Get method
A lookup operation on a mapping or associative collection that returns the value associated with a key or index, often with a null-like result or supplied default when no entry exists.
Clojure: The Essential Reference
get is a Clojure function that retrieves a value associated with a key or index from a collection and returns nil or a supplied fallback when lookup is unavailable.
- How it is used
- Uses `get` for forgiving lookup across maps and other supported collection types, including mixed-type input.
- How deep it goes
- Defines both arities, input-specific results, fallbacks, and notable exceptions, including sorted-key incompatibility and oversized indices.
- Examples
- Demonstrates map lookup, unsupported lists, mixed collections, sorted-map exceptions, and lookup through nested data.
- What you can do after
- Apply it via Clojure's `get` to retrieve values or supply fallbacks while recognizing inputs that need another access function.
Read how Clojure: The Essential Reference explains get method →
Build Your Own Robot: Using Python, CRICKIT, and Raspberry Pi
The get method is a mapping operation that returns the value for a key or a specified default when the key is absent.
- How it is used
- Handles optional environment settings and undefined joystick mappings without raising key errors.
- How deep it goes
- Demonstrates defaulted and default-None lookups in runnable configuration and event-handling code without detailing mapping internals.
- Examples
- Uses motor-adjustment variables and button and axis dictionaries for joystick event output.
- What you can do after
- Apply it via Python mappings to supply configuration defaults and safely label selected input events.
Read how Build Your Own Robot: Using Python, CRICKIT, and Raspberry Pi explains get method →
Related concepts
- findalternative to · A find operation searches a collection for the first element or entry matching a value or predicate and returns it, or indicates that no match exists.
- Mapused by · A map is an associative data structure that stores key-value pairs and supports retrieving values by key.
- vectorused by · A vector is an ordered, indexed sequence of elements, often numerical, represented as a mathematical quantity or a computational collection.
- nthalternative to · nth is an operation that returns the element at a specified zero-based position in a collection, sequence, string, or iterator, when one exists.
- sentinel valueproduces · A sentinel value is a distinguished value interpreted as signaling a special condition, such as a boundary, termination, absence, or exceptional result.
- request messagecontrasts with · An HTTP request is a message sent by a client to a server that specifies a method and target and may include headers and a body.
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