nodejs module to checkout number between 1-100 that provide lock and unlock function
You can create a custom module in Node.js that implements a lock and unlock functionality for checking out numbers between 1 and 100.
Here's an example implementation:
const locked = new Set();
function lockNumber(number) {
if (number >= 1 && number <= 100) {
locked.add(number);
return true;
}
return false;
}
function unlockNumber(number) {
if (locked.has(number)) {
locked.delete(number);
return true;
}
return false;
}
module.exports = {
lockNumber,
unlockNumber,
};
You can use this module by requiring it in another script and calling lockNumber or unlockNumber as needed:
const checkout = require('./checkout');
checkout.lockNumber(42);
checkout.unlockNumber(42);
with find nextUnlock function
Sure, here's an updated version of the module that includes a findNextUnlocked function:
const locked = new Set();
function lockNumber(number) {
if (number >= 1 && number <= 100) {
locked.add(number);
return true;
}
return false;
}
function unlockNumber(number) {
if (locked.has(number)) {
locked.delete(number);
return true;
}
return false;
}
function findNextUnlocked(start) {
for (let i = start; i <= 100; i++) {
if (!locked.has(i)) {
return i;
}
}
return -1;
}
module.exports = {
lockNumber,
unlockNumber,
findNextUnlocked,
};
This module exports three functions: lockNumber, unlockNumber, and findNextUnlocked. You can use the findNextUnlocked function to find the next unlocked number starting from a given number, or -1 if there are no unlocked numbers left.
with function lockNextUnlocked
Here's an updated version of the module that includes a lockNextUnlocked function:
const locked = new Set();
function lockNumber(number) {
if (number >= 1 && number <= 100) {
locked.add(number);
return true;
}
return false;
}
function unlockNumber(number) {
if (locked.has(number)) {
locked.delete(number);
return true;
}
return false;
}
function findNextUnlocked(start) {
for (let i = start; i <= 100; i++) {
if (!locked.has(i)) {
return i;
}
}
return -1;
}
function lockNextUnlocked(start) {
const nextUnlocked = findNextUnlocked(start);
if (nextUnlocked === -1) {
return false;
}
lockNumber(nextUnlocked);
return nextUnlocked;
}
module.exports = {
lockNumber,
unlockNumber,
findNextUnlocked,
lockNextUnlocked,
};
This module exports four functions: lockNumber, unlockNumber, findNextUnlocked, and lockNextUnlocked. The lockNextUnlocked function finds the next unlocked number starting from a given number and locks it, or returns false if there are no unlocked numbers left.
now with lockFirst function which has no parameters
Sure, here's an updated version of the module that includes a lockFirst function:
const locked = new Set();
function lockNumber(number) {
if (number >= 1 && number <= 100) {
locked.add(number);
return true;
}
return false;
}
function unlockNumber(number) {
if (locked.has(number)) {
locked.delete(number);
return true;
}
return false;
}
function findNextUnlocked(start) {
for (let i = start; i <= 100; i++) {
if (!locked.has(i)) {
return i;
}
}
return -1;
}
function lockNextUnlocked(start) {
const nextUnlocked = findNextUnlocked(start);
if (nextUnlocked === -1) {
return false;
}
lockNumber(nextUnlocked);
return nextUnlocked;
}
function lockFirst() {
return lockNextUnlocked(1);
}
module.exports = {
lockNumber,
unlockNumber,
findNextUnlocked,
lockNextUnlocked,
lockFirst,
};
This module exports five functions: lockNumber, unlockNumber, findNextUnlocked, lockNextUnlocked, and lockFirst. The lockFirst function locks the first unlocked number between 1 and 100, or returns false if there are no unlocked numbers left.
now i only need lockfirst and unlock, then remove all unused function
Sure, here's the updated version of the module with only the lockFirst and unlockNumber functions:
const locked = new Set();
function lockFirst() {
for (let i = 1; i <= 100; i++) {
if (!locked.has(i)) {
locked.add(i);
return i;
}
}
return false;
}
function unlockNumber(number) {
if (locked.has(number)) {
locked.delete(number);
return true;
}
return false;
}
module.exports = {
lockFirst,
unlockNumber,
};
This module exports two functions: lockFirst and unlockNumber. The lockFirst function locks the first unlocked number between 1 and 100, or returns false if there are no unlocked numbers left. The unlockNumber function unlocks a number if it was previously locked.
modify the locked to be map and give row as any object as lockFirst parameter to be the value
Sure, here's the updated version of the module that uses a Map instead of a Set to store the locked numbers, and allows an object to be passed as the value for each locked number:
const locked = new Map();
function lockFirst(value) {
for (let i = 1; i <= 100; i++) {
if (!locked.has(i)) {
locked.set(i, value);
return i;
}
}
return false;
}
function unlockNumber(number) {
if (locked.has(number)) {
locked.delete(number);
return true;
}
return false;
}
module.exports = {
lockFirst,
unlockNumber,
};
This module exports two functions: lockFirst and unlockNumber. The lockFirst function locks the first unlocked number between 1 and 100, or returns false if there are no unlocked numbers left. The value associated with the locked number can be an object that is passed as a parameter to the lockFirst function. The unlockNumber function unlocks a number if it was previously locked.
