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@liviutudor
Created April 1, 2017 00:49
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Implement a `map`-like without streams
public Collection<Double> extract(Collection<Employee> collection) {
Collection<Double> list = new ArrayList<>();
if( collection == null || collection.isEmpty() ) return list;
for( Employee e : collection ) {
list.add(e.salary);
}
return list;
}
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