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How do I execute a bash script in Terminal?
...er misunderstanding. Unless the script internally has dependencies which require it to run in a particular directory (like, needing to read a data file which the script inexplicably doesn't provide an option to point to) you should never need to cd anywhere to run it, and very often will not want to...
Select first 4 rows of a data.frame in R
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You can use the "index" answer pointed out elsewhere. In this situation I normally use the slice function in dplyr. (Behavior depends on the grouping.)
– Eduardo Leoni
May 28 '18 at 21:16
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Why do C and C++ compilers allow array lengths in function signatures when they're never enforced?
...he first dimension [10] is ignored; the compiler will not prevent you from indexing off the end (notice that the formal wants 10 elements, but the actual provides only 2). However, the size of the second dimension [20] is used to determine the stride of each row, and here, the formal must match the...
CentOS 6.4下Squid代理服务器的安装与配置 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...开机启动
# /etc/init.d/httpd start
# chkconfig httpd on
C. 创建index.html
# echo "<h1>Squid-Web1/200.168.10.2" > /var/www/html/index.html
D. 修改Web服务器IP地址
将web服务器的IP地址修改为200.168.10.2
# ifconfig eth0 200.168.10.2
5.6 配置客户端IP地址
5.7 ...
NoSQL (MongoDB) vs Lucene (or Solr) as your database
...Roo: Would it be an option to use Lucene as a main DB and create aggregate indexes with MongoDB somehow? Or doesn't that make sense? And Mikos: great answer and +1 for the real-world experience mention.
– Grimace of Despair
Jul 16 '13 at 10:47
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invalid byte sequence for encoding “UTF8”
... -f original_charset -t utf-8 originalfile > newfile
You can change psql (the client) encoding following the instructions on Character Set Support. On that page, search for the phrase "To enable automatic character set conversion".
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.htm vs .html ? Which file extension naming is more correct? [closed]
... This should not be an issue since it’s unlikely that you’ll have both index.htm and index.html sitting in the same folder.
We always use the shorter .htm for our file names since file extensions are typically 3 characters long.
AND MORE ON: http://www.sightspecific.com/~mosh/WWW_FAQ/ext.html ...
size_t vs. uintptr_t
The C standard guarantees that size_t is a type that can hold any array index. This means that, logically, size_t should be able to hold any pointer type. I've read on some sites that I found on the Googles that this is legal and/or should always work:
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Convert List to List
...tains((TFrom)(object)item); }
public void CopyTo(TTo[] array, int arrayIndex) { BaseList.CopyTo((TFrom[])(object)array, arrayIndex); }
public bool Remove(TTo item) { return BaseList.Remove((TFrom)(object)item); }
// IList
public TTo this[int index]
{
get { return (TTo)(o...
how to debug the js in jsfiddle
...l.net folder of the Sources tab of Chrome. You can add breakpoints to the index file shown in the Chrome screenshot below.
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