how to fix a linting no shadowed variable wanring

Question

In this function below I am getting a no shadowed variable warning on line two at .reduce((nestedObject, key) . How can I resolve this?

function deepAccessUsingString(obj, key) {
    return key.split('.').reduce((nestedObject, key) => {
        if (nestedObject && key in nestedObject) {
            return nestedObject[key];
        }
        return undefined;
    }, obj);
}

Answer 1

Your problem is key being used in outer and inner function. You can simply give one of the key a different name.

function deepAccessUsingString(obj, key) {
    return key.split('.').reduce((nestedObject, key2) => {
        if (nestedObject && key2 in nestedObject) {
            return nestedObject[key2];
        }
        return undefined;
    }, obj);
}