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Exercises for Programmers

Solutions for Exercises for Programmers, by Brian Hogan

Plan

I'm going to implement the solution to each exercise in a handful of languages. Largely I hope to cover the exercises with Ruby and Go, and later Haskell, Python, Elm, Rust, or C.

Each exercise has a few "challenges" appended, elaborating on the original problem. I'm going to ignore this on the first run through, then revisit them subsequently.

Organization

Each exercise will have its own self-contained sub-directory within this repository including a README to document the problem and related details.

Within each exercise directory will be sub-directories enclosing solutions, one per language.

Running the Solutions

How to execute the implemented solutions will depend on each language, among other things.

Ruby

All solutions were written with Ruby 2.2.3 (MRI/CRuby). With a compatible Ruby installed they should all be executable in the usual fashion, by passing the file name to the interpreter.

$ ruby solution.rb

Additionally, all of the Ruby solutions have a "shebang" (#!) specified, so you may be able to execute them directly, depending.

$ ./solution.rb

Go

All solutions in Go are written against 1.5.2. They can be built or run as-is in the given directory, if you have the Go platform installed.

$ go build main.go
$ ./main

$ go run main.go

The Exercises

  1. Saying Hello
  2. Counting the Number of Characters
  3. Printing Quotes
  4. Mad Lib
  5. Simple Math
  6. Retirement Calculator
  7. Area of a Rectangular Room
  8. Pizza Party
  9. Paint Calculator
  10. Self-Checkout
  11. Currency Conversion
  12. Computing Simple Interest
  13. Determining Compound Interest
  14. Tax Calculator
  15. Password Validation
  16. Legal Driving Age
  17. Blood Alcohol Calculator
  18. Temperature Converter
  19. BMI Calculator
  20. Multistate Sales Tax Calculator
  21. Numbers to Names
  22. Comparing Numbers
  23. Troubleshooting Car Issues
  24. Anagram Checker
  25. Password Strength Indicator
  26. Months to Pay Off a Credit Card
  27. Validating Inputs
  28. Adding Numbers
  29. Handling Bad Input
  30. Multiplication Table
  31. Karvonen Heart Rate
  32. Guess the Number Game
  33. Magic 8 Ball
  34. Employee List Removal
  35. Picking a Winner
  36. Computing Statistics
  37. Password Generator
  38. Filtering Values
  39. Sorting Records
  40. Filtering Records
  41. Name Sorter
  42. Parsing a Data File
  43. Website Generator
  44. Product Search
  45. Word Finder
  46. Word Frequency Finder
  47. Who’s in Space?
  48. Grabbing the Weather
  49. Flickr Photo Search
  50. Movie Recommendations
  51. Pushing Notes to Firebase
  52. Creating Your Own Time Service
  53. Todo List
  54. URL Shortener
  55. Text Sharing
  56. Tracking Inventory
  57. Trivia App