大约有 47,000 项符合查询结果（耗时：0.0628秒） [XML]
SQL order string as number
...h forces a conversion to number
select col from yourtable
order by col + 0
BTW MySQL converts strings from left to right. Examples:
string value | integer value after conversion
--------------+--------------------------------
'1' | 1
'ABC' | 0 /* the string does not cont...
matplotlib Legend Markers Only Once
...
K.-Michael Aye
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answered May 27 '11 at 1:22
DSMDSM
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Trying to fire the onload event on script tag
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edited Apr 26 '13 at 8:08
answered Apr 26 '13 at 7:34
Da...
Use JavaScript to place cursor at end of text in text input element
...s as follows:
<input id="search" type="text" value="mycurrtext" size="30"
onfocus="this.value = this.value;" name="search"/>
This works in both IE7 and FF3
share
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improve this answ...
Convert base-2 binary number string to int
...ser_name
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answered Jan 19 '12 at 15:02
unwindunwind
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How to remove an item for a OR'd enum?
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edited Aug 9 '16 at 20:53
David Sherret
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When is memoization automatic in GHC Haskell?
...situations. For example, consider the function
f = \x -> let y = [1..30000000] in foldl' (+) 0 (y ++ [x])
GHC might notice that y does not depend on x and rewrite the function to
f = let y = [1..30000000] in \x -> foldl' (+) 0 (y ++ [x])
In this case, the new version is much less effici...
How can I rename a field for all documents in MongoDB?
Assuming I have a collection in MongoDB with 5000 records, each containing something similar to:
7 Answers
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RegEx: Smallest possible match or nongreedy match
... without matching unless absolutely necessary, use something like (?:blah){0,1}?. For a repeating match (either using {n,} or {n,m} syntax) append a question mark to try to match as few as possible (e.g. {3,}? or {5,7}?).
The documentation on regular expression quantifiers may also be helpful.
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Why does the MongoDB Java driver use a random number generator in a conditional?
...hat this piece of code amounts to
if (!_ok && Math.random() <= 0.1)
return res;
The commit that originally introduced this logic had
if (_ok == true) {
_logger.log( Level.WARNING , "Server seen down: " + _addr, e );
} else if (Math.random() < 0.1) {
_logger.log( Level.WARNING ...