Create and array, then loop to find i then alert username

Question

Create an array and fill it with at least six usernames (i.e. “Sophia”, “Gabriel”, …) then loop through them with a for loop. If a username contains the letter “i” then alert the username.

I have tried to make an array and create and "if" statement, then I want to make an alert. I know I am missing something, but I can't figure out what.

  let userNames = ['rachel', 'greg', 'mike', 'adam', 'susan', 'john'];

  if(userNames.includes('i')){

    window.alert(userNames);
  }

I would like there to be a window alert with the name "mike"

SakoBu · Accepted Answer · 2019-01-19 21:32:31Z

1

That's not how includes works... for example:

const userNames = ['rachel', 'greg', 'mike', 'adam', 'susan', 'john'];

console.log(userNames.includes('mike')) // true
console.log(userNames.includes('i')) // false

To get what you want you can do something like this:

 const userNames = ['rachel', 'greg', 'mike', 'adam', 'susan', 'john'];
    
    userNames.forEach(name => {
      if(name.includes('i')) {
        console.log(name)
      }
    })

answered Jan 19, 2019 at 21:32

SakoBu

4,0311 gold badge18 silver badges35 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

stever · Accepted Answer · 2019-01-19 21:33:30Z

1

Use a for loop if you want to return the index value of the array. In this case we treat the letter i as a regular expression by placing it between two forward slashes, and try to match that string in each array value. It then alerts you with the entire value (mike(

    let userNames = ['rachel', 'greg', 'mike', 'adam', 'susan', 'john'];
      for(let i = 0; i < userNames.length; i++) {
        if(userNames[i].match(/i/)) {
          window.alert(userNames[i]);
      }
    }

edited Jan 19, 2019 at 21:33

answered Jan 19, 2019 at 21:25

stever

1,2513 gold badges14 silver badges22 bronze badges

Comments

Jack Bashford · Accepted Answer · 2019-01-19 21:42:22Z

1

Iterate over the array with forEach then match it against a regular expression:

const userNames = ['rachel', 'greg', 'mike', 'adam', 'susan', 'john'];
const regex = /i/;
userNames.forEach(name => {
  if (name.match(regex)) {
    alert(name);
  }
})

Or you could use includes:

const userNames = ['rachel', 'greg', 'mike', 'adam', 'susan', 'john'];
userNames.forEach(name => {
  if (name.includes("i")) {
    alert(name);
  }
})

edited Jan 19, 2019 at 21:42

answered Jan 19, 2019 at 21:37

Jack Bashford

44.3k11 gold badges56 silver badges84 bronze badges

Collectives™ on Stack Overflow

Create and array, then loop to find i then alert username

3 Answers 3

Comments

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related