How can I use Javascript to iterate twice over an array element?

Question

Please help! I need to declare an empty array (foodTray = []), and run a loop 5x (for each iteration push a food type), the foodTray has to hold a max of 2 types but the total length should not exceed 5.

const foodTypes = ['seafood', 'nuts', 'seeds'];

I had done this =>

'use strict';

let foodTray = [];
const foodTypes = ['seafood', 'nuts', 'seeds'];
for (let x = 0; x < foodTypes.length; x++) {
  const food = foodTypes[x];
  foodTray.push(food); 
  if (foodTray.length < 5) {
    foodTray.push(food); 
  }
}
console.log('I have ' + `${foodTray}.`);

but I was instructed the loop had to run 5 times***** and what I used was the length of the foodTypes.

The desired output should be => I have seafood, seafood, nuts, nuts, seeds.

The problem: I did for (let x = 0; x < *foodTypes.length*; x++) instead, the loop should run 5 times! I am not sure how I can iterate twice over an element.

Could you please clarify what's the problem and what is the desired output? — Chris Qiang
– Chris Qiang, Commented Oct 3, 2020 at 22:32
Well it seems your code is working fine and you are getting your desired output, what is the problem? — Bob
– Bob, Commented Oct 3, 2020 at 22:42
do you mean to add the first 5 twice? if you want it to run over the first 5 foodtypes you could change the for loop : for (let x = 0; x < foodTypes.length && x < 5; x++) but I'm not sure I understand the desired output.. — audzzy
– audzzy, Commented Oct 3, 2020 at 22:42
perhaps you could count the number of food in your foodtray and add it to your if statement? while (foodTray.length < 5 && foodTray.filter(f => f == food).length < 2) { foodTray.push(food)} — Maximilian Peters
– Maximilian Peters, Commented Oct 3, 2020 at 22:45

Bob · Accepted Answer · 2020-10-03 22:47:05Z

3

Your original code is giving you the desired output which is : I have seafood, seafood, nuts, nuts, seeds.

let foodTray = [];
const foodTypes = ['seafood', 'nuts', 'seeds'];
for (let x = 0; x < foodTypes.length; x++) {
  const food = foodTypes[x];
  foodTray.push(food); 
  if (foodTray.length < 5) {
    foodTray.push(food); 
  }
}
console.log('I have ' + `${foodTray}.`);

answered Oct 3, 2020 at 22:47

Bob

16911 bronze badges

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

Collectives™ on Stack Overflow

How can I use Javascript to iterate twice over an array element?

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related