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Linux Shell脚本参数的获取方法 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...数$# 参数个数（脚本名除外）$? 取上个命令退出码（exit xx, 函数return xx）一般0成功,1失败#! bin shecho ...$0 (脚本名)，$1-$9 参数$# 参数个数（脚本名除外）
$? 取上个命令退出码（exit xx, 函数return xx）一般0成功,1失败
#!/bin/sh
echo '...
Linux ftp上传文件 实战篇 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
... get等Linux命令完成ftp文件上传下载。连接FTP命令：
$ftp xx.xx.xx.xx
username
password
ftp> passive
（需要关闭passive模式，不然上传不了）
查看远程FTP服务器文件命令：
ftp> ls
若ls卡住不动(如上图)，是由于防火墙未关闭导...
Using HeapDumpOnOutOfMemoryError parameter for heap dump for JBoss
I was told I can add the -XX:+HeapDumpOnOutOfMemoryError parameter to my JVM start up options to my JBoss start up script to get a heap dump when we get an out of memory error in our application. I was wondering where this data gets dumped? Is it just to the console, or to some log file? If it'...
Stack Overflow：StackExchange网络不同主题网站的”祖父“ - 更多技术 - ...
...ck Overflow：StackExchange网络不同主题网站的”祖父“2月24日消息，由Facebook前员工亚当•德安吉罗（Adam D'Angelo）和查理•奇弗（Charlie Cheever）创立的问答网站Quora显然是...2月24日消息，由Facebook前员工亚当•德安吉罗（Adam D'A...
HTML5 Canvas Resize (Downscale) Image High Quality?
... var w0 = dy * dy; //pre-calc part of w
var xx_start = Math.floor(i * ratio_w);
var xx_stop = Math.ceil((i + 1) * ratio_w);
for (var xx = xx_start; xx < xx_stop; xx++) {
var dx = Math.abs(center_x - (xx + 0.5)) / r...
How do I use LINQ Contains(string[]) instead of Contains(string)
...; table = GetDataFromSomewhere();
List<user> newTable = table.Where(xx => uids.Contains(xx.uid)).ToList();
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地图组件（高德地图） · App Inventor 2 中文网
... 根据描述生成特征 方法将其转换为组件。
坐标无效(消息)
当程序在处理地理数据时遇到无效点时，会触发 坐标无效 事件。
当点的经度或纬度超出可接受范围（分别为 [-90, 90] 和 [-180, 180]）时，该点被视为无效。
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what happens when you type in a URL in browser [closed]
...t
browser checks if the response is a redirect or a conditional response (3xx result status codes), authorization request (401), error (4xx and 5xx), etc.; these are handled differently from normal responses (2xx)
if cacheable, response is stored in cache
browser decodes response (e.g. if it's gzipp...
Equivalent of LIMIT and OFFSET for SQL Server?
...IELD}) as r_n_n
from {YOUR TABLES} where {OTHER OPTIONAL FILTERS}
) xx where r_n_n >={OFFSET HERE}
A note:
This solution will only work in SQL Server 2005 or above, since this was when ROW_NUMBER() was implemented.
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sed: print only matching group
...up within a pattern, you can do it with a 2nd grep.
# To extract \1 from /xx([0-9]+)yy/
$ echo "aa678bb xx123yy xx4yy aa42 aa9bb" | grep -Eo 'xx[0-9]+yy' | grep -Eo '[0-9]+'
123
4
# To extract \1 from /a([0-9]+)b/
$ echo "aa678bb xx123yy xx4yy aa42 aa9bb" | grep -Eo 'a[0-9]+b' | grep -Eo '[0-9]+'
...