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Foreign keys in mongo?
...p:"phones"})
> db.foo.find()
{ "_id" : ObjectId("4df6539ae90592692ccc9940"), "group" : "phones" }
{ "_id" : ObjectId("4df6540fe90592692ccc9941"), "group" : "phones" }
>db.foo.find({'_id':ObjectId("4df6539ae90592692ccc9940")})
{ "_id" : ObjectId("4df6539ae90592692ccc9940"), "...
Pointers vs. values in parameters and return values
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edited Aug 26 at 3:04
answered May 8 '14 at 20:34
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Naming conventions for abstract classes
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edited Sep 13 '16 at 20:14
user2864740
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Right way to initialize an OrderedDict using its constructor such that it retains order of initial d
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93
The OrderedDict will preserve any order that it has access to. The only way to pass ordered dat...
What is a None value?
... you have to write yourself with lines like F = "fork" and A = 2 and c17 = 3.14, and then you can stick them on other objects later (like F = 10 or F = None; it's all the same.)
Briggs is pretending that all possible stickers you might want to write were already stuck to the None object.
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MySQL - force not to use cache for testing speed of query
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537
Try using the SQL_NO_CACHE (MySQL 5.7) option in your query.
(MySQL 5.6 users click HERE )
eg....
Why can't I make a vector of references?
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349
The component type of containers like vectors must be assignable. References are not assignabl...
Official reasons for “Software caused connection abort: socket write error”
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edited Jan 13 '19 at 14:12
Alireza Noorali
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I forgot the password I entered during postgres installation
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13 Answers
13
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What's the difference between an exclusive lock and a shared lock?
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ArjunShankarArjunShankar
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