How to group query with multiple $cond? - Stack Overflow
Jun 2, 2017 · 35 I want to query like below, but this contains only one $cond. How to query with two $cond?
"cond","and" and "or" in Scheme - Stack Overflow
Oct 14, 2013 · You cannot define cond or and or or or if as functions because functions evaluate all their arguments. (You could define some of them as macros). Read also the famous SICP …
Use of $COND and $EQ with a array of objects - Stack Overflow
Mar 1, 2014 · 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 …
How to use $in or $nin in mongo aggregation $group $cond
Nov 16, 2015 · How to use $in or $nin in mongo aggregation $group $cond Asked 10 years, 2 months ago Modified 10 years, 2 months ago Viewed 21k times
What is the difference between if and cond? - Stack Overflow
Nov 15, 2020 · As of #2240 (merged 2 Mar 2022), if and cond are somewhat different from what they used to be, and are better distinguished from each other. if requires exactly three …
Why is cond a special form in Scheme, rather than a function?
Nov 2, 2015 · What makes cond a special form is that its arguments are evaluated lazily whereas functions in Scheme or Common Lisp evaluate their arguments eagerly.
How to use $cond operation in Spring-MongoDb aggregation …
2 I add the same issue and searched on Google and this was the first result I found so I'd like to add for future readers that this feature is now available since version 1.10 RC1 with the …
MongoDB $in inside $cond - Stack Overflow
Mar 16, 2019 · 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 …
Conditional grouping with $exists inside $cond - Stack Overflow
1 I found your questions while looking for a similar problem, but insted of a key, I was looking for my parameters. I finally solved the issue. This is what I used for my parameter, to check that if …
understanding of pthread_cond_wait() and pthread_cond_signal()
Jan 3, 2024 · But there is a saying "The pthread_cond_signal () function shall unblock at least one of the threads that are blocked on the specified condition variable cond (if any threads are …