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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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