{"id":3075,"date":"2021-09-14T14:22:09","date_gmt":"2021-09-14T14:22:09","guid":{"rendered":"https:\/\/rengga.dev\/blog\/?p=3075"},"modified":"2023-02-28T00:36:59","modified_gmt":"2023-02-28T00:36:59","slug":"js-tutorial-math-random-rock-paper-scissors","status":"publish","type":"post","link":"https:\/\/rengga.dev\/blog\/js-tutorial-math-random-rock-paper-scissors\/","title":{"rendered":"JS Tutorial &#8211; Math.random() Rock Paper Scissors"},"content":{"rendered":"<p><span style=\"color: #ef3207;\"><a style=\"color: #ef3207;\" href=\"https:\/\/rengga.dev\/\" target=\"_blank\" rel=\"noopener\"><strong>Rengga Dev<\/strong><\/a> <\/span>&#8211; <code>Math.random()<\/code> is an API in JavaScript. It is a function that gives you a random number. The number returned will be between 0 (inclusive, as in, it\u2019s possible for an actual 0 to be returned) and 1 (exclusive, as in, it\u2019s not possible for an actual 1 to be returned).<\/p>\n<p><iframe style=\"width: 100%;\" title=\"Math.random() Rock \/ Paper \/ Scissors\" src=\"https:\/\/codepen.io\/renggagumilar\/embed\/OJvBzRe?default-tab=result&amp;theme-id=dark\" height=\"600\" frameborder=\"no\" scrolling=\"no\" allowfullscreen=\"allowfullscreen\"><br \/>\nSee the Pen <a href=\"https:\/\/codepen.io\/renggagumilar\/pen\/OJvBzRe\"><br \/>\nMath.random() Rock \/ Paper \/ Scissors<\/a> by Rengga Gumilar (<a href=\"https:\/\/codepen.io\/renggagumilar\">@renggagumilar<\/a>)<br \/>\non <a href=\"https:\/\/codepen.io\">CodePen<\/a>.<br \/>\n<\/iframe><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"js\">$(window).load(function() {\r\n  \r\n  var movesContainer = $('#moves'),\r\n      playerCount = $('.Player-count'),\r\n      computerCount = $('.Computer-count');\r\n  \r\n  $('#moves li').on(\"click\", function() {\r\n    var yourMove = $(this).data('move');\r\n    processMoves(yourMove);\r\n    \r\n    var icon = $(this).find('.fa');\r\n    icon.addClass('animating');\r\n    \r\n    var s = setTimeout(function(icon) {\r\n      $('#moves li .fa').removeClass('animating');\r\n      clearTimeout();\r\n    }, 5000);\r\n  });\r\n  \r\n});\r\n\r\nfunction processMoves(yourMove) {\r\n  var opponentMove = generateRandomOpponentMove();\r\n  calculateWinner(yourMove,opponentMove);\r\n}\r\n\r\nfunction generateRandomOpponentMove() {\r\n  var availableMoves = ['rock','paper','scissors'],\r\n      randomNumber = Math.floor(Math.random() * availableMoves.length),\r\n      opponentMove = availableMoves[randomNumber];\r\n  \r\n  return opponentMove;\r\n}\r\n\r\nfunction calculateWinner(yourMove, opponentMove) {\r\n  switch(yourMove) {\r\n    case 'rock':\r\n      if(opponentMove === 'rock') {\r\n        return 'draw';\r\n      } else if (opponentMove === 'scissors') {\r\n        youWin();\r\n      } else {\r\n        youLose();\r\n      }\r\n      break;\r\n    case 'paper':\r\n      if(opponentMove === 'paper') {\r\n        return 'draw';\r\n      } else if (opponentMove === 'rock') {\r\n        youWin();\r\n      } else {\r\n        youLose();\r\n      }\r\n      break;\r\n    case 'scissors':\r\n      if(opponentMove === 'scissors') {\r\n        return 'draw';\r\n      } else if (opponentMove === 'paper') {\r\n        youWin();\r\n      } else {\r\n        youLose();\r\n      }\r\n      break;\r\n  }\r\n}\r\n\r\nfunction youWin() {\r\n  var playerScore = $('.Player-count');\r\n  var playerScoreUpdated = parseInt(playerScore.text()) + 1;\r\n  playerScore.text(playerScoreUpdated);\r\n}\r\n\r\nfunction youLose() {\r\n  var computerScore = $('.Computer-count');\r\n  var computerScoreUpdated = parseInt(computerScore.text()) + 1;\r\n  computerScore.text(computerScoreUpdated);\r\n}<\/pre>\n<p>In this childhood classic game of Rock Paper Scissors, Math.random is used to generate a randomized move for the computer playing as the opponent. It makes a pick from the three available moves.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Rengga Dev &#8211; Math.random() is an API in JavaScript. It is a <a class=\"read-more\" href=\"https:\/\/rengga.dev\/blog\/js-tutorial-math-random-rock-paper-scissors\/\" title=\"JS Tutorial &#8211; Math.random() Rock Paper Scissors\" itemprop=\"url\"><\/a><\/p>\n","protected":false},"author":1,"featured_media":3798,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[264,263,274,283,103,227],"newstopic":[],"class_list":{"0":"post-3075","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-javascript","8":"tag-javascript-tutorial","9":"tag-js-tutorial","10":"tag-math-random","11":"tag-rock-paper-scissors","12":"tag-web-design","13":"tag-web-designer"},"_links":{"self":[{"href":"https:\/\/rengga.dev\/blog\/wp-json\/wp\/v2\/posts\/3075","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rengga.dev\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rengga.dev\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rengga.dev\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/rengga.dev\/blog\/wp-json\/wp\/v2\/comments?post=3075"}],"version-history":[{"count":2,"href":"https:\/\/rengga.dev\/blog\/wp-json\/wp\/v2\/posts\/3075\/revisions"}],"predecessor-version":[{"id":3078,"href":"https:\/\/rengga.dev\/blog\/wp-json\/wp\/v2\/posts\/3075\/revisions\/3078"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rengga.dev\/blog\/wp-json\/wp\/v2\/media\/3798"}],"wp:attachment":[{"href":"https:\/\/rengga.dev\/blog\/wp-json\/wp\/v2\/media?parent=3075"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rengga.dev\/blog\/wp-json\/wp\/v2\/categories?post=3075"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rengga.dev\/blog\/wp-json\/wp\/v2\/tags?post=3075"},{"taxonomy":"newstopic","embeddable":true,"href":"https:\/\/rengga.dev\/blog\/wp-json\/wp\/v2\/newstopic?post=3075"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}