本文整理了Arthur O'Dwyer在CppCon 2019上关于RAII的演讲,演讲的slides可以在此链接进行下载. 在C++程序中,我们往往需要管理各种各样的资源.资源通常包括以下几种: Allocated memory (malloc/free, new/delete, new[]/delete[]) POSIX file handles (open/close) C File handles (fopen/fcolse) Mutex locks (pthread_mutex_loc…

本文整理了Arthur O'Dwyer在CppCon 2019上关于RAII的演讲,演讲的slides可以在此链接进行下载. 在C++程序中,我们往往需要管理各种各样的资源.资源通常包括以下几种: Allocated memory (malloc/free, new/delete, new[]/delete[]) POSIX file handles (open/close) C File handles (fopen/fcolse) Mutex locks (pthread_mutex_loc…

Assembler : The Basics In Reversing Indeed: the basics!! This is all far from complete but covers about everything you need to know about assembler to start on your reversing journey! Assembler is the start and the end of all programming languages. A…

Virtualization Basics Virtualization is not a new concept, but its complexity has been growing, and a number of new paradigms are rising. I will try to demystify some of the concepts behind virtualization, briefly explain some of its basics, and fina…

Logistic Regression with a Neural Network mindset Welcome to the first (required) programming exercise of the deep learning specialization. In this notebook you will build your first image recognition algorithm. You will build a cat classifier that r…

Lattice's basics in digital electronics 44.08% 1000ms 131072K   LATTICE is learning Digital Electronic Technology. He is talented, so he understood all those pieces of knowledge in 10^{-9}10−9 second. In the next 10^{-9}10−9 second, he built a data d…

Lattice's basics in digital electronics 题目链接 题目描述 LATTICE is learning Digital Electronic Technology. He is talented, so he understood all those pieces of knowledge in 10−9 second. In the next 10−9 second, he built a data decoding device that decodes…

Salesforce 中 sharing rule 并不支持Look up 字段 和 formula 字段.但在实际项目中,有时会需要在sharing rule中直接取Look up型字段的值,解决方案就是在目标object上新建一个字段,写trigger,将需要获取的Lookup 字段的value 灌入新字段中(我现在就要取Product Catalog表中的External ID字段的值,当USER每次在 Clm_Presentation_vod__c 表 上insert 或者 update…

作者:白狼 出处:http://www.manks.top/yii2_rbac_rule.html 本文版权归作者,欢迎转载,但未经作者同意必须保留此段声明,且在文章页面明显位置给出原文连接,否则保留追究法律责任的权利. 在我们之前yii2搭建后台以及rbac详细教程中,不知道你曾经疑惑过没有一个问题,rule表是做什么的,为什么在整个过程中我们都没有涉及到这张表? 相信我不说,部分人也都会去尝试,或百度或google,到头来也会竹篮打水,这部分讲解的内容少之又少啊! 对于一般的权限系统而言,我…

Role Based Access Control (RBAC)——基于角色的权限控制 permission e.g. creating posts, updating posts role A role represents a collection of permissions (e.g. creating posts, updating posts). A role may be assigned to one or multiple users. rule A rule represen…