In my scenario, I have a list of days where employees are scheduled to work. However, on the website, I need to display the remaining days as leave. In cases where an employee has two different shifts, there can be two elements in the object.
var WorkDays = [{day:3}, {day:3}, {day:1}, {day:1}, {day:0}];
var days = [0, 1, 2, 3, 4, 5, 6}];
The newly updated WorkDays array should look like this:
WorkDays = [{day:0}, {day:1}, {day:1},{day:2}, {day:3}, { day:3} ,{ day:4}, {day:5}, {day:6}];
In case you were wondering: [{day:0}, {day:1},...]
The most effective method is to utilize the reduce function.
var WorkDays = [{day:3}, {day:3}, {day:1}, {day:1}, {day:0}],
days = [0, 1, 2, 3, 4, 5, 6],
result = days.reduce((days, c) => {
if (!days.some(({day}) => day === c)) days.push({day: c});
return days;
}, WorkDays).sort((a, b) => a.day - b.day);
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