mapSize

mapSize(map map) → integer size

Returns the number of entries in the map map.

Empty map:

mapSize([:]) // 0

new Map().size // 0

len({})  # 0

Map with 3 entries:

var table = ['a': 1, 'b': 2, 'c': 3]
mapSize(table) // 3

const table = new Map([ ['a', 1], ['b', 2], ['c', 3] ])
table.size // 3

table = {'a': 1, 'b': 2, 'c': 3}
len(table)  # 3