1. Exam Prep

2. Exams: Two Exams I just need to know how many seats Google form
12 (section 002 – 11 am)
8 (section 001 – 9:30 am)
I just need to know how many seats
Google form

3. Check pdf processing Download the test pdf
Fill in your name and save it
Close the pdf
Reopen and check that it changed

4. JavaScript Strings

5. What We Want To Do User enters: Mary Smith
We want to respond: Hi Mary!
We know how to concatenate.
How do we take part of a string?

6. Think of Scrabble tiles Each tile is a
Strings
Think of Scrabble tiles
Each tile is a
Letter
Number
Punctuation mark
Space (blank)

7. A literal string must be inside double quotes or single quotes
What is a String?
A literal string must be inside double quotes or single quotes
“this is a string” and this is not a string.
Remember not to cut and paste

8. Concatenating (formally)
It means combining two or more things into one thing
+ Anything can be concatenated
“awe” + “some” = “awesome”
Whitespace only matters inside quotes
“a”+“b” same as “a” = “b”
“a ” + “b” NOT the same as “a” + “b”

9. Substring A substring is also a String
A substring is a part of another string
“cake” is a substring of “birthday cake”
so are “day”, “thd”, and “y cake”
“they” is not, neither is “hello” or “dude”
Will come back to how to extract substrings

10. Referencing characters
Each character has a position Note that it starts at 0, not 1 H I M O 1 2 3 4 5

11. JavaScripts Strings Length: stringname.length
Functions: stringname.function()
Concatenation: + or stringname.concat()
Lots more functions
Use of negative index to come from end
Built-in regular expressions
Excellent summary

12. Useful Functions charAt() Character at the position indexOf()
Position of the first found occurrence
lastIndexOf()
Position of the last found occurrence
replace()
Replaces the matched substring with a new substring
search()
Position of the match
substr()
Substring from start position for number of chars
substring()
Substring from position 1 to position 2
toLowerCase()
Converts a string to lowercase letters
toUpperCase()
Converts a string to uppercase letters
trim()
Removes whitespace from both ends of a string

13. Lab Create a form that takes a full name and a birth year
Pass both as parameters
Procedure needs to
Extract first name
Compute age
Print a message
Happy nn Birthday, FirstName