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Fastest way to list all primes below N
...or a,b in itertools.izip_longest(f1(num),f2(num))]):
sys.exit("Error: %s(%s) != %s(%s)"%(f1.func_name,num,f2.func_name,num))
n=1000000
test(sieveOfAtkin,sieveOfEratosthenes,n)
test(sieveOfAtkin,ambi_sieve,n)
test(sieveOfAtkin,ambi_sieve_plain,n)
test(sieveOfAtkin,su...
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 ...
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
...
What and where are the stack and heap?
... your programming language uses to allocate and free memory, and check for errors (if the allocation/freeing fails for any reason).
What determines the size of each of them?
Again, it depends on the language, compiler, operating system and architecture. A stack is usually pre-allocated, because by...
Difference between GIT and CVS
...ut inconveniencing other users. In particular if you notice typo (or other error) in commit message, or a bug in commit, you can simply use "git commit --amend". This is not possible (at least not without heavy hackery) in CVS.
More tools. Git offers much more tools than CVS. One of more important i...
RESTful Authentication
...d response. If you don't like it, just send a 403 Forbidden instead. The error page may include a method to login or a link to it. However, but biggest argument against cookies AND http authentication (regardless of whether the state is server side or client side) is that they are vulnerable to c...
lexers vs parsers
...lar transducers may have others uses, such as
formalization of some syntax error handling techniques.)
BNF is just a specific syntax for presenting CF grammars.
EBNF is a syntactic sugar for BNF, using the facilities of regular
notation to give terser version of BNF grammars. It can always be
tran...
What is the copy-and-swap idiom?
... swap(rhs);
return *this;
}
The fundamental idea is that:
the most error-prone part of assigning to an object is ensuring any resources the new state needs are acquired (e.g. memory, descriptors)
that acquisition can be attempted before modifying the current state of the object (i.e. *this) ...
Understanding __get__ and __set__ and Python descriptors
...
@IshanBhatt: I think that's because of the error pointed out by musiphil above. Also, not this is not my answer
– Eric
Mar 7 '16 at 14:52
add a...