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Mongodb Explain for Aggregation framework
...gate(
[ ...your pipeline...],
{ explain: true }
)
Thanks to Rafa, I know that it was possible to do even in 2.4, but only through runCommand(). But now you can use aggregate as well.
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i...
Gson custom seralizer for one variable (of many) in an object using TypeAdapter
... of serializers and adapters use the exact same code.
However, I will acknowledge that Jesse's approach looks better if you're frequently going to modify fields in your Java object. It's a trade-off of ease-of-use vs flexibility, take your pick.
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Should one call .close() on HttpServletResponse.getOutputStream()/.getWriter()?
...ice. It will save you a lot of pain. I wouldn't flush() either unless you know why you're doing it -- you should let the container handle buffering.
– Hal50000
Oct 2 '14 at 22:11
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Override valueof() and toString() in Java enum
...h is the possibility for silent error with no indication or recovery. Also now the "name" value and the symbolic value in code (e.g. A, B) are different. +2 for being clever. -200 for being terribly clever. There is no way I would ever approve this an a code review.
– pedorro...
dplyr summarise: Equivalent of “.drop=FALSE” to keep groups with zero length in output
... 0
# Turn group2 into a factor
iris$group2 = factor(iris$group2)
# Now all possible combinations of Species and group2 are included in the output,
# whether present in the data or not
iris %>% group_by(Species, group2, .drop=FALSE) %>% tally
#> Species group2 n
#> ...
Differences between Agda and Idris
...l back end for Agda which uses the same back end as Idris, via C. I don't know how well maintained it is. A primary goal of Idris will always be to generate efficient code - we can do a lot better than we currently do, but we're working on it.
The type systems in Agda and Idris are pretty similar i...
How to create the branch from specific commit in different branch
...type in a new branch name there click Create branch xxx as shown below.
Now you can fetch the changes from that branch locally and continue from there.
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Java Pass Method as Parameter
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In Java 8, you can now pass a method more easily using Lambda Expressions and Method References. First, some background: a functional interface is an interface that has one and only one abstract method, although it can contain any number of def...
map vs. hash_map in C++
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An unordered_map should give slightly better performance for accessing known elements of the collection, but a map will have additional useful characteristics (e.g. it is stored in sorted order, which allows traversal from start to finish). unordered_map will be faster on insert and delete than ...
Can you do this HTML layout without using tables?
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Neither amazon, now stackoverflow are pinnacles of web design.
– Bobby Jack
Feb 9 '09 at 0:44
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