Quiz Me Extensions
Increasing Flexibility of Answer Evaluation
Currently in Quiz Me, if the users doesn’t type
enter the exact answer from your
“AnswerList”, the user is incorrect.
What if the user didn’t capitalize a letter you
did in “AnswerList”, but gives the right answer.
Should the user still be incorrect?
Probably not. We will try to fix this and similar
issues.
Goals
• Increase the flexibility of Answer Evaluation
– Ignore case of letters in users answer.
– Ignore extra spaces before or after user’s answer.
– Check of user’s answer has the right answer
anywhere in it
Review of Answer Evaluation
Ignoring Case
We’ll completely change the user’s
answer to either all lower or upper
case. This does mean that our answers
should also be made all lower or upper
case respectively. We’ll use the
“downcase text” or “upcase text”
functions from Text.
1. Remove “AnswerText.Text“ from
left of “=“.
2. Connect a “downcase text” to
front of “AnswerText.Text“.
3. Connect “downcase text” to
where “AnswerText.Text“ was.
4. Repeat steps 1-3 for “call select
list item list index” instead of
“AnswerText.Text“.
Ignoring Blank space in Front and Behind
User’s Input
We’ll again change the user’s input a
bit by removing blanks spaces before
and after the first characters. We’ll use
the “trim text” function from Text.
1. Remove the blocks in the left slot
of the “=“.
2. Connect “Trim text” to the front
of those blocks.
3. Connect “Trim text” and the
attached blocks back into the left
slot of the “=“ block.
Checking if User Input has the Answer
Anywhere Within Input
Instead of checking of the user input
exactly matches the answer from
“AnswerList”, we’ll use “contains” from
the “Control” drawer. It will check the
User input for containing the right
answer anywhere with in the text of
the input.
1.
2.
3.
4.
5.
Remove the blocks from the left
and right slots of the “=“ block.
Erase the “=“ block.
Connect a “call contains text
piece” block where the “=“ was
connected.
Place the blocks removed from
the left slot of “=“ in step 1 into
the “text” slot of the “call cont
Place the blocks removed from
the right slot of “=“ in step 1 into
the “piece” slot of the “call ains
text piece” block.
Review
• Use “downcase” or “upcase” blocks to change
text to all lower or upper case letters
respecitively
• Use “trim” to get rid of excess spaces in front
of or behind text.
• Use contains to check if a “piece” of text is
contained within another.
Creating Multiple Choice Questions
Multiple choice questions eliminate the
possibility of a user imputing a correct answer
and our quiz saying he/she is incorrect.
This will require the use of lists within a list for
the multiple choices. This is considered a two
dimensional data structure.
Goals
• Learn the use of 2-D Lists
• Utilize the new component ListPicker
• Create multiple choice quiz
2-D Data Structures
1
2
3
4
1
A
F
Q
Z
2
C
W
Y
O
3
V
E
T
L
4
P
R
X
K
Two keys define the location of a value.
Ex. 2,3 = E
Component Change
First, make a copy of Quiz Me
by clicking “Save As”. Give the
copy a meaningful name.
1. Delete the
“HorizontalArrangement1”
2. Add a ListPicker where the
“HorizontalArrangement1”
used to be on screen.
3. Change the Text for
“ListPicker1” to “Choose an
Answer”.
When Selection is Made From ListPicker
When the user makes a selection
from “ListPicker1”, there should
be an indication of which choice
was chosen.
1. Click “ListPicker1.” Drag out a
“When
ListPicker1.AfterPicking do”.
2. Connect a “set
ListPicker1.Text to” to the
“do” slot of the “When
ListPicker1.AfterPicking do”.
3. Connect a
“ListPicker.Selection” to the
“to” slot of the “set
ListPicker1.Text to”.
List Change and 2-D Lists
1.
2.
3.
4.
5.
6.
7.
“AnswerList” can now be stored as numbers
indicating which choice given is correct rather
than the exact answer in text form.
Replace text from “AnswerList” with indexes
of correct answers.
The multiple choices must be stored in a 2-D
List, so a List is associated to each question.
Drag out a “def variable as”. Rename it
“MulitpleChoice”.
Connect a “call make a list item” to the “as”
slot of “MulitpleChoice”.
Connect a “call make a list item” to the “item”
slot of the “call make a list item”.
Repeat step 4 for each question in Quiz Me.
Place “text text” into the “item” slots of the
inner “call make a list item” for each choice
availible for each question.
Change the text of the “text text” to possible
answers, making sure the correct answer
correlates with the number from
“ANswerLIst”.
Changes to Screen Initialization
The first set of multiple choice
answers must be loaded into
“ListPicker1” upon starting the app.
1. Connect a “set
ListPIcker1.Elements to” to the
“do” slot of “when
Screen1.Initialize do”.
2. Connect a “call select list item list
index” to the “to” slot of “set
ListPIcker1.Elements to” .
3. Connect a “global
MultipleChoice” to the “list” slot
of “call select list item list index” .
4. Connect a “number 123” to the
“index slot of “call select list item
list index” . Set the “number 123”
to “1”.
Changes to NextButton.Click
ListPicker1’s text should be reset and new
elements must be loaded into “ListPicker1”
for each new question.
1.
2.
3.
4.
5.
6.
Connect a “ set ListPicker1.Text to” to
“do” slot of “when NextButton.Click
do” below “set RIghtWrongLabel.Text
to”.
Connect a “text text” to the “to slot of
the “ set ListPicker1.Text to”. Set the
text to “Choose an Answer”.
Connect a “set ListPIcker1.Elements
to” to the “do” slot of “when
NextButton.Click do”.
Connect a “call select list item list
index” to the “to” slot of “set
ListPIcker1.Elements to” .
Connect a “global MultipleChoice” to
the “list” slot of “call select list item
list index” .
Connect a “global
currentQuestionIndex” to the “index
slot of “call select list item list index” .
Changes to AnswerButton.Click
The user’s imput is the selected index from
“ListPicker1” now instead of text from a
text box. We’re expecting a number now.
1.
Connect a “ListPicker1.SelectedIndex”
into the empty left slot of the “=“
block.
Final Program
Review
• Used a 2-D List to store the multiple choices to
each question by index.
• Used ListPicker to get user input.
• ListPicker accepts Lists as elements, to
opoulate the choices.
• The AnswerList became a List of correct
indexes(numbers) rather than the exact
answers in text.
Challenges
a) Provide multiple answers for each question.
b) Create a Birthday Present Hint Quiz for your
parents.
c) Scavenger Hunt Revision.
d) Incorporate other media into quizzes like
sound and/or video.
e) Create entirely sound based quiz game.