"cond","and" and "or" in Scheme - Stack Overflow
2013年10月14日 · (cond ((check-something) (display 10)) (else (display 20))) With the procedure version of my-if both 10 and 20 would have been printed. This is how and and or is implemented as well.
MongoDB using $cond with Update ($inc) - Stack Overflow
2020年4月21日 · After spending some time and searching online, I figured that the update_many(), update_one(), and update() methods of Collection object in PyMongo do not accept type list as parameters to support the new Aggregation Pipeline feature of the Update operation in MongoDB 4.2+.
How to use $in or $nin in mongo aggregation $group $cond
2015年11月16日 · @SomnathMuluk I think you mean "3rd way" given the three approaches shown, and for the record just about all of my code doing something like this does it that way, as it's the logical approach.
MongoDB $in inside $cond - Stack Overflow
2019年3月16日 · I burned out my brain trying to group and count itens in MongoDB. There are lots of posts but no one is that i need. This is an exemple based on: styvane answer db.VIEW_HISTORICO.aggregate([ { ...
How to group query with multiple $cond? - Stack Overflow
2017年6月2日 · Ask questions, find answers and collaborate at work with Stack Overflow for Teams. Try Teams for free Explore Teams
Use of $COND and $EQ with a array of objects - Stack Overflow
2014年3月1日 · I'm hoping that someone might be able to answer whether what I'm trying to accomplish below can be done with the MongoDB Aggregation Framework. I have a user data structure that resembles the foll...
What is the difference between if and cond? - Stack Overflow
2020年11月15日 · cond takes any even number of arguments and doesn't require brackets or provide implicit dos: (cond condition1 then1 condition2 then2 condition3 then3) if* has been removed. Original answer. The square brackets in cond provide an implicit do. That's it. I typically use if only for two-branch cases and cond for everything else.
Check for value to be in an array in $cond - Stack Overflow
2021年3月3日 · Im trying to project a value in my aggregation pipeline based on if any array in an array contaibns a specific value. This is a simplified version of how the data looks: [ { "permissions...
MongoDB: Aggregation using $cond with $regex - Stack Overflow
2018年5月3日 · Perfect, thank you so much! I will test it as soon as I will have updated my mongodb version but it seems to be exactly what I was looking for:) Concerning your assumptions above, yes I am always retrieving all documents in the captions collection.
How to use $cond in mongoDB without an else expression?
2019年3月15日 · Ask questions, find answers and collaborate at work with Stack Overflow for Teams. Try Teams for free Explore Teams