"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 and Lisp In …
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?
Use of $COND and $EQ with a array of objects - Stack Overflow
Mar 1, 2014 · Use of $COND and $EQ with a array of objects Asked 11 years, 10 months ago Modified 3 years, 1 month ago Viewed 18k times
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, 2 months ago Modified 10 years, 1 month ago Viewed 21k times
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.
MongoDB - Is it possible to use $or with $cond? - Stack Overflow
To answer your original question, yes you can use $or within a $cond. However, in your case this would be semantically incorrect as you are looking for a range between dates.
Unable to activate environment conda - Stack Overflow
Jan 29, 2024 · Running Bash in Cmder on Windows 10. I am trying to activate a new virtual environment but keep getting told to run 'conda init' before 'conda activate'. I've tried running conda init but I keep …
$cond dentro de un $sum - Stack Overflow en español
quiero hacer una consulta compuesta en mongodb, la cual debe sumar 1 por cada true que detecte, pero no me esta funcionando de manera correcta, ya que me cuenta tanto los true como los false { …
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 it exists …