function domainType(domains) {
    let result = []
    const domainMap = {
        "org" : "organization",
        "com" : "commercial",
        "net" : "network", 
        "info" : "information"
    }
    
    for (let i=0; i< domains.length; i++) {
        const splitDomain = domains[i].split(".")
        const lastElement = splitDomain[splitDomain.length-1]
        result[i] = domainMap[lastElement]
        // console.log(result)
        // result.push(domainMap[lastElement])
    }
    return result
}

/*or:

function domainType(domains) {
    let result = []
    const org = "organization"
    const com = "commercial"
    const net = "network"
    const info = "information"
    
    for (let i=0; i< domains.length; i++) {
        const domain = domains[i]
        const splitDomain = domain.split(".")
        const lastElement = splitDomain[splitDomain.length-1]
        
        if (lastElement.includes("org")) {
            result.push(org) 
        } else if (lastElement.includes("com")) {
            result.push(com) 
        } else if (lastElement.includes("net")) {
            result.push(net) 
        } else if (lastElement.includes("info")) {
            result.push(info) 
        }
    }
    return result
}

or:

function domainType(domains) {
    let result = []
    let org = "organization"
    let com = "commercial"
    let net = "network"
    let info = "information"
    
    for (let i=0; i< domains.length; i++) {
        let domain = domains[i]
        if (domain.includes("org")) {
            result.push(org) 
        } else if (domain.includes("com")) {
            result.push(com) 
        } else if (domain.includes("net")) {
            result.push(net) 
        } else if (domain.includes("info")) {
            result.push(info) 
        }
    }
    return result
}


/**
* 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"]);
    });
});