Squeaky Clean
10 Points
strings
Instructions
In this exercise you will implement a partial set of utility functions to help a developer clean up identifier names.
In the 5 tasks you will gradually build up the clean function.
A valid identifier comprises zero or more letters and underscores.
If an empty string is passed to the clean function, an empty string should be returned.
1. Replace spaces with underscores
Implement a clean1 function to replace any spaces with underscores. This also applies to leading and trailing spaces.
clean1 "my Id"
--> "my___Id"2. Replace control characters with the upper case string "[CTRL]"
Implement clean2 to do everything the previous function does and replace common control characters (\n, \t, and \r ) with the string "[CTRL]".
clean2 "my\nId"
--> "my[CTRL]Id",3. Convert kebab-case to camelCase
Implement clean3 to do everything the previous function does and convert kebab-case to camelCase.
clean3 "à-ḃç"
--> "àḂç"4. Omit digits
Implement 'clean4` to do everything the previous function does and omit all digits.
clean4 "123"
--> ""5. Omit Greek lower case letters
Finally, implement clean to do everything the previous function does and omit any Greek letters in the range 'α' to 'ω'.
clean "My Οβιεγτ Finder"
--> "My_Ο_Finder"Squeaky Clean
10 Points
strings
Instructions
In this exercise you will implement a partial set of utility functions to help a developer clean up identifier names.
In the 5 tasks you will gradually build up the clean function.
A valid identifier comprises zero or more letters and underscores.
If an empty string is passed to the clean function, an empty string should be returned.
1. Replace spaces with underscores
Implement a clean1 function to replace any spaces with underscores. This also applies to leading and trailing spaces.
clean1 "my Id"
--> "my___Id"2. Replace control characters with the upper case string "[CTRL]"
Implement clean2 to do everything the previous function does and replace common control characters (\n, \t, and \r ) with the string "[CTRL]".
clean2 "my\nId"
--> "my[CTRL]Id",3. Convert kebab-case to camelCase
Implement clean3 to do everything the previous function does and convert kebab-case to camelCase.
clean3 "à-ḃç"
--> "àḂç"4. Omit digits
Implement 'clean4` to do everything the previous function does and omit all digits.
clean4 "123"
--> ""5. Omit Greek lower case letters
Finally, implement clean to do everything the previous function does and omit any Greek letters in the range 'α' to 'ω'.
clean "My Οβιεγτ Finder"
--> "My_Ο_Finder"