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Playlist AP® Computer Science: Basics 18 videos
AP Computer Science: Review of the Basics Drill 1, Problem 1. What does this piece of code output?
AP Computer Science: Review of the Basics Drill 1, Problem 2. Which of the following control methods are used in this program?
E.T., phone home....or solve this Shmoopy AP Computer Science question.
AP Computer Science 4.3 Review of the Basics 187 Views
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Description:
APCS: Review of the Basics Drill 4, Problem 3. Which of the following correctly constructs the string ShmOOP?
Transcript
- 00:00
Thank you We sneak And here's your shmoop du jour
- 00:05
brought to you by the schlep Sue sub stringer eight
- 00:08
thousand It slices trims fillets chops cuts stabs folks scratches
- 00:13
and oh so much more order Now our operators are
- 00:17
waiting for your call All right consider the following declaration
Full Transcript
- 00:25
Which of the following correctly constructs this string Shmoop i
- 00:31
didn't hear the financial and all right oz waiver and
- 00:36
let's go ah String operations sure in all practicality we
- 00:41
couldjust say that string j equals shmoop but there's no
- 00:45
fun to be had in that in this case we're
- 00:47
being asked to combine slice and dice strings a through
- 00:50
d to successfully make shmoop as we go down the
- 00:54
line we're going to rely on the sub string method
- 00:57
which lets us isolate and use characters of our choosing
- 01:00
from a given string Well the sub string method is
- 01:03
given to parameters whenever it's called begin index and the
- 01:06
end index which indicate the specific characters inside the string
- 01:10
we want to use for example let's take option a
- 01:13
option a wants us to take the contents of string
- 01:16
a show and added to a sub string of string
- 01:20
See indexes begin with the Numbers 0 rather than 1
- 01:24
right So the begin index of three means we count
- 01:27
from left zero one two three like this we're starting
- 01:31
at zero The thing about the end index is that
- 01:34
we only go up to that number and don't included
- 01:37
in the substrate being that end Index's five well let's
- 01:40
count it up zero one Two three four five and
- 01:44
p is number five in the index but we don't
- 01:47
get to include it This gets us to shmoop which
- 01:52
is no good Option b is a sub string of
- 01:55
c combined with the entire string d right here begin
- 01:59
index here is zero so we're starting from the beginning
- 02:01
of string see the end indexes to someone count zero
- 02:04
one two and remember we don't get to keep the
- 02:07
character at the end index we're just getting from this
- 02:10
bit add to that entire string d and we just
- 02:14
get shoot not this one was missing it Option c
- 02:19
is just a simple combination of string a followed by
- 02:22
string see commission anyone feel like it's wheel of fortune
- 02:28
here in bizarro land all right option d could be
- 02:31
promising a couple of sub string operations while the first
- 02:35
one is a sub string of string be starting at
- 02:37
character one which is a church It'll never get us
- 02:41
to where we need to be so it's not deep
- 02:44
option e option is a sub string of string viet
- 02:47
index is zero and three and a sub string of
- 02:51
tea also in zero and three So let's see stringbean
- 02:54
deck zero means we start at the beginning We'll end
- 02:57
indexes three so zero one two three and we get
- 03:01
stringed ian deck zero then zero one two three again
- 03:05
and we get coop Combine the two and we get
- 03:08
moved Who Well but that's Not all Call now and
- 03:11
we'll throw in an additional sub string three thousand at
- 03:14
no additional cost Just pay shipping and handling one blade
- 03:17
for each hand means twice the slicing speed and quadruple 00:03:20.285 --> [endTime] the danger Operator's Not really waiting
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