How can I use "continue" functionality in the cursor.forEach() method in JavaScript?

General Discussions
#1

How can I use “continue” functionality in the cursor.forEach() method in JavaScript?

I’m building an app using Meteor.js and MongoDB, and I have a question about cursor.forEach(). I want to check some conditions at the beginning of each iteration and skip the current element if I don’t need to perform the operation on it, which would save processing time.

Here is my code:

// Fetch all objects in SomeElements collection
var elementsCollection = SomeElements.find();
elementsCollection.forEach(function(element) {
if (element.shouldBeProcessed == false) {
// Here I would like to continue to the next element if this one // doesn't have to be processed
} else {
// This part should be avoided if not necessary
doSomeLengthyOperation();
}
});

I know that I could convert the cursor to an array using cursor.find().fetch() and then use a regular for-loop to iterate over the elements with continue and break, but I’m interested in finding a similar approach to use with forEach(). I’m looking for guidance on how to implement this with javascript foreach continue techniques.

#2

You can simulate the continue behavior by using an early return within the callback function passed to forEach(). This way, if a condition is met (e.g., shouldBeProcessed is false), you can simply return from the function, effectively skipping the rest of the code for that iteration.

// Fetch all objects in SomeElements collection
var elementsCollection = SomeElements.find();
elementsCollection.forEach(function(element) {
if (!element.shouldBeProcessed) {
return; // Skip to the next iteration
}
// Process the element since it should be processed
doSomeLengthyOperation();
});