排程演算法 | JavaScript Programming Project

{"id":29741,"student_id":10,"content":"var order1 = createGroup(vendor1);\nvar order2 = createGroup(vendor2);\nvar order3 = createGroup(vendor3);\n\n// First-Come First-Served\nforever(function () {\n    if (order1.length \u003e 0) {\n        order1[0].number -= 1;\n        if (order1[0].number \u003c= 0) {\n            order1.shift();\n        }\n    };\n});\n\n// Shortest Job First\nforever(function () {\n    order2.sort(function (a, b) {\n        return a.number - b.number;\n    });\n    if (order2.length \u003e 0) {\n        order2[0].number -= 1;\n        if (order2[0].number \u003c= 0) {\n            order2.shift();\n        }\n    };\n});\n\n\n// Round Robin\nvar count = 0;\nforever(function () {\n    if (order3.length \u003e 0) {\n        order3[count].number -= 1;\n        if (order3[count].number \u003c= 0) {\n            order3.splice(count, 1);\n        }\n    };\n\n    count++;\n    if (count \u003e= order3.length) {\n        count = 0;\n    }\n});","created_at":"2018-05-24T15:43:28.152+08:00","updated_at":"2020-04-07T15:59:12.310+08:00","name":"排程演算法","language":"javascript","screenshot":{"url":"/uploads/project/screenshot/29741/c449b87e53b64440950a50b3b418fc68.jpg"},"parent_id":28329,"plugin":"var vendor1 = createSprite('vendor_1.png');\nvendor1.scale = 0.2;\nvendor1.x -= 150;\nvendor1.y -= 120;\nvar vendor2 = createSprite('vendor_2.png');\nvendor2.scale = 0.2;\nvendor2.x -= 150;\nvendor2.y += 10;\nvar vendor3 = createSprite('vendor_3.png');\nvendor3.scale = 0.2;\nvendor3.x -= 150;\nvendor3.y += 140;\n\nvar groups = []; // 存放攤販對應的客人群\n\n// 攤販對應的客人群\nfunction createGroup (vendor) {\n    var arr = [];\n    arr.vendor = vendor;\n    arr.count = 0; // 總客人數量\n    arr.time = 0; // 所有的客人累積的等待時間\n    setInterval(()=\u003e { arr.time += arr.length*100 }, 100);\n    forever(()=\u003e {\n        var t = Math.floor(arr.time/arr.count/10)/100\n        print(`平均等待時間 ${t} 秒`, vendor.x - 50, vendor.y + 50, 'black');\n    });\n    groups.push(arr);\n    return arr;\n}\n\n// 產生一個客人\nfunction createUnit (value, group) {\n\n    var unit = createSprite([\"P-01.png\", \"P-02.png\", \"P-03.png\", \"P-04.png\", \"P-05.png\", \"P-06.png\", \"P-07.png\", \"P-08.png\", \"P-09.png\", \"P-10.png\"]);\n    unit.x = 600;\n    unit.y = group.vendor.y + 25;\n    unit.scale = 0.15;\n    unit.costumeId = Math.floor(Math.random() * 10);\n    unit.number = value;\n\n    unit.forever(function () {\n        var idx = group.indexOf(unit);\n        // 如果被移除的客人則將移動目標設為 -100\n        if (idx == -1) {\n            var target = -50;\n        } else {\n            var target = group.vendor.x + 80 + idx*30;\n        }\n        if (target \u003e unit.x) unit.x++;\n        if (target \u003c unit.x) unit.x--;\n        if (unit.x \u003c -50) unit.destroy();\n    });\n\n    group.push(unit);\n}\n\nforever(function () {\n\n    //總人數上限為攤販車的個數乘上 10\n    var total = 0;\n    for (var i=0; i\u003cgroups.length; i++) total += groups[i].length;\n    \n    // 每秒鐘隨機產生一個客人\n    if (Math.random()*60 \u003c 1 \u0026\u0026 total \u003c groups.length*10) {\n        var value = Math.floor(Math.random()*150);\n        groups.forEach((g) =\u003e {\n            createUnit(value, g);\n            g.count++;\n        });\n    }\n    \n    // 印出陣列內所有數值\n    groups.forEach((g, idx) =\u003e {\n        var arr = [];\n        g.forEach((s)=\u003earr.push(s.number));\n        print(`[ ${arr} ]`, 10, 10 + idx*20);\n    });\n});\n","description":null,"note":null,"status":"public","like_student_ids":[],"is_featured":false,"views":545,"hashid":"882snjme","is_content_changed":false,"review_status":"unsubmitted","submitted_at":null,"reviewed_at":null,"advise":null,"is_deleted":false}

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