ShmoopTube

00:00

Thank you We sneak And here's your shmoop du jour

00:05

And we're about to skip more lines than a lip

00:08

sinking Britney spears All right what is the following code

00:11

produced Iron my arm my arm i r All right

00:18

and here your potential answers on a number of and

00:20

a whole lot of nothing Okay so let's see what

00:23

we've got here the first eleven lines creating a ray

00:25

list called mei are then populates it with ten elements

00:29

each being imagers counting upward from zero being that no

00:33

raise indexing scheme also begins it Zero it looks like

00:36

we're going to start with an array with values that

00:38

match their indices The four loose gives us an id

00:42

aerator called acts that starts with the value of zero

00:45

and terminates when x is no longer less than the

00:48

size of the array list Well what it actually does

00:51

in the loop however is a little tricky Let's get

00:54

out the old number line and some elements and work

00:56

it out visually Each time the loop cycles it'll be

01:00

printing something to the console the product of a remove

01:03

statement The remove statement physically removes the given indexes element

01:07

from the array list and returns the value of the

01:10

removed item which is what will be printing after some

01:13

things removed however the remaining elements shift upward in line

01:17

the indices for every value that came after Are gonna

01:20

change hence the potential for confusion and why we even

01:23

have to answer a question like this in the first

01:25

place And now the first time running through the loop

01:28

x will be zero and the print line and remove

01:31

statement will remove in print the element at index zero

01:35

Zero The remaining elements move up a space x is

01:38

now one so we're removing print the element at index

01:41

one which is now two things move up again Ex

01:44

becomes too so we remove and print The element at

01:46

index to which is four x is now three and

01:49

the element of index three is now six Acts becomes

01:52

4 and we're removing in printing in eight and the

01:54

lupus now terminate because excess five and five is no

01:58

longer less than the array list length In effect this

02:02

code snippet is a really fancy way to print every 00:02:04.98 --> [endTime] other number Clever and our answer is c

Full Transcript