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Why do we need extern “C”{ #include } in C++?
...
123
C and C++ are superficially similar, but each compiles into a very different set of code. When...
How to format a java.sql Timestamp for displaying?
...ERMAN);
Timestamp oldfashionedTimestamp = new Timestamp(1_567_890_123_456L);
ZonedDateTime dateTime = oldfashionedTimestamp.toInstant()
.atZone(ZoneId.systemDefault());
String desiredFormat = dateTime.format(formatter);
System.out.println(desiredFormat);
O...
Check whether a path is valid in Python without creating a file at the path's target
...es:
Under Windows, instances of WindowsError whose winerror attribute is 123 (i.e., ERROR_INVALID_NAME).
Under all other OSes:
For pathnames containing null bytes (i.e., '\x00'), instances of TypeError.
For pathnames containing path components longer than 255 bytes, instances of OSError whose errc...
How do I initialize the base (super) class?
...):
pass
class Y(X):
def __init__(self):
super(Y, self).__init__(123)
def doit(self, foo):
return super(Y, self).doit(foo)
Because python knows about old- and new-style classes, there are different ways to invoke a base method, which is why you've found multiple ways of doing so.
...
What is the most “pythonic” way to iterate over a list in chunks?
... edited Aug 31 at 15:07
Seanny123
5,70277 gold badges4949 silver badges100100 bronze badges
answered Jan 12 '09 at 3:10
...
How do I show the value of a #define at compile-time?
...tring should be treated as if it were quoted. If it did then:
#define ABC 123
int n = ABC;
would not compile.
Now consider:
#define ABC abc
#pragma message "The value of ABC is: " ABC
which is equivalent to
#pragma message "The value of ABC is: " abc
This causes a preprocessor warning beca...
Decimal number regular expression, where digit after decimal is optional
...pace & comments in regular expression)
For example, it will match:
123
23.45
34.
.45
-123
-273.15
-42.
-.45
+516
+9.8
+2.
+.5
And will reject these non-numbers:
. (single decimal point)
-. (negative decimal point)
+. (plus decimal point)
(empty string)
The simpler solutions can incorre...
How to extract a floating number from a string [duplicate]
... [-+]? # optional sign
... (?:
... (?: \d* \. \d+ ) # .1 .12 .123 etc 9.1 etc 98.1 etc
... |
... (?: \d+ \.? ) # 1. 12. 123. etc 1 12 123 etc
... )
... # followed by optional exponent part if desired
... (?: [Ee] [+-]? \d+ ) ?
... """
>>> rx = re...
Regex, every non-alphanumeric character except white space or colon
...
Try this:
[^a-zA-Z0-9 :]
JavaScript example:
"!@#$%* ABC def:123".replace(/[^a-zA-Z0-9 :]/g, ".")
See a online example:
http://jsfiddle.net/vhMy8/
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...
Get Character value from KeyCode in JavaScript… then trim
...// [119]
"F9", // [120]
"F10", // [121]
"F11", // [122]
"F12", // [123]
"F13", // [124]
"F14", // [125]
"F15", // [126]
"F16", // [127]
"F17", // [128]
"F18", // [129]
"F19", // [130]
"F20", // [131]
"F21", // [132]
"F22", // [133]
"F23", // [134]
"F24", // [135]
""...