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javascriptjqueryarrays
Goran
Goran

Reputation: 748

Rotate positions of elements in array every second in JS

I'm trying to create a loop in JS that is every second changing / rotating positions of N elements in array in a way that first becomes second, second becomes third, and so on, last becomes first and when is over repeat it again

first step

array = ['1','2','3'];

second step

array = ['2','3','1'];

third step

array = ['3','1','2'];

repeat

it seems quite easy but I'm stuck

thanks

Upvotes: 2

Views: 814

Answers (2)

Weedoze
Weedoze

Reputation: 13953

Array.shift() will remove the first element. Array.push() will add the element at the end

setInterval will execute the function every 1000 ms

let array = [1,2,3];

setInterval(()=>{
  array.push(array.shift());     
  console.log(JSON.stringify(array));
}, 1000);

Upvotes: 7

Behnam
Behnam

Reputation: 6459

very simple

//ES5
var array = ['1','2','3'];

function rotate(){
  setInterval(function(){
    console.log(array);
    array.push(array.shift())        
  },1000)  
}

rotate();

Upvotes: 3

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