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Difference between exit() and sys.exit() in Python
...raising SystemExit. sys.exit does so in sysmodule.c:
static PyObject *
sys_exit(PyObject *self, PyObject *args)
{
PyObject *exit_code = 0;
if (!PyArg_UnpackTuple(args, "exit", 0, 1, &exit_code))
return NULL;
/* Raise SystemExit so callers may catch it or clean up. */
PyE...
How many concurrent AJAX (XmlHttpRequest) requests are allowed in popular browsers?
...urrent requests in the registry. Here's how to set it to four each.
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"MaxConnectionsPerServer"=dword:00000004
"MaxConnectionsPer1_0Server"=dword:00000004
...
Node.js Best Practice Exception Handling
...s depending on our code architecture:
For synchronous code, if an error happens, return the error:
// Define divider as a syncrhonous function
var divideSync = function(x,y) {
// if error condition?
if ( y === 0 ) {
// "throw" the error safely by returning it
return new Er...
Graphical DIFF programs for linux [closed]
... +1 for Meld - really slick. Definitely one of the more readable GUI diff apps that I've used.
– btongeorge
Feb 6 '13 at 12:10
1
...
Replace all non Alpha Numeric characters, New Lines, and multiple White Space with one Space
... \W leaves the underscore. A short equivalent for [^a-zA-Z0-9] would be [\W_]
text.replace(/[\W_]+/g," ");
\W is the negation of shorthand \w for [A-Za-z0-9_] word characters (including the underscore)
Example at regex101.com
...
Android: Go back to previous activity
I want to do something simple on android app.
How is it possible to go back to a previous activity.
23 Answers
...
Method Resolution Order (MRO) in new-style classes?
...gt; D.x
'c'
>>>
here, new-style, the order is:
>>> D.__mro__
(<class '__main__.D'>, <class '__main__.B'>, <class '__main__.C'>,
<class '__main__.A'>, <type 'object'>)
with A forced to come in resolution order only once and after all of its s...
How to clear the interpreter console?
...s file in your python search path:
# wiper.py
class Wipe(object):
def __repr__(self):
return '\n'*1000
wipe = Wipe()
Then you can do this from the interpreter all you like :)
>>> from wiper import wipe
>>> wipe
>>> wipe
>>> wipe
...
How to make inline functions in C#
...omitted a lot of class setup stuff)
This is the Main function:
IL_001f: stloc.0
IL_0020: ldstr "P1 = {0}"
IL_0025: ldloc.0
IL_0026: ldc.i4.5
IL_0027: callvirt instance !1 class [mscorlib]System.Func`2<int32, int32>::Invoke(!0)
IL_002c: box [msc...
How to assign colors to categorical variables in ggplot2 that have stable mapping?
...er.pal(5,"Set1")
names(myColors) <- levels(dat$grp)
colScale <- scale_colour_manual(name = "grp",values = myColors)
and then add the color scale onto the plot as needed:
#One plot with all the data
p <- ggplot(dat,aes(x,y,colour = grp)) + geom_point()
p1 <- p + colScale
#A second plo...