Using a Comparison Function for the Key Typemn

(这是C++系列随笔的第二篇,这一系列是我练习C++而查的资料)

C++ Primer 5th. Ed. pp. 425

----------------------

Using a Comparison for the Key Type

The type of the operation that a container uses to organize its elements is part of the type of that container. To specify our own operation, we musrt supply the type of that operation when we define the type of an associative container (including prioroty_queue). The operation type is specified following the element type inside the angle brackets that we use to say which type of container we are defining.

Each type inside the angle brackets is just that, a type. We supply a particular comparison operation (that must have the same type as we specified inside the angle brackets, and conversely we msut specify the type inside the angle the same type as we can supply outside) as a constructor argument when we create a container.

----------------------

C++ Primer, 5th. Ed. pp. 249

----------------------

Function Parameter Parameters

Just as with arrays, we cannot define parameters of function

时间: 2024-10-12 21:02:45

Using a Comparison Function for the Key Typemn的相关文章

Supporting Python 3(支持python3)——为Python 3做准备

为Python3作准备 在开始添加Python 3的支持前,为了能够尽可能地顺利过度到Python 3,你应该通过修改对2to3来说很难苦的东西来给你的代码做一些准备.即使你现在不打算迁移到Python 3,有一些事你也可以现在就做,这些事在一些情况下它们甚至会加快你的代码在Python 2下的运行. 你可能想要读在I用现代的用句来改善你的代码 上包含许多其他一些你能够用到你的代码中的改进的章节. 在Python 2.7下运行 这个过程的第一步是让你的代码在Python 2.6或者2.7下运行.

Callback Function

typedef void (*callbackFun)(int a, int b);struct exm { int type; callbackFun fun;}; A pointer is a special kind of variable that holds the address of another variable. The same concept applies to function pointers, except that instead of pointing to

(C/C++) Callback Function

原文: http://www.codeguru.com/cpp/cpp/cpp_mfc/callbacks/article.php/c10557/Callback-Functions-Tutorial.htm Callback Functions Tutorial Introduction If you are reading this article, you probably wonder what callback functions are. This article explains

How to use the function of bind

The usage of  bind  is to define a specified scope for called function. Because the key this is easy to refer another objet, experically window, instead of itself. Please pay attention to look at the following example: 1 //Global variables 2 window.n

Hbase reset方式获取指定key范围内的值

代码如下: <?php class Monitor_Hbase{ private $rest_host = "http://10.99.90.39:8130/";//rest地址 private $ch; function __construct(){ } function post($url, $data){ $ch = curl_init(); $header_str = array("Content-Type: application/json"); c

php利用自定义key,对数据加解密的方法

客户端和服务端通信时,有个场景很常见,通过一个id作为url参数来回传递.假设现在业务上只有这个id标识,那么需要稍微安全一点的通信,对这个id进行加密传输,到服务端再进行解密.这里需要一个服务端进行保密的key,利用这个key进行加密和解密. 加解密的方法如下:$str是需要加解密的字符串,$key是自己定义的一个key // 加密 function encryptStr($str, $key){ $block = mcrypt_get_block_size('des', 'ecb'); $p

jQuery源码06-jQuery = function(){};给JQ对象,添加一些方法和属性,extend : JQ的继承方法,jQuery.extend()

/*! * Includes Sizzle.js 选择器,独立的库 * http://sizzlejs.com/ */ (function( window, undefined ) { //"use strict"; var // rootjQuery = jQuery(document) = $();压缩有用 rootjQuery, // dom是否加载完 readyList, // core_strundefined == 'undefined' core_strundefined

ES6新特性:Function函数扩展, 扩展到看不懂

本文所有Demo的运行环境为nodeJS, 参考:让nodeJS支持ES6的词法----babel的安装和使用 : 函数的默认值: 如果有参数 ,那就用参数, 如果没有参数, 那就用默认的参数: ajax的请求经常要做这些判断, ES6规定了新的表达式, 让判断参数的逻辑更加简单: function fn(a = 1, b = 2, c = 3) { console.log(a,b,c); } fn(); //输出 1, 2, 3; fn(4,5,6); //输出 4, 5, 6 如果调用函数的

【discuzX2】/source/function/function_core.php通用核心函数库文件分析

[php] view plain copy print? <?php /** *      [Discuz!] (C)2001-2099 Comsenz Inc. *      This is NOT a freeware, use is subject to license terms * *      $Id: function_core.php 28890 2012-03-19 02:05:42Z liudongdong $ */ if(!defined('IN_DISCUZ')) { e