Given two 1d vectors, implement an iterator to return their elements alternately. Example: Input: v1 = [1,2] v2 = [3,4,5,6] Output: [1,3,2,4,5,6] Explanation: By calling next repeatedly until hasNext returns false,   the order of elements returned by…
Given two 1d vectors, implement an iterator to return their elements alternately. For example, given two 1d vectors: v1 = [1, 2] v2 = [3, 4, 5, 6] By calling next repeatedly until hasNext returns false, the order of elements returned by next should b…
Problem: Given two 1d vectors, implement an iterator to return their elements alternately. For example, given two 1d vectors: v1 = [1, 2] v2 = [3, 4, 5, 6] By calling next repeatedly until hasNext returns false, the order of elements returned by next…
题目: Given two 1d vectors, implement an iterator to return their elements alternately. For example, given two 1d vectors: v1 = [1, 2] v2 = [3, 4, 5, 6] By calling next repeatedly until hasNext returns false, the order of elements returned by next shou…
作者: 负雪明烛 id: fuxuemingzhu 个人博客:http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 deque 日期 题目地址:https://leetcode-cn.com/problems/zigzag-iterator/ 题目描述 Given two 1d vectors, implement an iterator to return their elements alternately. Example: Input: v1 = [1,2]…
Given an Iterator class interface with methods: next() and hasNext(), design and implement a PeekingIterator that support the peek() operation -- it essentially peek() at the element that will be returned by the next call to next(). Here is an exampl…
[抄题]: Given two 1d vectors, implement an iterator to return their elements alternately. Example: Input: v1 = [1,2] v2 = [3,4,5,6] Output: [1,3,2,4,5,6] Explanation: By calling next repeatedly until hasNext returns false,   the order of elements retur…
这道题是LeetCode里的第6道题. 题目要求: 将一个给定字符串根据给定的行数,以从上往下.从左到右进行 Z 字形排列. 比如输入字符串为 "LEETCODEISHIRING" 行数为 3 时,排列如下: L C I R E T O E S I I G E D H N 之后,你的输出需要从左往右逐行读取,产生出一个新的字符串,比如:"LCIRETOESIIGEDHN". 请你实现这个将字符串进行指定行数变换的函数: string convert(string s…
The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility) P A H N A P L S I I G Y I R And then read line by line: "PAHNAPLSII…
Zigzag Iterator Given two 1d vectors, implement an iterator to return their elements alternately. For example, given two 1d vectors: v1 = [1, 2] v2 = [3, 4, 5, 6] By calling next repeatedly until hasNext returns false, the order of elements returned…
迭代模式(iterator pattern) Java 迭代器(Iterator) 详细解释 本文地址: http://blog.csdn.net/caroline_wendy 參考迭代器模式(iterator pattern): http://blog.csdn.net/caroline_wendy/article/details/35254643 Java的标准库(util)中包括迭代器接口(iterator interface), import java.util.Iterator; 继承…
一.基本概念 迭代器是一个对象,也是一种设计模式,Java有两个用来实实现迭代器的接口,分别是Iterator接口和继承自Iterator的ListIterator接口.实现迭代器接口的类的对象有遍历集合对象,选择集合中的元素和删除集合中元素的方法.而在使用它时不必知道该集合对象底层的结构.Java类库中实现Iterator接口的迭代器只能正向遍历集合中的元素,而实现ListIterator接口的迭代器不仅能够正向遍历,还能够反向遍历集合中的元素. 二.源码分析 2.1.Iterator接口与L…
以下介绍接口: List接口:(介绍其下的两个实现类:ArrayList和LinkedList) ArrayList和数组非常类似,其底层①也用数组组织数据,ArrayList是动态可变数组. ① 底层:指存储格式.说明ArrayList对象都是存在于数组中. 注:数组和集合都是从下标0开始. ArrayList有一个add(Object o)方法用于插入数组. ArrayList的使用:(完成这个程序) 先import java.util.*: 用ArrayList在一个数组中添加数据,并遍历…
Leetcode(6)Z字形变换 [题目表述]: 将一个给定字符串根据给定的行数,以从上往下.从左到右进行 Z 字形排列. 比如输入字符串为 "LEETCODEISHIRING" 行数为 3 时,排列如下: L C I R E T O E S I I G E D H N 之后,你的输出需要从左往右逐行读取,产生出一个新的字符串,比如:"LCIRETOESIIGEDHN". 第一次:找下标规律按行输出 执行用时:84 ms: 内存消耗:11.8MB 效果:还行 cla…
Description Follow up Zigzag Iterator: What if you are given k 1d vectors? How well can your code be extended to such cases? The "Zigzag" order is not clearly defined and is ambiguous for k > 2 cases. If "Zigzag" does not look right…
Given two 1d vectors, implement an iterator to return their elements alternately. For example, given two 1d vectors: v1 = [1, 2] v2 = [3, 4, 5, 6] By calling next repeatedly until hasNext returns false, the order of elements returned by next should b…
原题链接在这里:https://leetcode.com/problems/zigzag-iterator/ 题目: Given two 1d vectors, implement an iterator to return their elements alternately. For example, given two 1d vectors: v1 = [1, 2] v2 = [3, 4, 5, 6] By calling next repeatedly until hasNext ret…
作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 公众号:负雪明烛 本文关键词:字形变换,ZigZag,题解,Leetcode, 力扣,Python, C++, Java 目录 题目描述 题目大意 解题方法 公式 日期 题目地址:https://leetcode.com/problems/zigzag-conversion/description/ 题目描述 The string "PAYPALISHIRING" is wr…
Given an Iterator class interface with methods: next() and hasNext(), design and implement a PeekingIterator that support the peek() operation -- it essentially peek() at the element that will be returned by the next call to next(). Here is an exampl…
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 encoding of some sequence.  More specifically, for all even i, A[i] tells us the number of times that…
一.题目链接:https://leetcode.com/problems/zigzag-conversion/description/ 二.题目大意: 给定一个字符串和一个数字,将其转换成Zigzag形式后,逐行输出该字符串.所谓的Zigzag形式,具体如下: /*n=numRows Δ=2n-2 1 2n-1 4n-3 Δ= 2 2n-2 2n 4n-4 4n-2 Δ= 3 2n-3 2n+1 4n-5 . Δ= . . . . . Δ= . n+2 . 3n . Δ= n-1 n+1 3n-…
https://leetcode.com/problems/zigzag-conversion/ The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility) P A H N A P L S I I G Y…
https://leetcode.com/problems/zigzag-conversion/ 题目: 将字符串转化成zigzag模式. 例如 "abcdefghijkmlnpq" 当为4行,zigzag模式为: a    g    l b f h m n c e i k   p d   j      q 输出为aglbfhmnceikpdjq 当为5行,zigzag模式为: a    i b h j q c g k p d f l  n e   m 输出为aibhjqcgkpdfl…
Given two 1d vectors, implement an iterator to return their elements alternately. For example, given two 1d vectors: v1 = [1, 2] v2 = [3, 4, 5, 6] By calling next repeatedly until hasNext returns false, the order of elements returned by next should b…
题目来源:https://leetcode.com/problems/zigzag-conversion/ The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility) P A H N A P L S I…
# -*- coding: utf8 -*-'''__author__ = 'dabay.wang@gmail.com'https://oj.leetcode.com/problems/zigzag-conversion/ The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this:(you may want to display this pattern…
题目: The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility) P A H N A P L S I I G Y I R And then read line by line: "PAHNAP…
1.题目 The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility) P A H N A P L S I I G Y I R And then read line by line: "PAHNA…
// ES5 // 对于数组,使用标准的 for 循环,其实这种方式并不是在遍历值,而是遍历下标来指向值!ES5中增加了一些数组迭代器:forEach.every.some // forEach:遍历数组中的所有值并忽略回调函数的返回值 // every:一直运行直到回调函数返回 false // some:一直运行直到回调函数返回 true // 对于对象, for..in 循环实际上遍历的是对象的可枚举属性列表(包括原型链)需要手动获取属性值 // 手动实现一个类似内置迭代器的 @@iter…
题目 The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility) P A H N A P L S I I G Y I R And then read line by line: "PAHNAPL…