由浅入深学习 map 容器 by 彭于斌（ @archibate ） 我负责监督你鞋习 ! 我负责监督你鞋习 ! 本期看点： 用方括号 [ ] 取出 map 元素居然是错误的！ 能不能在遍历的同时删除元素？安全吗？ emplace ， emplace_hint ， try_emplace 的区别？ 课程安排 1. vector 容器初体验 & 迭代器入门 (BV1qF411T7sd) 2 set 容器 & 迭代器分类 (BV1m34y157wb) 3. string ， string_view ， const char * 的爱恨纠葛 (BV1ja411M7Di) 4. 万能的 map 容器全家桶及其妙用举例 ( 本期 ) 5. 函子 functor 与 lambda 表达式知多少 6. 通过实战案例来学习 STL 算法库 7. C++ 标准输入输出流 & 字符串格式化 8. traits 第一章：读取与写入 我负责监督你鞋习 ! 我负责监督你鞋习 ! map 查找元素的两个接口 • map 提供了两个查找元素的接口，一曰 [] ，二曰 at 。 • 那么他们两个又有什么区别呢？很多新手都分不清他俩，可能只认识 [] 。 读取 map 元素 • map m; • 读取 map 中指定键值的元素有两种方法。 • val = m[“key”];

4, 2019 ���� �����List����Set�����Map�的������� ���������� ������iterator��Enumeration ��������� API ������的������������ 1 28 �� 1 ������� 2 Collection � Map �� 3 �� 4 Iterator �� 5 � 6 �� ��������的������������� ������������的��� �� List ������的��������������� ������的���������������� �������� �� Map �����的��¡���Key-Value������ �������的���������������  注意 Java 集合中只能保存引用类型的数据，实际上存放的是对象的引用 而非对象本身。Java ��������的������������� ������������的��� �� List ������的��������������� ������的���������������� �������� �� Map �����的��¡���Key-Value������ �������的���������������  注意 Java 集合中只能保存引用类型的数据，实际上存放的是对象的引用 而非对象本身。Java

its environment ● Enter: The occupancy map ○ A data structure used to represent the environment around a robot in terms of how “occupied” the cells in the map are Clip from https://www.youtube.com/watch occupancy map ○ A data structure used to represent the environment around a robot in terms of how “occupied” the cells in the map are ● Assumption: The robot knows its location in the occupancy map at all occupancy map ○ A data structure used to represent the environment around a robot in terms of how “occupied” the cells in the map are ● Assumption: The robot knows its location in the occupancy map at all

Introduction Persistent Hash Map Persistent Transactional Data Structures Live Demonstration ReferencesIntroduction Persistent Hash Map Persistent Transactional Data Structures Live Demonstration References References Overview Introduction Persistent Memory Use-Cases Pitfalls Persistent Hash Map Design Goals and Methodology Persistence Performance Results Persistent Transactional Data Structures Design Demonstration A Persistent Hash Map for Graph Processing Workloads and a Methodology for Persistent Transactional Data Structures 2IntroductionIntroduction Persistent Hash Map Persistent Transactional Data

environment This is a map of a make-believe distribution facility that is: 0.8 km long 0.4 km deep 51The operating environment This is a spatial graph extracted from the map. 52The operating environment std::for_each #include <map> // std::map, std::multimap #include // std::apply class Graph { private: std::multimap adjacencies_; std::map std::for_each #include <map> // std::map, std::multimap #include // std::apply class Graph { private: std::multimap adjacencies_; std::map

mobile and more cool stuff. We’ll be using a free map editor called Tiled to create our level. One nice thing about Phaser is that you can easily load map files exported from Tiled (JSON format). This Check out the Wikipedia definition if you are not 100% familiar with this concept. To create a new map in Tiled go to File -> New: On width and height specify the number of tiles your level will have many tilesets on your tilemaps. We’ll use just one: assets/images/tiles.png. To load a tileset: Map -> New Tileset The nice retro tileset we’ll use is from Open Game Art and it’s a public domain image

macros are now supported in map element labels, URL names and URL values: New supported location in maps Macros Host element Host group el- e- ment Trigger el- e- ment Map el- e- ment Element ID}, {INVENTORY.*} macros {TRIGGER.ID}, {INVENTORY.*} macros {MAP.ID}, {MAP.NAME} URL name {HOST.ID} {HOSTGROUP.ID} {TRIGGER.ID} {MAP.ID} URL name and value {HOST.CONN}, {HOST.DNS}, {HOST.HOST}, {HOST {INVENTORY.*} macros {MAP.NAME} Note that this table lists only the new locations. So, even though {HOST.ID}, {HOSTGROUP.ID}, {TRIGGER.ID} and {MAP.ID} are listed as now supported in map URL names, they were

on CSP model) and select mechanisms to do synchronizations between goroutines. the container types map and slice are first-class citizens. polymorphism through interfaces. value boxing and reflection through only 25 keywords: break default func interface select case defer go map struct chan else goto package switch const fallthrough if range package, type and var are used to declare all kinds of code elements in Go programs. chan, interface, map and struct are used as parts in some composite type denotations. break, case, continue, default, else

.........................185 8.1.2 Map capacity .............................................................................................188 8.1.3 Slices as map values ............................ .................................................188 8.2 Testing if a key-value item exists in a map—Deleting an element ..........................188 8.3 The for range construct .................... ................191 8.5 Sorting a map ........................................................................................................192 8.6 Inverting a map ..................................

on CSP model) and select mechanisms to do synchronizations between goroutines. the container types map and slice are first-class citizens. polymorphism through interfaces. value boxing and reflection through 25 keywords: 1| break default func interface select 2| case defer go map struct 3| chan else goto package switch 4| const fallthrough if package, type and var are used to declare all kinds of code elements in Go programs. chan, interface, map and struct are used as parts in some composite type denotations. break, case, continue, default,