I'd like to get the names of all the keys in a MongoDB collection. 21 Answers 21 ...

... the same way. – Stefan L Sep 22 at 11:50 Update: A small hello-world type spring non-boot application based on annota...

... answered Oct 7 '11 at 22:56 Rob CowieRob Cowie 20.4k55 gold badges5757 silver badges5656 bronze badges ...

... Community♦ 111 silver badge answered Feb 12 '13 at 16:10 Bryan RobertsBryan Roberts 3,242...

...the name of your function correctly? Names are case sensitive. Did you install the package that contains the function? install.packages("thePackage") (this only needs to be done once) Did you attach that package to the workspace ? require(thePackage) or library(thePackage) (this should be done ever...

... Josh 94511 gold badge1313 silver badges2121 bronze badges answered May 12 '16 at 20:30 Filipe SpindolaFilipe ...

... Community♦ 111 silver badge answered Nov 20 '11 at 8:14 grcgrc 18.9k44 gold badges3333 si...

...l valid. You'll adapt the function you use depending on your needs. Basically: if you already load all entries, say User.all, then you should use length to avoid another db query if you haven't anything loaded, use count to make a count query on your db if you don't want to bother with these con...

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... navinsnavins 2,95511 gold badge2424 silver badges2727 bronze badges add a comme...