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c++模板元编程:std::invoke源码分析及其实现
在实现invoke之前,我们先看一下标准库种invoke的使用方式 template< class F, class... Args>std::invoke_result_t<F, Args...> invoke(F&& f, Args&&... args) noexcept(/* see belo ...
分类:编程语言   时间:2018-11-23 20:39:04    阅读次数:368
Linux上运行python出现错误“/usr/bin/env: python3: No such file or directory"
If you see the error “: No such file or directory” (with nothing before the colon), it means that your shebang line has a carriage return at the end, ...
分类:编程语言   时间:2018-11-22 11:48:58    阅读次数:3109
注解和反射
一、注解 英文:Annotation 1.1 注解的概念 注解也叫元数据,用来标记代码,描述数据,是有特殊意义的。 1.2 注解作用 1、Javadoc将文档注释生成api文档时,会将一些注解内容生成到Api文档中,如 @return @see @param 2、编译时进行格式检查,如@Overri ...
分类:其他好文   时间:2018-11-22 02:35:09    阅读次数:221
机器学习算法--Elastic Net
1) alpha : float, optional Constant that multiplies the penalty terms. Defaults to 1.0. See the notes for the exact mathematical meaning of this param ...
分类:编程语言   时间:2018-11-19 11:05:25    阅读次数:1223
CentOS启动docker1.13失败(Job for docker.service failed because the control process exited with error code. See "systemctl status docker.service" and "journalctl -xe" for details.)
一、启动失败 1.启动docker [root@localhost ~]# systemctl start docker Job for docker.service failed because the control process exited with error code. See "sy ...
分类:其他好文   时间:2018-11-18 13:10:18    阅读次数:616
Centos7:Failed to start LSB: Bring up/down networking
一开始配置的ifcfg-ens33 问题状态: 执行 service network restart 出现以下错误 Restarting network (via systemctl): Job for network.service failed. See 'systemctl status ne ...
分类:Web程序   时间:2018-11-18 10:19:19    阅读次数:616
hadoop-env.sh
# Licensed to the Apache Software Foundation (ASF) under one# or more contributor license agreements. See the NOTICE file# distributed with this work ...
分类:其他好文   时间:2018-11-17 21:01:05    阅读次数:184
yarn-env.sh
# Licensed to the Apache Software Foundation (ASF) under one or more# contributor license agreements. See the NOTICE file distributed with# this work ...
分类:其他好文   时间:2018-11-17 20:56:15    阅读次数:690
355. Design Twitter
Design a simplified version of Twitter where users can post tweets, follow/unfollow another user and is able to see the 10 most recent tweets in the u ...
分类:其他好文   时间:2018-11-15 22:37:16    阅读次数:182
linux 启动rabbitmq 报错:
linux 启动rabbitmq 报错: Job for rabbitmq-server.service failed because the control process exited with error code. See "systemctl status rabbitmq-server. ...
分类:系统相关   时间:2018-11-12 15:43:23    阅读次数:497
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