js omitValuesRecursive

scrub-empty-fields.js

var dang = {dang: '', haha: '', whoops: undefined, whatever: false, hehe: [{what: '', lol: true, ok: false, wow: {haha: 'false', word: [], up: '', ok: false }, why: 0 }, null, 'lol' - 42] };

function omitValuesRecursive(obj, omittedValues) {
    var omittedValues = omittedValues || ['', undefined, null];
    if (window._) {
        return scrubEmptyFieldsLodash(obj);
    }
    return scrubEmptyFields(obj);
    // recursively remove omitted values from the object. modifies the original object
    function scrubEmptyFields(obj) {
        for (var field in obj) {
            if (Array.isArray(obj[field])) {
                obj[field] = obj[field].map(function(item) {
                    return scrubEmptyFields(item);
                }).filter(function(item) {
                    return omittedValues.indexOf(item) === -1 && !Number.isNaN(item);
                });
            } else if (obj[field] !== null && typeof obj[field] === 'object') {
                obj[field] = scrubEmptyFields(obj[field]);
            } else if (omittedValues.indexOf(obj[field]) !== -1 || Number.isNaN(obj[field])) {
                delete obj[field];
            }
        }
        return obj;
    }

    // with lodash
    function scrubEmptyFieldsLodash(obj) {
        _.forIn(obj, function(value, key) {
            if (_.isArray(value)) {
                obj[key] = _.chain(value)
                    .map(function(item) {
                        if (omittedValues.indexOf(item) === -1 && !_.isNaN(item)) {
                            return scrubEmptyFieldsLodash(item);
                        }
                    })
                    .compact()
                    .value();
            } else if (value !== null && typeof value === 'object') {
                obj[key] = scrubEmptyFieldsLodash(value);
            } else if (omittedValues.indexOf(value) !== -1 || _.isNaN(value)) {
                delete obj[key];
            }
        });
        return obj;
    }
}