Hybrid Collections

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Hybrid Collections

Updated October 24, 2018

Sometimes a single collection doesn't satisfy all of the access patterns you need. For example, what if you want a collection that remembers order and lets you set values for keys? You will need to construct it out of the existing one.

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Hybrid Types

This is an advanced topic, but interesting nonetheless! Instead of implementing a hybrid using a HashMap, we build our own type. We explore the Clojure implementation of Vector and replicate the methods and interfaces it implements.

Clojure Collections

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Introduction to Clojure's Collections

Data structures

Vector collection

HashMap collection

List collection

Queue collection

Sorted Map collection

Sorted Set collection

Access patterns

Sequential Access Pattern

Remembering Duplicates Access Pattern

Lookup by key Access Pattern

Associate key and value Access Pattern

Dissociate a key and value Access Pattern

Count the elements Access Pattern

Equality Comparison Access Pattern

Removing an item from a set Access Pattern

Splitting a sequence Access Pattern

Containment Check Access Pattern

First-in, first-out Access Pattern

Last-in, First-out Access Pattern

Entity Usage Pattern

Index Usage Pattern

Tuple Usage Pattern

Multi-comparison Usage Pattern

Usage in an Atom

Hybrid Collections

Vectors and Lists in syntax

Collections vs sequences