大约有 40,000 项符合查询结果（耗时：0.0370秒） [XML]
Add st, nd, rd and th (ordinal) suffix to a number
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Counting DISTINCT over multiple columns
... you are trying to improve performance, you could try creating a persisted computed column on either a hash or concatenated value of the two columns.
Once it is persisted, provided the column is deterministic and you are using "sane" database settings, it can be indexed and / or statistics can be ...
log4j: Log output of a specific class to a specific appender
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What JSON library to use in Scala? [closed]
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Unfortunately writing a JSON library is the Scala community's version of coding a todo list app.
There are quite a variety of alternatives. I list them in no particular order, with notes:
parsing.json.JSON - Warning this library is available only up to Scala version 2.9.x...
Linking R and Julia?
Julia looks very promising for fast and syntax-sane computation (e.g. here ), but I suspect it will not be anywhere near R in terms of overall statistics workflow for some time yet. So I'd like to use it where C++ is mainly used in R programs: to optimize slow portions of code. Before I invest th...
How do I determine if a port is open on a Windows server? [closed]
...a the default option 'telnet' is not recognized as an internal or external command, operable program or batch file. To solve this, just enable it: Click *Start** → Control Panel → Programs → Turn Windows Features on or off. In the list, scroll down and select Telnet Client and click OK.
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Jackson enum Serializing and DeSerializer
...alizer solution pointed out by @xbakesx is an excellent one if you wish to completely decouple your enum class from its JSON representation.
Alternatively, if you prefer a self-contained solution, an implementation based on @JsonCreator and @JsonValue annotations would be more convenient.
So lever...
Accessing MP3 metadata with Python [closed]
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@voyager, ID3v1 tags are simple, ID3v2 tags are complicated as hell... And now I have created BSD wrapper for pytagger github.com/Ciantic/songdetails I have not tagged it yet as released, but it works.
– Ciantic
Jan 18 '10 at 20:30
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How to get the element clicked (for the whole document)?
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