Best of Ruby Quiz (Pragmatic Programmers) by James Edward, II Gray

By James Edward, II Gray

Solve those twenty-five well known programming puzzles, and sharpen your programming talents as you craft solutions.

You'll locate attention-grabbing and not easy programming puzzles including:

  • 800 Numbers
  • Crosswords
  • Cryptograms
  • Knight's Tour
  • Paper, Rock, Scissors
  • Tic-Tac-Toe
  • Texas Hold-Em
  • ...and more.

Learning to application may be very a problem. periods and books can get you thus far, yet sooner or later you should sit and begin fiddling with a few code. simply via analyzing and writing genuine code, with genuine difficulties, are you able to learn.

The Ruby Quiz was once equipped to fill precisely this desire for Ruby programmers. demanding situations, recommendations, and discussions mix to make Ruby Quiz a robust option to research Ruby tips. See how algorithms translate to Ruby code, get publicity to Ruby's libraries, and find out how different programmers use Ruby to unravel difficulties quick and efficiently.

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Sample text

I’ve seen it just about everywhere in some form or another, but I believe Donald E. Knuth may have first made it a popular challenge. The quiz is to lay out crossword puzzles. A puzzle layout will be provided in a file, with the file name passed as a command-line argument. The layout will be formatted as such: X _ _ _ _ X X _ _ X _ _ _ _ _ _ _ _ X _ _ _ X _ _ X X X _ _ _ X _ _ _ X _ _ _ _ _ X X s denote filled-in squares, and underscores are where a puzzle worker would enter letters. Each row of the puzzle is on a new line.

The quiz is to write a Ruby script that does the encryption and decryption of messages using the Solitaire cipher. Encryption Let’s look at the steps of encrypting a message with Solitaire: 1. Discard any non–A to Z characters, and uppercase all remaining letters. Split the message into five character groups, using X s to pad the last group, if needed. ” for example, we would now have: CODEI NRUBY LIVEL ONGER 2. Use Solitaire to generate a keystream letter for each letter in the message. This step is detailed in Section 15, The Keystream, on page 38, but for the sake of example, let’s just say we get this: DWJXH YRFDG TMSHP UURXJ 3.

T EXAS H OLD ’ EM Quiz Answer on page 160 14 Texas Hold’em Posed by Matthew D Moss For this Ruby Quiz, let’s identify and rank poker hands. Say we have the following sample game of the popular Texas hold’em, where you try to make the best five-card hand from a total of seven cards (five shared among all players): Kc 9s Ks Kd 9d 3c 6d 9c Ah Ks Kd 9d 3c 6d Ac Qc Ks Kd 9d 3c 9h 5s 4d 2d Ks Kd 9d 3c 6d 7s Ts Ks Kd 9d Each line represents a player’s final hand. The cards of the hand are separated by a space.

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