Find the Largest Number in an Array

Math library

const findLargest = (myArray) => {
   if(myArray.length === 0) return undefined
   return Math.max(...myArray)
}

Explanation

The Math.max() function is used to find the largest number in a list of numbers. The spread operator is used to pass the elements of the array as arguments to the Math.max() function.

Complexity Analysis

The time complexity for this solution is O(n) where n is the number of elements in the array.

For loop

For loop

const findLargest = (myArray) => {
   if(myArray.length === 0) return undefined
   let largest = myArray[0]
   for(let i = 1; i < myArray.length; i++){
      if(myArray[i] > largest){
         largest = myArray[i]
      }
   }
   return largest
}

Lodash

import {max} from lodash

const findLargest = (myArray) => {
   return max(myArray)
}

Array sorting

const findLargest = (myArray) => {
   return myArray.sort((a,b) => b - a)[0]
}