function domainType(domains) {
    const myRegex = /.*\.(\w+)/;
    let types = [];
    
    for (let i = 0; i < domains.length ; i++) {
        let extension = domains[i].match(myRegex);
        
        switch (extension[1]) {
            case 'org': 
                return types.push("organization");
            case 'com': 
                return types.push("commercial");
            case 'net': 
                return types.push("network");
            case 'info': 
                return types.push("information");
            default: 
                return false;
        }
    }
        
    return types;
}

/**
* Test Suite 
*/
describe('domainType()', () => {
    it('returns list of domain types', () => {
        // arrange
        const domains = ["en.wiki.org", "codefights.com", "happy.net", "code.info"];
        
        // act
        const result = domainType(domains);

        // log
        console.log("result: ", result);
        
        // assert
        expect(result).toEqual(["organization", "commercial", "network", "information"]);
    });
});