Given an Iterator class interface with methods: next() and hasNext(), design and implement a PeekingIterator that support the peek() operation ...
Design and implement a data structure for a compressed string iterator. It should support the following operations:nextandhasNext. The given compressed string will be in the form of each letter follo ...
2017-06-16 13:14 0 3845 推荐指数:
Given an Iterator class interface with methods: next() and hasNext(), design and implement a PeekingIterator that support the peek() operation ...
Given an array of characters, compress it in-place. The length after compression must always be ...
...
Given two 1d vectors, implement an iterator to return their elements alternately. Example: Follow up: What if you are given k 1d vectors? How ...
Write an iterator that iterates through a run-length encoded sequence. The iterator is initialized by RLEIterator(int[] A), where A is a run-length ...
1、简述 在Scala中,迭代器(Iterator)不是一个集合,是构建了一种访问集合的方法。当构建一个集合需要很大的开销时(比如把文件得所有行都读取到内存),迭代器就发挥了很好的作用。 迭代器有两个操作,next 和hasNext。next返回迭代器的下一个元素,hasNext用于 ...
迭代器模式:就是提供一种方法对一个容器对象中的各个元素进行访问,而又不暴露该对象容器的内部细节。 什么是迭代器Iterator? Java集合框架的集合类,我们有时候称之为容器。容器的种类有很多种,比如ArrayList、LinkedList、HashSet...,每种容器都有自己的特点 ...
概述 迭代器是访问集合元素的一种方式。迭代器对象从集合的第一个元素开始访问,直到所有的元素被访问完结束。迭代器只能往前不会后退。 延迟计算或惰性求值 (Lazy evaluation) 迭代器不要求你事先准备好整个迭代过程中所有的元素。仅仅是在迭代至某个元素时才计算该元素,而在这之前 ...