Your mission

Implement index_by_id, which returns a dict mapping each id of records to the name of its last record.

See it in action

index_by_id([(7, "kiwi"), (3, "fig")])

{7: 'kiwi', 3: 'fig'}

index_by_id([(5, "ann"), (2, "bo"), (5, "cy")])

{5: 'cy', 2: 'bo'}

index_by_id([])

{}

Your checklist

• records is a list of (id, name) tuples and may be empty. id can be any int and name any string.
• Return a dict with one key per different id of records. An empty records gives {}.
• Each id maps to the name of the last record that has this id.
• The keys come in the order in which each id first appears in records.
• Do not modify records.

Your mission

Implement index_by_id, which returns a dict mapping each id of records to the name of its last record.

See it in action

index_by_id([(7, "kiwi"), (3, "fig")])

{7: 'kiwi', 3: 'fig'}

index_by_id([(5, "ann"), (2, "bo"), (5, "cy")])

{5: 'cy', 2: 'bo'}

index_by_id([])

{}

Your checklist

• records is a list of (id, name) tuples and may be empty. id can be any int and name any string.
• Return a dict with one key per different id of records. An empty records gives {}.
• Each id maps to the name of the last record that has this id.
• The keys come in the order in which each id first appears in records.
• Do not modify records.