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What's the “big idea” behind compojure routes?
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Compojure explained (to some degree)
NB. I am working with Compojure 0.4.1 (here's the 0.4.1 release commit on GitHub).
Why?
At the very top of compojure/core.clj, there's this helpful summary of Compojure's purpose:
A concise syntax for generating Ring handlers.
On a superficial level, ...
Linq to Entities join vs groupjoin
... parents as Id values in a fixed order. Let's use:
var ids = new[] { 3,7,2,4 };
Now the selected parents must be filtered from the parents list in this exact order.
If we do ...
var result = parents.Where(p => ids.Contains(p.Id));
... the order of parents will determine the result. If the paren...
What are the big improvements between guava and apache equivalent libraries?
...ally mature library, but it's also almost 10 years old, and targets Java 1.4. Guava was open sourced in 2007, targets Java 5, and thus Guava greatly benefits from the Java 5 features: generics, varargs, enums, and autoboxing.
According to the Guava developers, generics are one reason they chose to ...
Why is String.chars() a stream of ints in Java 8?
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answered Mar 16 '14 at 12:09
skiwiskiwi
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Do you have to put Task.Run in a method to make it async?
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Stephen ClearyStephen Cleary
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How to determine the longest increasing subsequence using dynamic programming?
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407
OK, I will describe first the simplest solution which is O(N^2), where N is the size of the co...
How to drop columns by name in a data frame
... function. For example :
R> df <- data.frame(x=1:5, y=2:6, z=3:7, u=4:8)
R> df
x y z u
1 1 2 3 4
2 2 3 4 5
3 3 4 5 6
4 4 5 6 7
5 5 6 7 8
Then you can use the which function and the - operator in column indexation :
R> df[ , -which(names(df) %in% c("z","u"))]
x y
1 1 2
2 2 3
3 3 4...
Why should we include ttf, eot, woff, svg,… in a font-face
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438
Answer in 2019:
Only use WOFF2, or if you need legacy support, WOFF. Do not use any other for...
In which case do you use the JPA @JoinTable annotation?
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EDIT 2017-04-29: As pointed to by some of the commenters, the JoinTable example does not need the mappedBy annotation attribute. In fact, recent versions of Hibernate refuse to start up by printing the following error:
org.hibernate.An...
Tying in to Django Admin's Model History
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Van GaleVan Gale
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