Trigger for Assign Account to Contact based on Email Domain Name in Salesforce

Follow below steps for this Scenario:

Create Domain__c Text Field on Account and Domain__c Formula Text Field on Contact

Formula :

 (MID(Email,FIND('@', Email, 1)+1, (LEN(Email) - FIND('@', Email, 1)+1)))

In this scenario Account Domain__c value like ‘gmail.com’ other examples: yahoo.com,wipro.com,infosys.com

Contact Email like ‘salesforcecodes@gmail.com’ then automatically assign Account to this New Contact

trigger AssignAccountToContactBasedOnEmailDomain on Contact (before insert) {
    List<String> contactEmaildomains = new List<String>();
    for(Contact con : Trigger.new){
        contactEmaildomains.add('%'+con.Domain__c+'%');
    }
    List<Account> accList = [SELECT Id, Domain__c FROM Account WHERE Domain__c 

LIKE :contactEmaildomains];
    Map<String, Id> domainsMap = new Map<String, Id>();
    for(Account a: accList) {
        for(String dom : a.Domain__c.Split(','))
            domainsMap.put(dom, a.Id);
    }
    for(Contact c: Trigger.new) {
        if(domainsMap.get(c.Domain__c) != null) {
            c.AccountId = domainsMap.get(c.Domain__c);
        } 
    }
}