Created
February 8, 2013 14:53
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harris' rock paper scissors
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| <!doctype html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="utf-8" /> | |
| <title>Rock, Paper, Scissors</title> | |
| <script> | |
| var options = [ 'rock', 'paper', 'scissors' ], | |
| userChoice = null, | |
| computerChoice = null, | |
| result = null, | |
| wins = { | |
| 'user': 0, | |
| 'computer': 0 | |
| }; | |
| function getResult() { | |
| if (userChoice === computerChoice) { | |
| return 'tie'; | |
| } | |
| if (userChoice === 'paper' && computerChoice === 'rock') { | |
| return 'user'; | |
| } | |
| if (userChoice === 'scissors' && computerChoice === 'paper') { | |
| return 'user'; | |
| } | |
| if (userChoice === 'rock' && computerChoice === 'scissors') { | |
| return 'user'; | |
| } | |
| return 'computer'; | |
| } | |
| function getUserChoice(message) { | |
| message = message || 'rock, paper, or scissors?'; | |
| return prompt(message); | |
| } | |
| function play() { | |
| var results = document.getElementById('results'), | |
| score = document.getElementById('score'), | |
| scoreHTML = '', | |
| attempts = 0; | |
| userChoice = getUserChoice(); | |
| while(options.indexOf(userChoice) === -1 && attempts < 5) { | |
| userChoice = getUserChoice('please pick a valid option: rock, paper or scissors?'); | |
| attempts += 1; | |
| } | |
| computerChoice = options[Math.floor(Math.random() * options.length)]; | |
| result = getResult(); | |
| if (result === 'tie') { | |
| results.innerHTML += '<p>you tied!</p>'; | |
| } else { | |
| wins[result] += 1; | |
| results.innerHTML += '<p>' + result + ' won!</p>'; | |
| } | |
| scoreHTML += '<p>'; | |
| scoreHTML += 'user wins: ' + wins.user; | |
| scoreHTML += '</p>'; | |
| scoreHTML += '<p>'; | |
| scoreHTML += 'computer wins: ' + wins.computer; | |
| scoreHTML += '</p>'; | |
| score.innerHTML = scoreHTML; | |
| } | |
| </script> | |
| </head> | |
| <body> | |
| <div id="results"></div> | |
| <div id="score"></div> | |
| <button onclick="play()">play</button> | |
| </body> | |
| </html> |
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