ionic-orm-2/src/util/OrmUtils.js

Data-mapper ORM for Ionic WebSQL and SQLite

export class OrmUtils {
    static groupBy(array, propertyCallback) {
        return array.reduce((groupedArray, value) => {
            const key = propertyCallback(value);
            let grouped = groupedArray.find(i => i.id === key);
            if (!grouped) {
                grouped = { id: key, items: [] };
                groupedArray.push(grouped);
            }
            grouped.items.push(value);
            return groupedArray;
        }, []);
    }
    /**
     * Transforms given value into boolean value.
     */
    static toBoolean(value) {
        if (typeof value === "boolean")
            return value;
        if (typeof value === "string")
            return value === "true" || value === "1";
        if (typeof value === "number")
            return value > 0;
        return false;
    }
}
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