大约有 3,500 项符合查询结果（耗时：0.0298秒） [XML]
Drop unused factor levels in a subsetted data frame
...sing gdata for just drop.levels yields "gdata: read.xls support for 'XLS' (Excel 97-2004) files ENABLED." "gdata: Unable to load perl libaries needed by read.xls()" "gdata: to support 'XLSX' (Excel 2007+) files." "gdata: Run the function 'installXLSXsupport()'" "gdata: to automatically download and ...
TCP 的那些事儿（上） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...通过这些英文关键词来查找相关的技术文档。
之所以想写这篇文章，目的有三个，
一个是想锻炼一下自己是否可以用简单的篇幅把这么复杂的TCP协议描清楚的能力。
另一个是觉得现在的好多程序员基本上不会认认真真地读...
How do I simulate a low bandwidth, high latency environment?
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There's an excellent writeup of setting up a FreeBSD machine to do just this - take your standard old desktop, toss in an additional NIC, and build.
The writeup is available at http://www.freebsd.org/doc/en/articles/filtering-bridges/a...
Pros and cons of Java rules engines [closed]
...he others is the way the rules are modified and handled. It all happens in Excel tables, which is the easiest way for non-programmers. Everybody involved, even the non-technical people, understood everything perfectly :-)
We also have drools integrated, but the rules are way more complicated to und...
How should I choose an authentication library for CodeIgniter? [closed]
...full featured
Medium footprint (25+ files), but manages to feel quite slim
Excellent documentation, although some is in slightly broken English
Language file support
reCAPTCHA supported
Hooks into CI's validation system
Activation emails
Unactivated accounts auto-expire
Suggests grc.com for salts (n...
Check to see if a string is serialized?
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@Peter : excellent remark ; I've edited my answer with a proposition to deal with that case ; thanks !
– Pascal MARTIN
Sep 2 '09 at 20:40
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Mac SQLite editor [closed]
...DATE: Since December 2008, Base is now up to version 2.1, it has become an excellent product. I don't remember what it used to cost, but I paid for the 1.x to 2.x upgrade. Still highly recommended.
ANOTHER UPDATE: Base is available on the Mac App Store, you may find it useful to read the reviews th...
StringFormat Localization issues in wpf
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Excellent! This worked wonderfully! I have no problem adding this to the few places where its needed. Btw your example is missing a }
– Johncl
Dec 13 '11 at 11:49
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How can I find non-ASCII characters in MySQL?
I'm working with a MySQL database that has some data imported from Excel . The data contains non- ASCII characters (em dashes, etc.) as well as hidden carriage returns or line feeds. Is there a way to find these records using MySQL?
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Import CSV to mysql table
...t and upload the information using the following SQL syntax.
To import an Excel file into MySQL, first export it as a CSV file. Remove the CSV headers from the generated CSV file along with empty data that Excel may have put at the end of the CSV file.
You can then import it into a MySQL table by ...