Key mappings can be deleted or remapped (by any thread) with no adverse affects; the change does not affect a traversal if the key has been seen already, otherwise the traversal skips a deleted key or uses the remapped key’s new value.
If contains no elements, otherwise it returns an integer that is an index to the first element in the hash table; “first” refers to an unspecified ordering of the table elements, and the index values are not necessarily consecutive integers.
These APIs continue to work but will only return data for the first Google account created, which matches the original behavior. The Web View now automatically syncs cookies as necessary.
Add elements to a mutable map by simply assigning them, or with the The methods shown in the Solution demonstrate the most common approaches.
You can also use put to add an element (or replace an existing element); retain to keep only the elements in the map that match the predicate you supply; remove to remove an element by its key value; and clear to delete all elements in the map.
But as you know, when writing your code, an update almost always comes with conditions that have to be checked.
The typical way we’ve been solving this for maps has been by creating if-statements and other imperative code to do checks against the map before actually updating it.
This is Recipe 11.16, “How to Add, Update, and Remove Elements with Immutable Maps” You want to add, update, or delete elements when working with an immutable map.
Use the correct operator for each purpose, remembering to assign the results to a new map.If any levels do not exist, hash-maps will be created., and keys are retained either strongly or weakly (see Weak Boxes). Immutable hash tables support effectively constant-time access and update, just like mutable hash tables; the constant on immutable operations is usually larger, but the functional nature of immutable hash tables can pay off in certain algorithms., take time proportional to the size of the value.A Drawable is a general abstraction for "something that can be drawn." Most often you will deal with Drawable as the type of resource retrieved for drawing things to the screen; the Drawable class provides a generic API for dealing with an underlying visual resource that may take a variety of forms.An Editor Info describes several attributes of a text editing object that an input method is communicating with (typically an Edit Text), most importantly the type of text content it contains and the current cursor position.To be clear about the approach, the following examples use an immutable map with a series of was defined as a var, it’s being reassigned during each step in the process.