Front-End Analogies: Closure's Coffee — Recursion

 "use strict"; const timeLimit = 45; const cleaningTasks = [15, 10, 8, 5, 3, 25, 7]; const tasksCompleted = []; // Jack's thinking: "I've only got 45 minutes?!" // "I'll just go down the list, one by one." const jackCleaning = (_tasks) => { return (_timeLimit) => { return (_tasksCompleted) => { console.log('_tasks', _tasks); let taskTimeChecker = _tasks.find(task => task <= _timeLimit); // "Find the first one, get it done." console.log('taskTimeChecker', taskTimeChecker); if (taskTimeChecker != undefined) { _timeLimit -= taskTimeChecker; console.log('_timeLimit', _timeLimit); // "Runnin' out of time." _tasksCompleted.push(taskTimeChecker); console.log('_tasksCompleted', _tasksCompleted); // "Another one bites the dust." _tasks.splice(_tasks.indexOf(taskTimeChecker), 1); // "Check that one off the list." } else { console.log(_tasksCompleted); return `_tasksCompleted: ${_tasksCompleted}`; } return jackCleaning(_tasks)(_timeLimit)(_tasksCompleted); // "All play and no work makes Jack a dull boy." // And he just keeps going down the list like a madman. } } } console.log( jackCleaning(cleaningTasks)(timeLimit)(tasksCompleted) ); // "_tasks" [15, 10, 8, 5, 3, 25, 7] // "taskTimeChecker" 15 // "_timeLimit" 30 // "_tasksCompleted" [15] // He's done one 15-minute task, and has 30 minutes left… // "_tasks" [10, 8, 5, 3, 25, 7] // "taskTimeChecker" 10 // "_timeLimit" 20 // "_tasksCompleted" [15, 10] // "_tasks" [8, 5, 3, 25, 7] // "taskTimeChecker" 8 // "_timeLimit" 12 // "_tasksCompleted" [15, 10, 8] // "_tasks" [5, 3, 25, 7] // "taskTimeChecker" 5 // "_timeLimit" 7 // "_tasksCompleted" [15, 10, 8, 5] // "_tasks" [3, 25, 7] // "taskTimeChecker" 3 // "_timeLimit" 4 // "_tasksCompleted" [15, 10, 8, 5, 3] // "_tasks" [25, 7] // "taskTimeChecker" undefined // [15, 10, 8, 5, 3] // "_tasksCompleted: 15,10,8,5,3" // With only 4 minutes left, neither one of those tasks is short enough. // Mr. Scrubbing Bubbles has to go back to slingin' beans.