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Rediscovering JavaScript: ES6, ES7 & ES8

Solution Review: Lint the Code

Explore effective approaches to lint JavaScript code by applying strict mode for security and using const and let for proper variable declarations. Understand why triple equals comparisons improve code reliability and how these practices help reduce common coding errors in JavaScript.

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Solution

Let’s take a look at the solution code given below.

Javascript (babel-node)
'use strict';
const isPerfect = function(number) {
  let sumOfFactors = 0;
  for(let index = 1; index <= number; index++) {
    if(number % index === 0) {
      sumOfFactors += index;
    }
  }
  return sumOfFactors === number * 2; 
};
for(let i = 1; i <= 10; i++) {
  console.log('is ' + i + ' perfect?: ' + isPerfect(i));
}

Explanation

  • First of all, use strict; is applied to the code to make the code secure.

  • In line 2, the function is defined using ...