How do I get the last item in an array?

FAQ JavaScript FAQ
1

Hi!

const bobsFollowers = ['Jane', 'Izumi', 'Sasha', 'Natsu'];
const tinasFollowers = ['Haru', 'Izumi', 'Natsu'];

const mutualFollowers = [];

for(var i=0; i<bobsFollowers.length; i++){
  for(var j=0; j<tinasFollowers.length; j++){
    if(bobsFollowers[i] === tinasFollowers[j]){
      mutualFollowers.push(bobsFollowers[i]);
      console.log('i and j are ' + bobsFollowers[i]);
      console.log('The mutual Followers are ' + mutualFollowers);
      console.log('The last mutual Follower is ' + mutualFollowers[mutualFollowers.length-1]);
      
    }
    else{
      console.log('i is '+ bobsFollowers[i]+ ' and j is '+ tinasFollowers[j]);
    }
  }
  
}

Is there a way to get the value of an array index without using this trick?

console.log('The last mutual Follower is ' + mutualFollowers[mutualFollowers.length-1]);

Thank you!

2

That looks to be the best way to get the last item and the most dynamic. Its even in the documentation

3

The Array.slice() method is ideal for this purpose…

arr = [1,5,9,2,6,4,8,7]
console.log(arr.slice(-1))    // 7
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