Queue objects ( Queue, LifoQueue, or PriorityQueue) Full ¶Įxception raised when non-blocking put() (or Empty ¶Įxception raised when non-blocking get() (or That ignores the data item and only compares the priority number: If the data elements are not comparable, the data can be wrapped in a class A typical pattern forĮntries is a tuple in the form: (priority_number, data). One that would be returned by min(entries)). The lowest valued entries are retrieved first (the lowest valued entry is the Maxsize is less than or equal to zero, the queue size is infinite. maxsize is an integer that sets the upperbound PriorityQueue ( maxsize = 0 ) ¶Ĭonstructor for a priority queue. Insertion willīlock once this size has been reached, until queue items are consumed. Limit on the number of items that can be placed in the queue. The queue module defines the following classes and exceptions: class queue. In exchange for the smaller functionality. Specific implementation provides additional guarantees In addition, the module implements a “simple” Internally, those three types of queues use locks to temporarily blockĬompeting threads however, they are not designed to handle reentrancy The entries are kept sorted (using the heapq module) and the The first retrieved (operating like a stack). LIFO queue, the most recently added entry is Queue, the first tasks added are the first retrieved. The module implements three types of queue, which differ only in the order in Module implements all the required locking semantics. It is especially useful in threaded programming when information must beĮxchanged safely between multiple threads. The queue module implements multi-producer, multi-consumer queues. Package Ĭlass IndexedPriorityQueue(size: Int, val comparator: Comparator? = null) : Collection. * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * copies or substantial portions of the Software. * The above copyright notice and this permission notice shall be included in all * furnished to do so, subject to the following conditions: * copies of the Software, and to permit persons to whom the Software is * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * in the Software without restriction, including without limitation the rights * of this software and associated documentation files (the "Software"), to deal * Permission is hereby granted, free of charge, to any person obtaining a copy * Copyright (c) 2017 Kotlin Algorithm Club Indexed Priority Queue source code, pseudocode and analysis It reused many ideas and classes from Doug Lea's collection package, which was deprecated as a consequence. To address the need for reusable collection data structures, several independent frameworks were developed, the most used being Doug Lea's collection package, and ObjectSpace Generic collection library (JGL), whose main goal was consistency with the C++ standard Template library (STL).The collections framework was designed and developed chiefly by Joshua Bloch, and was introduced in JDK 1.2.Collection implementations in pre-JDK 1.2 versions of the Java platform included few data structure classes, but make not contain a collections framework. The collections framework provides both interfaces that specify various collections and classes that implement them. The Java collections framework is a set of classes and interfaces that implement normally reusable collection data structures.
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