Given an ordered list of employees who used their badge to enter or exit the room, write a function that returns two collections:
1. All employees who didn’t use their badge while exiting the room – they recorded an enter without a matching exit. (All employees are required to leave the room before the log ends.)
2. All employees who didn’t use their badge while entering the room – they recorded an exit without a matching enter. (The room is empty when the log begins.)
Each collection should contain no duplicates, regardless of how many times a given employee matches the criteria for belonging to it.
records1 = [
["Martha", "exit"],
["Paul", "enter"],
["Martha", "enter"],
["Steve", "enter"],
["Martha", "exit"],
["Jennifer", "enter"],
["Paul", "enter"],
["Curtis", "exit"],
["Curtis", "enter"],
["Paul", "exit"],
["Martha", "enter"],
["Martha", "exit"],
["Jennifer", "exit"],
["Paul", "enter"],
["Paul", "enter"],
["Martha", "exit"],
["Paul", "enter"],
["Paul", "enter"],
["Paul", "exit"],
["Paul", "exit"]
]
Expected output: ["Paul", "Curtis", "Steve"], ["Martha", "Curtis", "Paul"]
Other test cases:
records2 = [
["Paul", "enter"],
["Paul", "exit"],
]
Expected output: [], []
records3 = [
["Paul", "enter"],
["Paul", "enter"],
["Paul", "exit"],
["Paul", "exit"],
]
Expected output: ["Paul"], ["Paul"]
records4 = [
["Paul", "enter"],
["Paul", "exit"],
["Paul", "exit"],
["Paul", "enter"],
]
Expected output: ["Paul"], ["Paul"]const mismatches = (records) => {
const obj = {};
const notExited = [];
const notEntered = [];
for (const [name, state] of records) {
if (!(name in obj)) {
obj[name] = 0;
}
if (state === 'enter') {
obj[name]++;
} else {
obj[name]--;
}
if (obj[name] > 1) {
if (!notExited.includes(name)) {
notExited.push(name);
}
obj[name] = 0;
}
if (obj[name] < 0) {
if (!notEntered.includes(name)) {
notEntered.push(name);
}
obj[name] = 0;
}
}
for (const [key, val] of Object.entries(obj)) {
if (val === 1) {
if (!notExited.includes(key)) {
notExited.push(key);
}
}
}
return [notExited, notEntered];
};
console.log(mismatches([
["Martha", "exit"],
["Paul", "enter"],
["Martha", "enter"],
["Steve", "enter"],
["Martha", "exit"],
["Jennifer", "enter"],
["Paul", "enter"],
["Curtis", "exit"],
["Curtis", "enter"],
["Paul", "exit"],
["Martha", "enter"],
["Martha", "exit"],
["Jennifer", "exit"],
["Paul", "enter"],
["Paul", "enter"],
["Martha", "exit"],
["Paul", "enter"],
["Paul", "enter"],
["Paul", "exit"],
["Paul", "exit"]
]),
mismatches([
["Paul", "enter"],
["Paul", "exit"]
]),
mismatches([
["Paul", "enter"],
["Paul", "enter"],
["Paul", "exit"],
["Paul", "exit"],
]),
mismatches([
["Paul", "enter"],
["Paul", "exit"],
["Paul", "exit"],
["Paul", "enter"],
]));