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How to add leading zeros?
...paste0) are often the first string manipulation functions that you come across. They aren't really designed for manipulating numbers, but they can be used for that. In the simple case where we always have to prepend a single zero, paste0 is the best solution.
paste0("0", anim)
## [1] "025499" "02...
Does the default constructor initialize built-in types?
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For all practical purposes - no.
However for implementations that are technically compliant with the C++ standard, the answer is that it depends whether the object is POD or not and on how you initialize it.
According to the C++ standard:
MyNo...
Importing files from different folder
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Note: This answer was intended for a very specific question. For most programmers coming here from a search engine, this is not the answer you are looking for. Typically you would structure your files into packages (see other answers) instead of modifying the search path.
By default, you c...
Can't connect to local MySQL server through socket homebrew
...ql.sock
This solved it for me. Now my phpMyAdmin works happily with localhost and 127.0.0.1.
Credit goes to Henry
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How to sort the files according to the time stamp in unix? [closed]
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"Newest" one at the bottom:
ls -tr
None of this is a creation time. Most Unix filesystems don't support creation timestamps.
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“历史遗留”漏洞：浅析新型SSL/TLS漏洞FREAK - 创意 - 清泛网 - 专注C/C++及内核技术
...EAK漏洞对它进行攻击。现在像安卓、苹果手机，以及运行OS X系统的苹果Mac电脑，如果该设备含有SSL/TLS协议漏洞，即使使用HTTPS网站后依然可能遭受中间人攻击。好在Windows和Linux用户，目前并未受到该漏洞影响。
FREAK漏洞与POODLE...
窗口style中CHILD POPUP OVERLAPPED三者的区别 - C/C++ - 清泛网 - 专注C/C++及内核技术
...APPED-->重叠窗口POPUP --->弹出式窗口CHILD -->子窗口--------os默认是的POPUP，要注意，WS_CHILD和WS_POPUP是矛盾的，不...OVERLAPPED --> 重叠窗口
POPUP ---> 弹出式窗口
CHILD --> 子窗口
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os默认是的POPUP，要注意，WS_CHILD...
小端模式 和 大端模式的决定因素 - C/C++ - 清泛网 - 专注C/C++及内核技术
...定因素小端模式 和 大端模式：几乎是由CPU决定的，而非OS或编译器。大端模式和小端模式的区别这里暂不讨论，这里讨论他们是由操作系统、CPU还是编译器决定的呢？
通常来讲，可能大多数人认为是操作系统决定，Windows小端...
oracle:完整剖析PL/SQL DEVELOPER与SQL PLUS字符集设置 - 数据库(内核) - ...
...版本不限）
1、影响PL/SQL DEVELOPER字符集显示的要素
1.1 OS系统当前字符集
936表示操作系统当前字符集为简体中文，同ZHS16GBK.
1.2 ORACLE注册表
该键值默认读取OS系统当前字符集，当然可以修改。
1.3 系统环境变量NLS_LANG
环...
谷歌开源桌面操作系统 ChromeOS 安装体验 - 操作系统(内核) - 清泛网 - 专...
谷歌开源桌面操作系统 ChromeOS 安装体验ChromeOS是谷歌google开发的一个开源操作系统，为网络云端用户提供了一种更快速，更简单，更安全的上网体验！下面我们就来体验下最新的Chro...ChromeOS是谷歌google开发的一个开源操作系统，...