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Pass all variables from one shell script to another?
...re complex data which you could not express as an environment variable (at least without some heavy lifting on your part), like arrays or associative arrays.
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PHP $_SERVER['HTTP_HOST'] vs. $_SERVER['SERVER_NAME'], am I understanding the man pages correctly?
...TP_HOST'] == 'localhost:8080'
$_SERVER['SERVER_NAME'] == 'localhost'
(At least that's what I've noticed in Apache port-based virtualhosts)
As Mike has noted below, HTTP_HOST does not contain :443 when running on HTTPS (unless you're running on a non-standard port, which I haven't tested).
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django admin - add custom form fields that are not part of the model
... from the extra field, it did not show how to save it back to the model at least in Django 2.1.1
This takes the value from an unbound custom field, processes, and saves it into my real description field:
class WidgetForm(forms.ModelForm):
extra_field = forms.CharField(required=False)
def ...
Why is iostream::eof inside a loop condition (i.e. `while (!stream.eof())`) considered wrong?
... not the failbit. So, in.fail() works as expected, as long as there is at least one data to read. If all-blank streams are also acceptable, then the correct form is:
while( !(in>>ws).eof() )
{
int data;
in >> data;
if ( in.fail() ) /* handle with break or throw */;
/* ...
When to use nested classes and classes nested in modules?
...rapping/outer "class" then i would make it a Class instead of a Module. At least this makes sense to me.
– FireDragon
Dec 27 '18 at 23:44
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Are there benefits of passing by pointer over passing by reference in C++?
...d like that since you cannot take the address of a temporary.
Last but not least, references are easier to use -> less chance for bugs.
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Why do we need a pure virtual destructor in C++?
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All you need for an abstract class is at least one pure virtual function. Any function will do; but as it happens, the destructor is something that any class will have—so it's always there as a candidate. Furthermore, making the destructor pure virtual (as opposed...
How to search a specific value in all tables (PostgreSQL)?
...hat can be used in search. This way it decrease the time of processing. At least in my test it reduced a lot.
CREATE OR REPLACE FUNCTION search_columns(
needle text,
haystack_columns name[] default '{}',
haystack_tables name[] default '{}',
haystack_schema name[] default '{public}'
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Differences between Ant and Maven [closed]
...Ant is a set of car parts. With Ant you have to build your own car, but at least if you need to do any off-road driving you can build the right type of car.
To put it another way, Maven is a framework whereas Ant is a toolbox. If you're content with working within the bounds of the framework then M...
Why do I need Transaction in Hibernate for read-only operations?
...affirmation that read only transactions have great performance benefit. At least, it doesn't seem to be the case in the context of hibernate.
– nimai
May 15 at 21:40
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