背包 stack 先進後出：把紅色、藍色、綠色寶石放到指定的寶箱 | JavaScript Programming Project

{"id":56877,"student_id":10,"content":"ibot.x = 4;\nibot.y = 1;\nibot.direction = 270;\n\n/**\n * R: 「順」時針旋轉\n * L: 「逆」時針旋轉\n * M: 向前「走」一格\n * B: 向後「退」一格\n * J: 跳到第 i 個指令繼續執行 ex: J5\n * ?J:「如果」艾伯特所在的格子有 x 物品「就」跳到第 y 個指令繼續執行 ex: red?J10\n * +: 從背包取出 1 個物品放到當前格子\n * -: 從當前格子取出 1 個物品放到背包\n */\nrunScript([\n    'M', 'M', '-', 'M', '-', 'M', '-',\n    \n    'B', 'B', 'B', 'B', 'B', 'B', 'B', 'B',\n    \n    '+', 'M', '+', 'M', '+', 'M', 'M'\n]);","created_at":"2019-02-14T13:33:00.569+08:00","updated_at":"2019-11-12T06:38:45.131+08:00","name":"背包 stack 先進後出：把紅色、藍色、綠色寶石放到指定的寶箱","language":"javascript","screenshot":{"url":"/uploads/project/screenshot/56877/cae621a452afd5b7f280f46d89261646.jpg"},"parent_id":56876,"plugin":"setBackdrop(\"black\");\n\nvar grid = [];\n\nvar ibot = {\n    x: 0,\n    y: 0,\n    direction: 0,\n    stepForward: function () {\n        this.direction = this.direction%360;\n        if (this.direction \u003c 0) this.direction+=360;\n        if (this.direction === 0) this.y--;\n        if (this.direction === 90) this.x++;\n        if (this.direction === 180) this.y++;\n        if (this.direction === 270) this.x--;\n    },\n    stepBack: function () {\n        this.direction = this.direction%360;\n        if (this.direction \u003c 0) this.direction+=360;\n        if (this.direction === 0) this.y++;\n        if (this.direction === 90) this.x--;\n        if (this.direction === 180) this.y--;\n        if (this.direction === 270) this.x++;\n    }\n}\n\nvar backpack = [];\n\nfunction loadData (map) {\n    for (var x = 0; x \u003c map.length; x++) {\n        grid[x] = [];\n        for (var y = 0; y \u003c map[x].length; y++) {\n            let color = map[x][y].split('_')[0] || 'black';\n            let count = map[x][y].split('_')[1] || 0;\n            count = Number(count);\n            \n            grid[x][y] = { color, count }\n        }\n    }\n}\n\nfunction runScript (script) {\n    \n    let idx = 0;\n    \n    let id = setInterval(function () {\n        let cmd = script[idx];\n        console.log(cmd);\n        if (cmd === undefined) {\n            console.log('done!')\n            return clearInterval(id);\n        }\n\n        if (cmd === 'R') ibot.direction+=90;\n        if (cmd === 'L') ibot.direction-=90;\n        if (cmd === 'M') ibot.stepForward();\n        if (cmd === 'B') ibot.stepBack();\n        if (cmd === '-') {\n            if (grid[ibot.x][ibot.y].count \u003e 0) {\n                grid[ibot.x][ibot.y].count--;\n                backpack.push(grid[ibot.x][ibot.y].color);\n                if (grid[ibot.x][ibot.y].count === 0) {\n                    grid[ibot.x][ibot.y].color = 'black';\n                }\n            }\n        }\n        if (cmd === '+') {\n            let d = backpack.pop();\n            if (d) {\n                if (grid[ibot.x][ibot.y].color == 'black') {\n                    grid[ibot.x][ibot.y].color = d;\n                    grid[ibot.x][ibot.y].count = 1;\n                } else {\n                    grid[ibot.x][ibot.y].count++;\n                }\n            }\n        }\n        if (cmd[0] === 'J') {\n            let target = Number(cmd.slice(1));\n            idx = target - 1;\n        }\n        if (cmd.indexOf('?J') !== -1) {\n            let color = cmd.split('?J')[0];\n            let target = cmd.split('?J')[1];\n            if (grid[ibot.x][ibot.y].color === color) {\n                idx = target - 1;\n            }\n        }\n        \n        idx++;\n\n    }, 250);\n\n}\n\n\nforever(function(){\n    \n    let offsetX = 50;\n    let offsetY = 50;\n\n    for (var x=0; x\u003cgrid.length; x++) {\n        for (var y=0; y\u003cgrid[x].length; y++) {\n            pen.size = '3';\n            pen.color = '#fff';\n            pen.fillColor = grid[x][y].color;\n            pen.drawRect(x*50 + offsetX, y*50 + offsetY, 50, 50);\n            \n            if (grid[x][y].count \u003e 0)\n                print(grid[x][y].count, x*50 + 7 + offsetX, y*50 + 7 + offsetY, '#fff');\n        }    \n    }\n    \n    // draw ibot\n    pen.size = 5;\n    pen.fillColor = 'rgba(0, 0, 0, 0)';\n    pen.color = 'gold';\n    pen.drawRect(ibot.x*50+3 + offsetX, ibot.y*50+2 + offsetY, 44, 44);\n    \n    let head = [ibot.x*50 + 25 + offsetX, ibot.y*50 + 25 + offsetY];\n    if (ibot.direction === 0) head[1] -= 20;\n    if (ibot.direction === 90) head[0] += 20;\n    if (ibot.direction === 180) head[1] += 20;\n    if (ibot.direction === 270) head[0] -= 20;\n    pen.fillColor = 'gold';\n    pen.drawCircle(head[0], head[1], 4);\n    \n    // backpack\n    print(`背包(${backpack.length}) [${backpack}]`, 5, 5, '#fff');\n    \n})\n\n//----------------- 題目設定 -----------------//\nlet map = [\n    ['', 'green_1', ''],\n    ['', 'blue_1', ''],\n    ['', 'red_1', ''],\n    ['', '', ''],\n    ['', '', ''],\n    ['', '', ''],\n    ['', 'red_1', ''],\n    ['', 'blue_1', ''],\n    ['', 'green_1', ''],\n];\nloadData(map);","description":null,"note":null,"status":"public","like_student_ids":[],"is_featured":false,"views":536,"hashid":"5j3sr3g6","is_content_changed":false,"review_status":"unsubmitted","submitted_at":null,"reviewed_at":null,"advise":null,"is_deleted":false}