大约有 47,000 项符合查询结果（耗时：0.0582秒） [XML]
adding directory to sys.path /PYTHONPATH
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182
This is working as documented. Any paths specified in PYTHONPATH are documented as normally c...
How to check if element has any children in Javascript?
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198
A couple of ways:
if (element.firstChild) {
// It has at least one
}
or the hasChildNod...
passing several arguments to FUN of lapply (and others *apply)
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122
If you look up the help page, one of the arguments to lapply is the mysterious .... When we lo...
Choose newline character in Notepad++
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answered Nov 19 '11 at 17:30
VladVlad
16.7k44 gold badges3636 silver badges6565 bronze badges
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How to create function that returns nothing
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172
Use RETURNS void like below:
CREATE FUNCTION stamp_user(id int, comment text) RETURNS void AS...
Unpivot with column name
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edited Apr 27 '18 at 16:20
dasblinkenlight
659k6969 gold badges945945 silver badges13551355 bronze badges
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Linq with group by having count
...s:
from c in db.Company
group c by c.Name into grp
where grp.Count() > 1
select grp.Key
Or, using the method syntax:
Company
.GroupBy(c => c.Name)
.Where(grp => grp.Count() > 1)
.Select(grp => grp.Key);
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What are the differences between ipython and bpython?
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answered Nov 20 '10 at 15:20
Sven MarnachSven Marnach
446k100100 gold badges833833 silver badges753753 bronze badges
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Mongo: find items that don't have a certain field
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171
Yeah, it's possible using $exists:
db.things.find( { a : { $exists : false } } ); // return i...
How to disable google translate from html in chrome
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edited Mar 19 at 23:34
answered Sep 2 '12 at 17:59
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