Arrays in JavaScript have several methods for filtering, mapping or folding that require a callback. Not having a return statement in such a callback function is most likely a mistake.
This rule applies for the following methods of an array:
Array.from
Array.prototype.every
Array.prototype.filter
Array.prototype.find
Array.prototype.findIndex
Array.prototype.map
Array.prototype.reduce
Array.prototype.reduceRight
Array.prototype.some
Array.prototype.sort
Noncompliant Code Example:
var merged = arr.reduce(function(a, b) {
a.concat(b);
}); // Noncompliant: No return statement
Compliant Solution
var merged = arr.reduce(function(a, b) {
return a.concat(b);
});
Arrays in JavaScript have several methods for filtering, mapping or folding that require a callback. Not having a return statement in such a callback function is most likely a mistake.
This rule applies for the following methods of an array:
Array.fromArray.prototype.everyArray.prototype.filterArray.prototype.findArray.prototype.findIndexArray.prototype.mapArray.prototype.reduceArray.prototype.reduceRightArray.prototype.someArray.prototype.sortNoncompliant Code Example:
Compliant Solution
https://github.com/wazuh/wazuh-api/blob/7cd5ef15f668f52324c7f8ebf8677fb1e1106aaf/helpers/filters.js#L152-L155