大约有 40,000 项符合查询结果（耗时：0.0463秒） [XML]
Using ls to list directories and their total sizes
...possible to use ls in Unix to list the total size of a sub-directory and all its contents as opposed to the usual 4K that (I assume) is just the directory file itself?
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Make: how to continue after a command fails?
The command $ make all gives errors such as rm: cannot remove '.lambda': No such file or directory so it stops. I want it to ignore the rm-not-found-errors. How can I force-make?
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How to check if type of a variable is string?
...atter, because Python 3.x is not meant to be compatible with Python 2.x at all.
– netcoder
Jul 15 '13 at 17:45
2
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In-App Billing test: android.test.purchased already owned
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Legend this works, @psykhi should really have given you the points. I was trying to consume it but couldn't work out the purchase token. Thanks
– Blundell
Dec 30 '12 at 16:07
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Why is rbindlist “better” than rbind?
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rbindlist is an optimized version of do.call(rbind, list(...)), which is known for being slow when using rbind.data.frame
Where does it really excel
Some questions that show where rbindlist shines are
Fast vectorized merge of list of data.frames by row
Trouble...
Explicit vs implicit SQL joins
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So-called "implicit joins" of the 'inner' or 'cross' variety remain in the Standard. SQL Server is deprecating the "old-style" outer join syntax (i.e. *= and =*) which has never been Standard.
– onedaywhen
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Best cross-browser method to capture CTRL+S with JQuery?
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This is the only answer that worked for me in all the browsers I tested, including Chrome Version 28.0.1500.71
– T. Brian Jones
Jul 22 '13 at 16:49
28
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How to extract year and month from date in PostgreSQL without using to_char() function?
...s for quick reply, but can't we do it in single function or do we have to call it twice for month and year separately
– mokNathal
Apr 24 '17 at 15:22
2
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Integer to hex string in C++
...(sizeof(your_type)*2)
<< std::hex << your_int;
So finally, I'd suggest such a function:
template< typename T >
std::string int_to_hex( T i )
{
std::stringstream stream;
stream << "0x"
<< std::setfill ('0') << std::setw(sizeof(T)*2)
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Remove DEFINER clause from MySQL Dumps
...he dump file is created.
Open the dump file in a text editor and replace all occurrences of DEFINER=root@localhost with an empty string ""
Edit the dump (or pipe the output) using perl:
perl -p -i.bak -e "s/DEFINER=\`\w.*\`@\`\d[0-3].*[0-3]\`//g" mydatabase.sql
Pipe the output through sed:
mysq...