15. File Assignments

1. Count the number of lines in a file.

2. Count the number of words in a file.

3. Count the number of characters in a file.

4. Find the sum of all of the integers in a file.

5. Print out the file with line numbers in front of each line.

6. Where’s Waldo? Create a file called “waldo.txt” that consists of 10000 lines of text. Each line should have 10 random integers from 0 to 9999. Except that there is a 0.1% chance that a given line will instead have all of the same integer.

7. Find Waldo Read a file called “waldo.txt” and print out every integer that occurs 10 times on a line, just like you would make in the previous problem.

8. Implement the “tree” command.

    .
    └── Risk
       ├── build.bat
       ├── build.sh
       ├── changelog.txt
       ├── compress.rkt
       ├── contributors.txt
       ├── notes.txt
       ├── PlannedAdditions.txt
       ├── README.md
       └── src
           ├── dice-functs.rkt
           ├── ellipse.rkt
           ├── fonts
           │   └── Roboto-Light.ttf
           ├── graph.rkt
           ├── hit-box-determiner.rkt
           ├── imgs
           │   ├── 6ca.jpg
           │   ├── board.png
           │   ├── cardico.png
           │   ├── close.png
      etc you get the idea
   

More Practice

Additional exercises