Optimizing nested collections with JavaScript arrays of boolean values

I have multiple nested collections of JavaScript objects and I believe there has to be a more efficient way to achieve what I'm doing. The goal is to access the values of the fields in Objects 1, 2, and 3 and check if they are true or false. Below is my current code:

var valid = [];
if (objects instanceof Array) {
    for (var i = 0; i < objects.length; i++) {
        var fieldIsFull = [];
        // Loop through all fields to check if empty and build array
        for (var j = 0; j < objects[i].Fields.length; j++) {
            if (objects[i].Fields[j].isRequired) {
                if (objects[i].Fields[j].Value != null ||
                    objects[i].Fields[j].Value != undefined) {
                    fieldIsFull.push(true);
                } else {
                    fieldIsFull.push(false);
                }
            }
        }

        // Check array for any false value.
        if ($.inArray(false, fieldIsFull) >= 0) {
            valid.push(false);
        } else {
            valid.push(true);
        }
}
// Check array for any false value.
if ($.inArray(false, valid) >= 0) {
    return false;
} else {
    return true;
}

If anyone has suggestions on a more optimized approach to accomplish this task, I would greatly appreciate it.

SOLUTION: After some experimentation, I came up with the following revised code as I only needed the false value:

if (objects instanceof Array) {
    for (var i = 0; i < objects.length; i++) {
        // Loop through all fields to check if empty
        for (var j = 0; j < objects[i].Fields.length; j++) {
            if (objects[i].Fields[j].isRequired) {
                if (objects[i].Fields[j].Value == null) {
                    return false;
                }
            }
        }
}
return true;

Answer №1

It appears that the issue lies in your function not properly extracting the inner values of the array. To address this, consider adding an early exit condition - for instance, instead of pushing false to fieldIsFull, simply return false;. In case the function reaches its conclusion successfully, ensure to return true. You can eliminate any lines related to the fieldIsFull and valid arrays to simplify the logic.

Answer №2

Instead of creating an array, you can simply use boolean operations to keep track of whether any false values have been encountered. It's not necessary to compare both null and undefined, as using != will automatically convert undefined to null.

for (var i = 0; i < items.length; i++) {
    var isAllValid = true;
    
    // Iterate through all fields to check for emptiness and create an array
    for (var j = 0; isAllValid && j < items[i].Fields.length; j++) {
        if (items[i].Fields[j].isRequired) {
            isAllValid = isAllValid && items[i].Fields[j].Value != null;
        }
    }

    validItems.push(isAllValid);
}

edit — yes, the point made by @AndrewVarnerin in the other answer is valid - if you encounter a false (empty) "Value", simply do a return false; immediately, since that's the ultimate action the function will take. However, if you need to perform some actions for each empty value, then loop through everything (and move the test on "isAllValid" out of the for loop above).

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