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The logical size and capacity of the final array are shown. In computer science, a dynamic array, growable array, resizable array, dynamic table, mutable array, or array list is a random access, variable-size list data structure that allows elements to be added or removed. It is supplied with standard libraries in many modern mainstream ...
Dead store example in Java: // DeadStoreExample.java import java.util.ArrayList ; import java.util.Arrays ; import java.util.List ; public class DeadStoreExample { public static void main ( String [] args ) { List < String > list = new ArrayList < String > (); // This is a Dead Store, as the ArrayList is never read.
Memory layout of a jagged array. In computer science, a jagged array, also known as a ragged array [ 1] or irregular array [ 2] is an array of arrays of which the member arrays can be of different lengths, [ 3] producing rows of jagged edges when visualized as output. In contrast, two-dimensional arrays are always rectangular [ 4] so jagged ...
This example uses a String as the state, which is an immutable object in Java. In real-life scenarios the state will almost always be a mutable object, in which case a copy of the state must be made. It must be said that the implementation shown has a drawback: it declares an internal class.
In computer science, an associative array, map, symbol table, or dictionary is an abstract data type that stores a collection of (key, value) pairs, such that each possible key appears at most once in the collection. In mathematical terms, an associative array is a function with finite domain. [ 1] It supports 'lookup', 'remove', and 'insert ...
Observer pattern. In software design and engineering, the observer pattern is a software design pattern in which an object, named the subject, maintains a list of its dependents, called observers, and notifies them automatically of any state changes, usually by calling one of their methods . It is often used for implementing distributed event ...
In computing, a hash table is a data structure often used to implement the map (a.k.a. dictionary or associative array) abstract data type. A hash table uses a hash function to compute an index, also called a hash code, into an array of buckets or slots, from which the desired value can be found. During lookup, the key is hashed and the ...
Java collections framework. The Java collections framework is a set of classes and interfaces that implement commonly reusable collection data structures. [ 1] Although referred to as a framework, it works in a manner of a library. The collections framework provides both interfaces that define various collections and classes that implement them.