javascript rotate array elements [duplicate]

Question

Hello, everybody, I have this task: I have an array [4,7,3,6,9] and I have to make an array like this:

[4,7,3,6,9]
[9,4,7,3,6]
[6,9,4,7,3]
[3,6,9,4,7]
[7,3,6,9,4]

I have to make a program where array is rotating even if I add a new item to an array it should change accordingly. I am total newbie at JS, 1 week or so, here is my current try:

var numbers = [4, 7, 3, 6, 9];
console.log(numbers);
numbers[0] = 9; numbers[1] = 4; numbers[2] = 7; numbers[3] = 3; numbers[4] = 6;
console.log(numbers);
numbers[0] = 6; numbers[1] = 9; numbers[2] = 4; numbers[3] = 7; numbers[4] = 3;
console.log(numbers);
numbers[0] = 3; numbers[1] = 6; numbers[2] = 9; numbers[3] = 4; numbers[4] = 7;
console.log(numbers);
numbers[0] = 7; numbers[1] = 3; numbers[2] = 6; numbers[3] = 9; numbers[4] = 4;
console.log(numbers);

Also in my mind I have .push, .splice, etc. I dont know why but i really feel that javascript is not for my brain, haha :D

Clearly duplicate, yep, @diiN__________

Takit Isy
– Takit Isy

2018-03-19 09:29:36 +00:00
Commented Mar 19, 2018 at 9:29 — Takit Isy
– Takit Isy, Commented Mar 19, 2018 at 9:29
sorry, didnt found that one.

Smolskis Dominykas
– Smolskis Dominykas

2018-03-19 09:31:53 +00:00
Commented Mar 19, 2018 at 9:31 — Smolskis Dominykas
– Smolskis Dominykas, Commented Mar 19, 2018 at 9:31

Nina Scholz · Accepted Answer · 2018-03-19 09:23:50Z

6

You could pop the value and unshift it.

var array = [4, 7, 3, 6, 9],
    i = array.length;

while (i--) {
    console.log(array.join(' '));
    array.unshift(array.pop());
}
console.log(array.join(' '));

answered Mar 19, 2018 at 9:23

Nina Scholz

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Comments

Aravind · Accepted Answer · 2018-03-19 09:36:11Z

2

you can use swift and push

function rotate( array , times ){
while( times-- ){
var temp = array.shift();
 array.push( temp )
 }
}

//Test
var players = ['Bob','John','Mack','Malachi'];
rotate( players ,2 )
console.log( players );

answered Mar 19, 2018 at 9:36

Aravind

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Comments

Ankit Agarwal · Accepted Answer · 2018-03-19 09:27:47Z

0

You can simply use splice in conjunction with pop:

var arr = [4,7,3,6,9];
for(var i=0; i<arr.length-1; i++){
  arr.splice(0, 0, arr.pop())
  console.log(arr)
}

answered Mar 19, 2018 at 9:27

Ankit Agarwal

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Comments

Magnus Nordin · Accepted Answer · 2018-03-19 09:33:39Z

0

This is my solution:

var numbers = [4, 7, 3, 6, 9];

for(var i = 0; i < numbers.length; i++) {
    console.log(numbers);
    var lastElement = numbers.pop();
    numbers = [lastElement].concat(numbers);
}

answered Mar 19, 2018 at 9:33

Magnus Nordin

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