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What is a “callable”?
...ursively but don't, for fear of endless
recursion if some joker sets self.__call__ = self */
Py_DECREF(call);
return 1;
}
else {
return x->ob_type->tp_call != NULL;
}
}
It says:
If an object is an instance of some class then it is callable iff...
Postgresql: password authentication failed for user “postgres”
...
If I remember correctly the user postgres has no DB password set on Ubuntu by default. That means, that you can login to that account only by using the postgres OS user account.
Assuming, that you have root access on the box you can do:
sudo -u postgres psql
If that fails with a da...
What is the strict aliasing rule?
...r casting you can easily violate strict aliasing rules.
So in this kind of setup, if I want to send a message to something I'd have to have two incompatible pointers pointing to the same chunk of memory. I might then naively code something like this:
typedef struct Msg
{
unsigned int a;
unsi...
Python: Check if one dictionary is a subset of another larger dictionary
...
Convert to item pairs and check for containment.
all(item in superset.items() for item in subset.items())
Optimization is left as an exercise for the reader.
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CSS How to set div height 100% minus nPx
...der. The header is about 60 px. This is fixed. So my question is: how do I set the height my wrapper div to be 100% minus the 60 px?
...
Why should I learn Lisp? [closed]
...(or C#, or whatever you like) is a manifestation of the Turing model. You set your program in concrete, once and for all. Then you hope you can deal with all data that gets thrown on it.
Lisp maintains the Von Neuman model; there is no sharp, pre-determined border between code and data. Programm...
Cutting the videos based on start and end time using ffmpeg
...hat way ffmpeg will skip directly to the location. However, that will also set the time "zero" to that location, meaning that -to will point to the wrong time. Source: trac.ffmpeg.org/wiki/Seeking
– Denilson Sá Maia
Jul 30 '15 at 19:41
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Why is jquery's .ajax() method not sending my session cookie?
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It's also worth noting that cookies can be set to a specific path so if you cookie was set with path=/something and you are requesting the page /another then the cookie will not be sent. When you request the page /something the cookie will be sent as expected. So chec...
Different names of JSON property during serialization and deserialization
...getR() {
return red;
}
@JsonProperty("red")
public void setRed(byte red) {
this.red = red;
}
}
The idea is that method names should be different, so jackson parses it as different fields, not as one field.
Here is test code:
Coordinates c = new Coordinates();
c.setRe...
Update a dataframe in pandas while iterating row by row
...
You can assign values in the loop using df.set_value:
for i, row in df.iterrows():
ifor_val = something
if <condition>:
ifor_val = something_else
df.set_value(i,'ifor',ifor_val)
If you don't need the row values you could simply iterate ove...