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What is the difference between \r and \n?
...e separator; Windows tends to use \r\n as a line separator and Macs (up to OS 9) used to use \r as the line separator. (Mac OS X is Unix-y, so uses \n instead; there may be some compatibility situations where \r is used instead though.)
For more information, see the Wikipedia newline article.
EDIT...
“Insufficient Storage Available” even there is lot of free space in device memory
... sure Superuser and Terminal Emulator apps are installed. (They come with most custom ROMs.)
Run Terminal Emulator
Type in su, hit return.
This will bring up a Superuser prompt. Grant access. (You will have to wait three seconds before you can click "Allow".)
Change current directory by typing in cd...
How to list active / open connections in Oracle?
... substr(b.username,1,10) username,
-- b.server,
substr(b.osuser,1,8) os_user,
substr(b.program,1,30) program
from v$session b, v$process a
where
b.paddr = a.addr
and type='USER'
order by spid;
shar...
搭建高可用mongodb集群(二)—— 副本集 - 大数据 & AI - 清泛网 - 专注C/...
...
注意linux生产环境不能安装32位的mongodb,因为32位受限于操作系统最大2G的文件限制。
#解压下载的压缩包
tar xvzf mongodb-linux-x86_64-2.4.8.tgz
4、分别在每台机器上启动mongodb
/data/mongodbtest/mongodb-linux-x86_64-2.4.8/bin/mongod...
Open new Terminal Tab from command line (Mac OS X)
Is it possible to open a new tab in Mac OS X's terminal from the command line in a currently opened tab?
13 Answers
...
When I catch an exception, how do I get the type, file, and line number?
...
import sys, os
try:
raise NotImplementedError("No error")
except Exception as e:
exc_type, exc_obj, exc_tb = sys.exc_info()
fname = os.path.split(exc_tb.tb_frame.f_code.co_filename)[1]
print(exc_type, fname, exc_tb.tb_li...
乐高机器人®组件 · App Inventor 2 中文网
...ion 获取硬件版本()
获取EV3的硬件版本。
GetOSBuild 获取操作系统构建版本()
获取EV3上的操作系统构建版本。
GetOSVersion 获取操作系统版本()
获取EV3上的操作系统版本。
KeepAlive 保持活动(minutes)
在一段时间内防止EV3砖块...
程序员必知 —— 编程语言创始人 - 创意 - 清泛网 - 专注C/C++及内核技术
...计算机科学家, 对C语言和其他编程语言、Multics和Unix等操作系统的发展做出了巨大贡献。在技术讨论中,他常被称为dmr,这是他在贝尔实验室的用户名称 (username)。
Java创始人
詹姆斯·高斯林(英语:James Gosling,1955年5月19...
更改MFC对话框默认的窗口类名 - C/C++ - 清泛网 - 专注C/C++及内核技术
更改MFC对话框默认的窗口类名Windows操作系统中有一个概念——窗口类。窗口类是抽象的,它可以有很多窗口实例,即HWND CWnd。在一个程序中,你可以定制并注册一个窗口类...Windows操作系统中有一个概念——窗口类。窗口类是抽...
C++ 取得系统当前时间 - C/C++ - 清泛网 - 专注C/C++及内核技术
C++ 取得系统当前时间方法一,只能精确到秒#include <time.h> time_t tt = time(NULL); 这句返回的只是一个时间戳 tm* t= localtime(&tt); printf("%d...方法一,只能精确到秒
#include <time.h>
time_t tt = time(NULL);//这句返回的只是一个时间戳
tm* t= l...
