When crafting highly adaptable code, there are instances where we aim to steer clear of embedding picklist values directly and instead retrieve them dynamically from the field in real-time.
The following code snippet requires two parameters: the Object and the picklist field name. With these inputs, we can retrieve either the Picklist label or the Picklist value (API Name).
String objectName = 'Contact';
String fieldName ='LeadSource';
Schema.SObjectType s = Schema.getGlobalDescribe().get(objectName) ;
Schema.DescribeSObjectResult r = s.getDescribe() ;
Map<String,Schema.SObjectField> fields = r.fields.getMap() ;
Schema.DescribeFieldResult fieldResult = fields.get(fieldName).getDescribe();
List<Schema.PicklistEntry> ple = fieldResult.getPicklistValues();
for( Schema.PicklistEntry pickListVal : ple){
System.debug(pickListVal.getLabel() +' '+pickListVal.getValue());
}