"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 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?
mongoose aggregate using $exists in $cond - Stack Overflow
Jan 9, 2017 · I want to $project if a field exists, but not it's value, using mongoose model aggregate query. If it was possible using $exists in $cond, it would have looked ...
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, 1 month ago Modified 10 years, 1 month ago Viewed 21k times
Function with `cond` and `and` in Racket - Stack Overflow
May 13, 2020 · 3 First, cond and and are not functions, they are "special forms" (implemented as macros). The syntax of a cond expression is different from the syntax of a function call. The …
Is there an elseif thing in MongoDB to $cond while aggregating
Dec 15, 2014 · As an if..then.else operator $cond is indeed a ternary operator, just as would be implemented in many programming languages. This means as an "inline" conditional, rather …
conditional statements - I want to execute a JCL step no matter …
Aug 10, 2017 · COND is fairly counter-intuitive. The description is: If none of these tests is satisfied, the system executes the job step; if any test is satisfied, the system skips the job …
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 …
MongoDB conditional if else if with exists - Stack Overflow
Feb 21, 2022 · if user id exists then user id else if user name exists then user name else if user email exists then user email else '' Here, is my code.