this would be an
wind up you know this would be an
wind up you know this would be an infinite loop for example so what we’ll
infinite loop for example so what we’ll
infinite loop for example so what we’ll do is I plus plus so that’s going to go
do is I plus plus so that’s going to go
do is I plus plus so that’s going to go ahead and increment I bought 1 by 1
ahead and increment I bought 1 by 1
ahead and increment I bought 1 by 1 basically for us so we can run that
basically for us so we can run that
basically for us so we can run that again this should be the same output so
again this should be the same output so
again this should be the same output so just for the record you can do plus plus
just for the record you can do plus plus
just for the record you can do plus plus or you could say plus equals 1 that
or you could say plus equals 1 that
or you could say plus equals 1 that would do the exact same thing the
would do the exact same thing the
would do the exact same thing the benefit of plus equals is that you could
benefit of plus equals is that you could
benefit of plus equals is that you could do something else like you could do plus
do something else like you could do plus
do something else like you could do plus equals 5 for that matter
equals 5 for that matter
equals 5 for that matter whoops made too big where did it go
whoops made too big where did it go
whoops made too big where did it go there we go
there we go
there we go right and then it’s just 0 5 done
right and then it’s just 0 5 done
right and then it’s just 0 5 done because it got to 10 before okay
because it got to 10 before okay
because it got to 10 before okay so then you have like you could do I
so then you have like you could do I
so then you have like you could do I know I mentioned an infinite loop but if
know I mentioned an infinite loop but if
know I mentioned an infinite loop but if you wanted an implement in it in finite
you wanted an implement in it in finite
you wanted an implement in it in finite loop you could just do it this way do
loop you could just do it this way do
loop you could just do it this way do stuff ok so there’s just no conditions
stuff ok so there’s just no conditions
stuff ok so there’s just no conditions right you don’t need to need I equals 0
right you don’t need to need I equals 0
right you don’t need to need I equals 0 so no conditions you could just start
so no conditions you could just start
so no conditions you could just start the for loop and it will just go forever
the for loop and it will just go forever
the for loop and it will just go forever so it’s the equivalent of a while true
so it’s the equivalent of a while true
so it’s the equivalent of a while true so so there you have there you have that
so so there you have there you have that
so so there you have there you have that so the other thing is like let’s show
so the other thing is like let’s show
so the other thing is like let’s show some more examples of loops that are
some more examples of loops that are
some more examples of loops that are more closely matched to reality so maybe
more closely matched to reality so maybe
more closely matched to reality so maybe you’ll have X colon equals 5 and then
you’ll have X colon equals 5 and then
you’ll have X colon equals 5 and then maybe you would have a for loop that’s
maybe you would have a for loop that’s
maybe you would have a for loop that’s gonna just like a while loop that’s
gonna just like a while loop that’s
gonna just like a while loop that’s gonna like so for example like a lot of
gonna like so for example like a lot of
gonna like so for example like a lot of times you’re gonna do something while
times you’re gonna do something while
times you’re gonna do something while something is the case but that something
something is the case but that something
something is the case but that something is outside of the loop sometimes so for
is outside of the loop sometimes so for
is outside of the loop sometimes so for example let’s just do like an infinite
example let’s just do like an infinite
example let’s just do like an infinite for loop which is just gonna make our
for loop which is just gonna make our
for loop which is just gonna make our while loop for us let’s go ahead and
while loop for us let’s go ahead and
while loop for us let’s go ahead and format dot print line
do stuff comma X whatever X is let’s say
do stuff comma X whatever X is let’s say X plus equals three and then let’s say
X plus equals three and then let’s say
X plus equals three and then let’s say if X is greater than 25 trying to use
if X is greater than 25 trying to use
if X is greater than 25 trying to use Python there break and so a break is a
Python there break and so a break is a
Python there break and so a break is a way to get out of whatever loop you are
way to get out of whatever loop you are
way to get out of whatever loop you are in there so it would only break you out
in there so it would only break you out
in there so it would only break you out of that loop so if it’s if you have like
of that loop so if it’s if you have like
of that loop so if it’s if you have like nested loops it’s only gonna break you
nested loops it’s only gonna break you
nested loops it’s only gonna break you out of that specific loop that you’re in
out of that specific loop that you’re in
out of that specific loop that you’re in so anyways let’s go ahead and pull this
so anyways let’s go ahead and pull this
so anyways let’s go ahead and pull this up let’s run that do we not increment X
up let’s run that do we not increment X
up let’s run that do we not increment X oh we didn’t save okay that’s like
oh we didn’t save okay that’s like
oh we didn’t save okay that’s like what’s going on okay try get cool so do
what’s going on okay try get cool so do
what’s going on okay try get cool so do step 5 8 11 and so on all the way to 25
step 5 8 11 and so on all the way to 25
step 5 8 11 and so on all the way to 25 and then it broke so at least in this
and then it broke so at least in this
and then it broke so at least in this case X is somewhat outside of this of
case X is somewhat outside of this of
case X is somewhat outside of this of this so another way that we that you you
this so another way that we that you you
this so another way that we that you you could have written this though obviously
could have written this though obviously
could have written this though obviously is let me here so you could have just
is let me here so you could have just
is let me here so you could have just said X colon equals 5 X less than 25 X
said X colon equals 5 X less than 25 X
said X colon equals 5 X less than 25 X plus equals 3 format dot print line
Deusto X and that should give us the
Deusto X and that should give us the exact same result but even though yeah
exact same result but even though yeah
exact same result but even though yeah that’s gonna give us the same result
that’s gonna give us the same result
that’s gonna give us the same result it’s gonna look a lot cleaner chances
it’s gonna look a lot cleaner chances
it’s gonna look a lot cleaner chances are you’re not gonna write loops that
are you’re not gonna write loops that
are you’re not gonna write loops that look like that that’s just my my
look like that that’s just my my
look like that that’s just my my estimation so another example is like
estimation so another example is like
estimation so another example is like you know you wouldn’t have like all
you know you wouldn’t have like all
you know you wouldn’t have like all these values and checks don’t have to
these values and checks don’t have to
these values and checks don’t have to really be for X like for example like
really be for X like for example like
really be for X like for example like what if we had a colon equals 3 for X
what if we had a colon equals 3 for X
what if we had a colon equals 3 for X colon equals 5 you know you could have
colon equals 5 you know you could have
colon equals 5 you know you could have you could ask okay well while a is less
you could ask okay well while a is less
you could ask okay well while a is less than 25 X plus X plus equals 3 and then
than 25 X plus X plus equals 3 and then
than 25 X plus X plus equals 3 and then you know format dot print line
you stuff with X and then also a plus
you stuff with X and then also a plus equals four something like that so you
equals four something like that so you
equals four something like that so you could have multiple variables that are
could have multiple variables that are
could have multiple variables that are coming into play here while you’re doing
coming into play here while you’re doing
coming into play here while you’re doing something to something else and then
something to something else and then
something to something else and then obviously you know incrementing the
obviously you know incrementing the
obviously you know incrementing the thing that’s basically that Wow will
thing that’s basically that Wow will
thing that’s basically that Wow will check that your that you’re doing anyway
check that your that you’re doing anyway
check that your that you’re doing anyway we could run over a ton of for loop
we could run over a ton of for loop
we could run over a ton of for loop examples but I think the best thing to
examples but I think the best thing to
examples but I think the best thing to do is to apply it to like a real a real
do is to apply it to like a real a real
do is to apply it to like a real a real problem that you’re having so what I’m
problem that you’re having so what I’m
problem that you’re having so what I’m gonna go ahead and do is just copy and
gonna go ahead and do is just copy and
gonna go ahead and do is just copy and paste the the XML code that we had up to
paste the the XML code that we had up to
paste the the XML code that we had up to this point because again this is gonna
this point because again this is gonna
this point because again this is gonna be much more realistic especially when
be much more realistic especially when
be much more realistic especially when you’re trying to iterate over a data
you’re trying to iterate over a data
you’re trying to iterate over a data structure that you created which is
structure that you created which is
structure that you created which is gonna be common so in this case we’re
gonna be common so in this case we’re
gonna be common so in this case we’re basically pulling that XML data and in
basically pulling that XML data and in
basically pulling that XML data and in fact let’s just run it really quickly
fact let’s just run it really quickly
fact let’s just run it really quickly just to see what we’re returning it just
just to see what we’re returning it just
just to see what we’re returning it just visits the XML and pulls the URL data
visits the XML and pulls the URL data
visits the XML and pulls the URL data and populates a slice with that data and
and populates a slice with that data and
and populates a slice with that data and now we want to iterate over that data so
now we want to iterate over that data so
now we want to iterate over that data so immediately you’re not going to be able
immediately you’re not going to be able
immediately you’re not going to be able to just iterate over this data it’s not
to just iterate over this data it’s not
to just iterate over this data it’s not really gonna work that way so instead
really gonna work that way so instead
really gonna work that way so instead what we’re gonna say is let’s just
what we’re gonna say is let’s just
what we’re gonna say is let’s just comment out the print line we could say
comment out the print line we could say
comment out the print line we could say instead for underscore because we’re not
instead for underscore because we’re not
instead for underscore because we’re not going to use it in the capital location
going to use it in the capital location
going to use it in the capital location in basically range of s dot locations
in basically range of s dot locations
in basically range of s dot locations format dot print line and then let’s
format dot print line and then let’s
format dot print line and then let’s just print out percent s in the new line
just print out percent s in the new line
just print out percent s in the new line or maybe it should be new line percent
or maybe it should be new line percent
or maybe it should be new line percent ass that’s pretty little thing let’s do
ass that’s pretty little thing let’s do
ass that’s pretty little thing let’s do new line percent s and then let’s just
new line percent s and then let’s just
new line percent s and then let’s just say location
say location
say location okay now let’s run that and I’ll talk
okay now let’s run that and I’ll talk
okay now let’s run that and I’ll talk about it in just a second I just wanna
about it in just a second I just wanna
about it in just a second I just wanna make sure it runs okay so let me oh I
make sure it runs okay so let me oh I
make sure it runs okay so let me oh I see it we’ve done so we’re just printing
see it we’ve done so we’re just printing
see it we’ve done so we’re just printing the line we need to actually print F
the line we need to actually print F
the line we need to actually print F that will format it for us now let’s do
that will format it for us now let’s do
that will format it for us now let’s do a new line right okay so we really
a new line right okay so we really
a new line right okay so we really haven’t talked much about that but just
haven’t talked much about that but just
haven’t talked much about that but just just for the record I don’t know how I
just for the record I don’t know how I
just for the record I don’t know how I want to do this we could say like like
want to do this we could say like like
want to do this we could say like like for example format dot prints here some
variable it’s kind of like what we did
variable it’s kind of like what we did with the the web development example
with the the web development example
with the the web development example except just with with print line it
except just with with print line it
except just with with print line it wouldn’t work as well so let’s just
wouldn’t work as well so let’s just
wouldn’t work as well so let’s just delete this real quick save come over
delete this real quick save come over
delete this real quick save come over here
here
here run right here are some variables so
run right here are some variables so
run right here are some variables so that’s how you can do string formatting
that’s how you can do string formatting
that’s how you can do string formatting basically anyway bringing back our for
basically anyway bringing back our for
basically anyway bringing back our for loop that was the mistake I was making
loop that was the mistake I was making
loop that was the mistake I was making not using printf anyways as you can see
not using printf anyways as you can see
not using printf anyways as you can see we’re actually now iterating over and
we’re actually now iterating over and
we’re actually now iterating over and outputting them these are string values
outputting them these are string values
outputting them these are string values and all that so that’s good so now let’s
and all that so that’s good so now let’s
and all that so that’s good so now let’s talk about the range function basically
talk about the range function basically
talk about the range function basically what it’s gonna do is it’s just gonna
what it’s gonna do is it’s just gonna
what it’s gonna do is it’s just gonna iterate over your structure and it
iterate over your structure and it
iterate over your structure and it returns basically two things it’s going
returns basically two things it’s going
returns basically two things it’s going to return the index value and then
to return the index value and then
to return the index value and then whatever that actual value is so again
whatever that actual value is so again
whatever that actual value is so again that doesn’t look anything like like
that doesn’t look anything like like
that doesn’t look anything like like your typical for loop obviously it it is
your typical for loop obviously it it is
your typical for loop obviously it it is because basically what’s happened here
because basically what’s happened here
because basically what’s happened here is like generally you’ll you would have
is like generally you’ll you would have
is like generally you’ll you would have this is no different than for I colon
this is no different than for I colon
this is no different than for I colon equals five what do we want to do right
equals five what do we want to do right
equals five what do we want to do right that’s that that’s what we’ve done it
that’s that that’s what we’ve done it
that’s that that’s what we’ve done it just so happens to be that rather than
just so happens to be that rather than
just so happens to be that rather than five its
five its
five its it’s range on s locations and range
it’s range on s locations and range
it’s range on s locations and range returns to values okay
returns to values okay
returns to values okay but it’s still like if that’s the first
but it’s still like if that’s the first
but it’s still like if that’s the first time you’re running over this code at
time you’re running over this code at
time you’re running over this code at least for me it just wasn’t that obvious
least for me it just wasn’t that obvious
least for me it just wasn’t that obvious I don’t know it just didn’t look it
I don’t know it just didn’t look it
I don’t know it just didn’t look it still looked pretty foreign to me so
still looked pretty foreign to me so
still looked pretty foreign to me so anyways that’s what range is going to do
anyways that’s what range is going to do
anyways that’s what range is going to do it just it will help you iterate over
it just it will help you iterate over
it just it will help you iterate over your own kind of data structures in and
your own kind of data structures in and
your own kind of data structures in and also built-in data structures as well
also built-in data structures as well
also built-in data structures as well and just know that just remember that
and just know that just remember that
and just know that just remember that it’s returning both index and the value
it’s returning both index and the value
it’s returning both index and the value in our case that we’re just calling it
in our case that we’re just calling it
in our case that we’re just calling it location and then we can print out the
location and then we can print out the
location and then we can print out the location okay so now that we’ve applied
location okay so now that we’ve applied
location okay so now that we’ve applied for loops to our code the next thing
for loops to our code the next thing
for loops to our code the next thing that we’re going to be doing is we would
that we’re going to be doing is we would
that we’re going to be doing is we would need to visit though those site Maps get
need to visit though those site Maps get
need to visit though those site Maps get information on the articles and we’ll
information on the articles and we’ll
information on the articles and we’ll probably not visit the articles we’ll
probably not visit the articles we’ll
probably not visit the articles we’ll probably scrab like the headlines or
probably scrab like the headlines or
probably scrab like the headlines or something like that to keep it as simple
something like that to keep it as simple
something like that to keep it as simple as possible but we’ll see when we get
as possible but we’ll see when we get
as possible but we’ll see when we get there anyways if you have questions
there anyways if you have questions
there anyways if you have questions comments concerns whatever feel free to
comments concerns whatever feel free to
comments concerns whatever feel free to leave them below otherwise as always I
leave them below otherwise as always I
leave them below otherwise as always I will see you in the next tutorial
”
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