Creating a JavaScript array with each element being a pair of objects

Question

Creating a JavaScript array with each element being a pair of objects

Hey there! I'm trying to create an array where each element is a pair of objects. Something like this:

var Shelves = new arr[][]
var books = new Books[] ;
Shelves[book[i], book[j=i+1]], [book[i+1], book[j=i+1]] and so on......;

I know how to use a for loop to get the elements, but struggling with adding them as pairs in the array. The arr.push method doesn't seem to work :(

build1ArrPairs(1Arr) {
    if (1Arr != undefined || 1Arr!=null) {
        for (var i = 0; i < 1Arr.length; i = i + 1) {
            for (var j = i + 1; j <= 1Arr.length; j++) {
                this.1ArrPair.push(1Arr[i] 1Arr[j]);
                break;
            }
        }
    }
}

Appreciate any help or suggestions. Thanks!

javascript arrays

Answer 1

Answer №1

If you prefer, you have the option of utilizing array#reduce to group your array data.

let names = ['a', 'b','c','d','e'];
let result = names.reduce((accumulator, currentValue, currentIndex) => {
  let index = Math.floor(currentIndex/2);
  if(!Array.isArray(accumulator[index]))
    accumulator[index] = [];
  accumulator[index].push(currentValue);
  return accumulator;
},[]);
console.log(result);

Answer 2

If you prefer, you have the option of utilizing array#reduce to group your array data.

let names = ['a', 'b','c','d','e'];
let result = names.reduce((accumulator, currentValue, currentIndex) => {
  let index = Math.floor(currentIndex/2);
  if(!Array.isArray(accumulator[index]))
    accumulator[index] = [];
  accumulator[index].push(currentValue);
  return accumulator;
},[]);
console.log(result);

Answer 3

Answer №2

One important rule is that variable names cannot begin with a number.

Additionally, to create an array you need to first initialize it and then add elements in pairs before returning the final array:

let result = [];
if (data !== undefined && data !== null) {
    for (let i = 0; i < data.length - 1; i += 2) {
        result.push([data[i], data[i + 1]]);
        // Make sure to include the comma between elements
    }
}
return result;

Answer 4

One important rule is that variable names cannot begin with a number.

Additionally, to create an array you need to first initialize it and then add elements in pairs before returning the final array:

let result = [];
if (data !== undefined && data !== null) {
    for (let i = 0; i < data.length - 1; i += 2) {
        result.push([data[i], data[i + 1]]);
        // Make sure to include the comma between elements
    }
}
return result;

Creating a JavaScript array with each element being a pair of objects

Answer №1

Answer №2

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