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Traits vs. interfaces
I've been trying to study up on PHP lately, and I find myself getting hung up on traits. I understand the concept of horizontal code reuse and not wanting to necessarily inherit from an abstract class. What I don't understand is: What is the crucial difference between using traits versus interfaces?...
How to expire session due to inactivity in Django?
...lf.request.session['access_key'] = access_key
self.request.session['access_token'] = access_token
self.request.session.set_expiry(set_age) #in seconds
And when using the access_key and token,
try:
key = self.request.session['access_key']
except KeyError:
age = self.request.session.get_ex...
C dynamically growing array
...
} Array;
void initArray(Array *a, size_t initialSize) {
a->array = malloc(initialSize * sizeof(int));
a->used = 0;
a->size = initialSize;
}
void insertArray(Array *a, int element) {
// a->used is the number of used entries, because a->array[a->used++] updates a->used ...
What character encoding should I use for a HTTP header?
...enchant.
message-header = field-name ":" [ field-value ]
field-name = token
field-value = *( field-content | LWS )
So, we are after field-value.
LWS = [CRLF] 1*( SP | HT )
CRLF = CR LF
CR = <US-ASCII CR, carriage return (13)>
LF = <US-...
How should one use std::optional?
...nt(std::string s); //return nullptr if fail
This requires dynamic memory allocation, worrying about ownership, etc. - always prefer one of the other two signatures above.
Another example:
class Contact
{
std::optional<std::string> home_phone;
std::optional<std::string> work...
Depend on a branch or tag using a git URL in a package.json?
...
If it helps anyone, I tried everything above (https w/token mode) - and still nothing was working. I got no errors, but nothing would be installed in node_modules or package_lock.json. If I changed the token or any letter in the repo name or user name, etc. - I'd get an error. S...
Which is more efficient, a for-each loop, or an iterator?
...te a new Iterator when .iterator() is called, however they can be accessed allocation-free using the C-style loop. This can be important in certain high-performance environments where one is trying to avoid (a) hitting the allocator or (b) garbage collections.
– Dan
...
jQuery pass more parameters into callback
.../ an object / whatever extra params you wish to pass.
$.post("someurl.php", someData, doSomething(extraStuff), "json");
};
What is happening?
In the last line, doSomething(extraStuff) is invoked and the result of that invocation is a function pointer.
Because extraStuff is passed as an argu...
Java Stanford NLP: Part of Speech labels?
...
what about the punctuations? for instance, a ',' token gets the PoS ','. is there a list that includes these PoS?
– David Portabella
Jun 26 '17 at 15:24
...
Get the first element of an array
... a array "copy" is needed:
array_shift(array_slice($array, 0, 1));
With PHP 5.4+ (but might cause an index error if empty):
array_values($array)[0];
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