Syntax error Upper or lower elements count in an array in JavaScript

Upper or lower elements count in an array in JavaScript

Consider we have an array of Numbers that looks like this −

const array = [54,54,65,73,43,78,54,54,76,3,23,78];

We are required to write a function that counts how many of the elements are in the array below / above a given number.

For example, if the number is 60 −

The answer should be 5 elements below it (54,54,43,3,23) and 5 element par it (65,73,78,76,78) Therefore, let’s write the code for this function −

Example

The code for this will be −

const array = [54,54,65,73,43,78,54,54,76,3,23,78];
const belowParNumbers = (arr, num) => {
   return arr.reduce((acc, val) => {
      const legend = ['par', 'below'];
      const isBelow = val < num;
      acc[legend[+isBelow]]++;
      return acc;
   }, {
      below: 0,
      par: 0
   });
};
console.log(belowParNumbers(array, 50));
console.log(belowParNumbers(array, 60));
console.log(belowParNumbers(array, 70));

Output

The output in the console will be −

{ below: 3, par: 9 }
{ below: 7, par: 5 }
{ below: 8, par: 4 }
Updated on: 2020-10-20T11:37:33+05:30

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