CODEWITHSUNDEEP
javascriptarrays
Marvin Würtz
Marvin Würtz

Reputation: 11

How to find a word(string) in Javascript array?

I need to check if my array has the word

This is my code please help 

    var name = ['heine', 'hans'];
    var password = ['12343', '1234'];
    function login() {
    var pos;
        if(name.includes('hans')) {
            console.log("enthält");
            pos = name.indexOf('hans');
            console.log(pos)
            if(password[pos] === '1234') {
                console.log("angemeldet")
            }
        }
      }

consoleout = 6, but why, it must be a 1

If the word hans is in the array, than i need the position from the word in the array

Upvotes: 1

Views: 105

Answers (4)

SkillGG
SkillGG

Reputation: 686

You may use this. I am not sure if it is what you want.

let names = ["heine", "hans"];
let password = ["12343", "1234"];
let i, temp;

function log(login, pass) {
    if((i = names.indexOf(login)) !== -1){
        if(password[i] === pass)
            console.log("Logged!");
    }
}

log("hans", "1234")

Upvotes: 0

Shidersz
Shidersz

Reputation: 17190

In your case, you can also try something like this with findIndex:

const usernames = ['heine', 'hans'];
const passwords = ['12343', '1234'];

function login(user, pass)
{
    let userIdx = usernames.findIndex(x => x === user);

    // On a real application do not give any tip about which is
    // wrong, just return "invalid username or password" on both cases.
    
    if (userIdx < 0)
        return "Invalid username!";

    if (pass !== passwords[userIdx])
        return "Invalid password!";

    return "Login OK!"
}

console.log(login("heine", "12343"));
console.log(login("hans", "lala"));

Upvotes: 0

epascarello
epascarello

Reputation: 207501

Problem here is name is window.name which is a string..

var name = ['heine', 'hans'];
console.log(window.name, typeof window.name)

var xname = ['heine', 'hans'];
console.log(window.xname, typeof window.xname)

Change your variable to another word that is not reserved if you are in global scope.

Upvotes: 0

Mark
Mark

Reputation: 92440

You might find some() handy for this. It will pass the index into the callback which you can use to find the corresponding value from the passwords array:

function test(name, pw) {
  let names = ["heine", "hans"];
  let passwords = ["12343", "1234"];
  // is there `some` name/pw combinations that matches?
  return names.some((n, index) => name == n && pw == passwords[index])
}

console.log(test("hans", '1234'))   // true
console.log(test("hans", '12345'))  // false
console.log(test("hans", '12343'))  // false

console.log(test("heine", '12343')) // true
console.log(test("mark", '12343'))  // false

Upvotes: 2

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