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{"@context":"https://schema.org","@type":"Code","url":"https://leetcodejavascript.com/solutions/design-task-manager","name":"#3408 - Design Task Manager - LeetCode JavaScript Solutions","description":"There is a task management system that allows users to manage their tasks, each associated with a priority. The system should efficiently ha...","programmingLanguage":"JavaScript","codeRepository":"https://github.com/JoshCrozier/leetcode-javascript","codeSampleType":"JavaScript","text":"/**\n * @param {number[][]} tasks\n */\nvar TaskManager = function(tasks) {\n this.taskRegistry = {};\n this.priorityHeap = new PriorityQueue((a, b) => {\n return a.priority !== b.priority ? b.priority - a.priority : b.taskId - a.taskId;\n });\n\n for (const [userId, taskId, priority] of tasks) {\n this.taskRegistry[taskId] = { userId, priority, version: 1 };\n this.priorityHeap.enqueue({ taskId, priority, version: 1 });\n }\n};\n\n/**\n * @param {number} userId\n * @param {number} taskId\n * @param {number} priority\n * @return {void}\n */\nTaskManager.prototype.add = function(userId, taskId, priority) {\n this.taskRegistry[taskId] = { userId, priority, version: 1 };\n this.priorityHeap.enqueue({ taskId, priority, version: 1 });\n};\n\n/**\n * @param {number} taskId\n * @param {number} newPriority\n * @return {void}\n */\nTaskManager.prototype.edit = function(taskId, newPriority) {\n const currentTask = this.taskRegistry[taskId];\n currentTask.priority = newPriority;\n currentTask.version++;\n this.priorityHeap.enqueue({ taskId, priority: newPriority, version: currentTask.version });\n};\n\n/**\n * @param {number} taskId\n * @return {void}\n */\nTaskManager.prototype.rmv = function(taskId) {\n delete this.taskRegistry[taskId];\n};\n\n\n/**\n * @return {number}\n */\nTaskManager.prototype.execTop = function() {\n while (!this.priorityHeap.isEmpty()) {\n const { taskId, priority, version } = this.priorityHeap.dequeue();\n const activeTask = this.taskRegistry[taskId];\n\n if (activeTask && activeTask.priority === priority && activeTask.version === version) {\n const executedUserId = activeTask.userId;\n delete this.taskRegistry[taskId];\n return executedUserId;\n }\n }\n return -1;\n};","keywords":"LeetCode 3408, #3408 - Design Task Manager, Medium, JavaScript solution","learningResourceType":"Code","isAccessibleForFree":true,"educationalLevel":"intermediate","interactivityType":"mixed"}