filter¶
Filters data in a map< K, V >, list< T >, or set< T >.
Parameters:
| No. | Type | Comments |
|---|---|---|
| 1 | map< K, V >, list< T > or set< T > | The object to be filtered |
| 2 | A lambda that accepts 1 or 2 parameters and returns a boolean result. | When 1st parameter to filter is a list< T > or set< T >,then the 1st parameter to lambda is one of its elements.When 1st parameter to filter is a map< K, V >, the lambda accepts the key and value per entry. |
Returns:
A map< K, V >, list< T > or set< T > that has been filtered.
Usages:
filter( v:list<T>, e => boolean-expression ) : list<T>filter( v:set<T>, e => boolean-expression ) : set<T>filter( v:map<K, V>, (k, v) => boolean-expression ) : map<K, V>