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How to check if an array field contains a unique value or another array in MongoDB?
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220
Try this out:
db.blogpost.find({ 'tags' : 'tag1'}); //1
db.blogpost.find({ 'tags' : { $all : [...
How do I (or can I) SELECT DISTINCT on multiple columns?
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– Erwin Brandstetter
Sep 30 '12 at 20:45
1
isn't SELECT DISTINCT a,b,c FROM t precisely the same...
Validate uniqueness of multiple columns
... be patched?
– Alexey
Jul 16 '12 at 20:09
13
Alexey, validates_uniqueness_of [:user_id, :friend_i...
Android icon vs logo
...this is the case. Thanks!
– vol
Jul 20 '11 at 18:20
R.attr.logo is available since API Level 11, so android:logo too. ...
How to change the decimal separator of DecimalFormat from comma to dot/point?
...or me .
– Aakanksha
Jul 3 '15 at 15:20
2
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Check if list contains any of another list
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201
You could use a nested Any() for this check which is available on any Enumerable:
bool hasMat...
How to create a CPU spike with a bash command
... sha1sum . Thx~!
– AAI
Apr 3 '18 at 20:37
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Difference between val() and text()
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edited Mar 23 '13 at 19:20
JJJ
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How do you launch the JavaScript debugger in Google Chrome?
... mplungjan
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answered Sep 15 '08 at 20:08
John SheehanJohn Sheehan
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How to copy from current position to the end of line in vi
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Mike Lyons
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answered Oct 14 '11 at 7:09
Don RebaDon Reba
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