Softpanorama (slightly skeptical) Open Source Software Educational Society

May the source be with you, but remember the KISS principle ;-) Softpanorama Search

Introduction to Perl for Unix System Administrators

(Perl without excessive complexity)

by Dr Nikolai Bezroukov

Prev | Up | Contents | Down | Next

3.5. Homework

1. Name what string functions affect the content of  $_ variable?
2. what string functions accept $_ variable as default argument?
3. Execute the following fragment in the debugger and see what splice function will return in this particular case. I bet you will be surprised ;-) to see the result printed.

   splice(@week, $#week);

   splice(@week,-2);

   print "@week \n";
   

4. Write a program that reverses a string using the chop() function. Print both the initial string and the result. 
5. Write a function that uses the substr() and uc() functions to change each second character of the string to upper case (can be useful for generating passwords).
6. Write a program that uses the keys() function to convert all keys of an associative array into the uppercase strings.
7. Write a program that can be used to teach the user what the shift() and unshift() functions do.
8. Write a program that can be used to teach what the push() and pop() functions do.
9. *(see Perl documentation) What does the map() function do?

Prev | Up | Contents | Down | Next