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What are metaclasses in Python?
...reate an object by calling the class, Python creates a new class (when it executes the 'class' statement) by calling the metaclass. Combined with the normal __init__ and __new__ methods, metaclasses therefore allow you to do 'extra things' when creating a class, like registering the new class with s...
Java 8 Streams: multiple filters vs. complex condition
...
The code that has to be executed for both alternatives is so similar that you can’t predict a result reliably. The underlying object structure might differ but that’s no challenge to the hotspot optimizer. So it depends on other surrounding condi...
What is the fastest integer division supporting division by zero no matter what the result is?
...s I got rid of the branch on my Pentium and gcc compiler using
int f (int x, int y)
{
y += y == 0;
return x/y;
}
The compiler basically recognizes that it can use a condition flag of the test in the addition.
As per request the assembly:
.globl f
.type f, @function
f:
...
How do you validate a URL with a regular expression in Python?
... to parse (and validate) URL's is the urlparse (py2, py3) module.
A regex is too much work.
There's no "validate" method because almost anything is a valid URL. There are some punctuation rules for splitting it up. Absent any punctuation, you still have a valid URL.
Check the RFC carefully ...
Call Go functions from C
...nnecessary bits. It should make things a little clearer.
package foo
// extern int goCallbackHandler(int, int);
//
// static int doAdd(int a, int b) {
// return goCallbackHandler(a, b);
// }
import "C"
//export goCallbackHandler
func goCallbackHandler(a, b C.int) C.int {
return a + b
}
/...
How comment a JSP expression?
How can I comment a JSP expression like: <%= map.size() %>
7 Answers
7
...
Tomcat VS Jetty [closed]
... This does not look very true for me, Tomcat also runs out of box.
– Audrius Meskauskas
Feb 9 '13 at 19:26
...
Adding the “Clear” Button to an iPhone UITextField
How do you add that little "X" button on the right side of a UITextField that clears the text? I can't find an attribute for adding this sub-control in Interface Builder in the iPhone OS 2.2 SDK.
...
How to modify the keyboard shortcuts in Eclipse IDE?
...ly annoyed that in order to run an ant script I have to use Alt + Shift + x , q . But I think If I had this power I would many things I would change the shortcuts for/add shortcuts for things that don't currently have them.
...
What is the pythonic way to unpack tuples? [duplicate]
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Generally, you can use the func(*tuple) syntax. You can even pass a part of the tuple, which seems like what you're trying to do here:
t = (2010, 10, 2, 11, 4, 0, 2, 41, 0)
dt = datetime.datetime(*t[0:7])
This is called unpacking a tuple, and can be used for other it...