MapCollection

MapCollection is basically port from JavaScript Map object for Python. It has same set of functions as Map and also works in nearly the same way. It's worth mention that every key is unique like in JS Map and also you can rewrite values.

In JavaScript you can't use indexers to read, write or remove values from Map, however this feature is supported by MapCollection.

Import

from MapCollection import MapCollection

Constructor

You can pass through constructor an iterable as the initial values.

mapCollection = MapCollection([[3.14, "PI"], [2.71, "E"], [3.14, "Overwritten PI"]])

clear()

Clears MapCollection, returns None.

mapCollection.clear()

delete(key)

Removes particular key from MapCollection, returns True or False whether the entry by supplied key was actually removed.

mapCollection.delete("someKey")

Or:

del mapCollection["someKey"]

entries()

Returns all entries in array.

mapCollection.entries()

foreach(callback)

Iterable function, returns None:

mapCollection.foreach(lambda entry: print("Entry from MapCollection", entry))

get(key)

Returns value selected by key from MapCollection or None if key wasn't found.

mapCollection.get("someKey")

Alternatively:

mapCollection["someKey"]

has(key)

Returns True or False whether the key was found in MapCollection.

mapCollection.has("someKey")

keys()

Returns all keys as array.

mapCollection.keys()

size()

Returns number of values in MapCollection instance.

mapCollection.size()

set(key, value)

Sets a value alongside key or replaces value if key is already present in MapCollection also returns current MapCollection instance so you can chain set function if you want to add multiple values on one line.

mapCollection.set(50, 100)

In addition you can set also value by indexer:

mapCollection[50] = 100

values()

Returns all values in array.

mapCollection.values()