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Is quitting an application frowned upon?
...nt Task (rather than being created in its own Task). If the Camera has an error and it crashes, should that result in the whole app crashing? From the standpoint of the user, only the Camera failed, and they should be returned to their previous activity. So it just restarts the process with all t...
DDD - the rule that Entities can't access Repositories directly
...ical for implementation.
Quoting:
"The single model reduces the chances of error, because the design is now a direct outgrowth of the carefully considered model. The design, and even the code itself, has the communicativeness of a model."
The way I'm interpreting this, if you ended up with more line...
How would you implement an LRU cache in Java?
...es the limit size more of a suggestion/rough guess within a fair amount of error depending on how well spread your keys hash algorithm is.
Here is the test to show that the concurrent version probably works. :) (Test under fire would be the real way).
public class SimpleConcurrentLRUCache {
...
SQL injection that gets around mysql_real_escape_string()
..._real_escape_string(), which now fails and produces an CR_INSECURE_API_ERR error if NO_BACKSLASH_ESCAPES is enabled.
References: See also Bug #19211994.
Safe Examples
Taken together with the bug explained by ircmaxell, the following examples are entirely safe (assuming that one is eith...
Why don't they teach these things in school? [closed]
...se it produces more reliable code? Better performing code? Reduces human error? Or is it because it is easier to grade papers/programs giving them more time to do research? Is it because they dont know how to program and they are just following someone elses book on the subject? Did they teach ...
Scala 2.8 breakOut
..., "BB", "CCC").map(s => (s, s.length))
The compiler would complain:
error: type mismatch;
found : Seq[(String, Int)]
required: Map[String,Int]
The reason being that Seq only knows how to build another Seq (i.e. there is an implicit CanBuildFrom[Seq[_], B, Seq[B]] builder factory available...
What is the combinatory logic equivalent of intuitionistic type theory?
...(Show, Functor)
infixl 4 :$
data Ze
magic :: Ze -> a
magic x = x `seq` error "Tragic!"
data Su a = Ze | Su a deriving (Show, Functor, Eq)
I use a de Bruijn index representation in the Bellegarde and Hook manner (as popularised by Bird and Paterson). The type Su a has one more element than a, ...
How to profile a bash shell script slow startup?
... -c -f ./script.sh
From the manual:
-c Count time, calls, and errors for each system call and report a summary on program exit.
-f Trace child processes ...
This is not exactly what you want and what a line-oriented profiler would show to you but it usually helps to find hot ...
What is the purpose of the reader monad?
...Closure = (Term, Env)
When we are done, we should get out a value (or an error):
data Value = Lam String Closure | Failure String
So, let's write the interpreter:
interp' :: Term -> Reader Env Value
--when we have a lambda term, we can just return it
interp' (Lambda nv t)
= do env <-...
What's the difference between a continuation and a callback?
...
Apologies if I have made any errors in the JavaScript examples. Writing this answer has roughly doubled the total amount of JavaScript I've written.
– cpcallen
Oct 24 '16 at 22:28
...