循环不会搜索整个对象数组吗？

Question

For javascript, I have an array of objects and I want to see if a user's entry matches 2 of the properties of any of the three objects in my array. For some reason my 'for loop' only works for the first object but never checks the other two. How can I fix this?

 class Customer { constructor(fN, lN, bal, cID, pass) { this.firstName = fN; this.lastName = lN; this.balance = bal; this.customerID = cID; this.password = pass; } } const bankers = []; bankers.push(new Customer("Jack", "Scott", 3689.21, "4552", "2811")); bankers.push(new Customer("John", "Smith", 2500.00, "4553", "1234")); bankers.push(new Customer("Albert", "Price", 100000.00, "4554", "6189")); let userID = prompt(`Please enter your customer ID.`); let userPass = prompt(`Please enter your password.`); for (let i = 0; i < bankers.length; i++) { if (bankers[i].customerID === userID && bankers[i].password === userPass) { console.log('Yay'); break; } else { console.log('boo'); break; } } 

My 'for loop' only works when I test for the first customer. If I try to enter a customerid or password for the other two it fails. Why is this happening? I thought the i variable should go through all 3 objects

Answer 1

Two things - one, you were missing a quote in front of Jack . Two, you need to redefine your variables each time your loop runs - move your userID and userPass declarations inside your loop:

 class Customer { constructor(fN, lN, bal, cID, pass) { this.firstName = fN; this.lastName = lN; this.balance = bal; this.customerID = cID; this.password = pass; } } const bankers = []; bankers.push(new Customer("Jack", "Scott", 3689.21, "4552", "2811")); bankers.push(new Customer("John", "Smith", 2500.00, "4553", "1234")); bankers.push(new Customer("Albert", "Price", 100000.00, "4554", "6189")); for (let i = 0; i < bankers.length; i++) { let userID = prompt(`Please enter your customer ID.`); let userPass = prompt(`Please enter your password.`); if (bankers[i].customerID === userID && bankers[i].password === userPass) { console.log('Yay'); } else { console.log('boo'); } } 

EDIT

Based on the comments, I believe you want to use some like so instead:

 class Customer { constructor(fN, lN, bal, cID, pass) { this.firstName = fN; this.lastName = lN; this.balance = bal; this.customerID = cID; this.password = pass; } } const bankers = []; bankers.push(new Customer("Jack", "Scott", 3689.21, "4552", "2811")); bankers.push(new Customer("John", "Smith", 2500.00, "4553", "1234")); bankers.push(new Customer("Albert", "Price", 100000.00, "4554", "6189")); let userID = prompt(`Please enter your customer ID.`); let userPass = prompt(`Please enter your password.`); if (bankers.some(banker => banker.customerID == userID && banker.password == userPass)) { console.log('Yay'); } else { console.log('boo'); }