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What are good uses for Python3's “Function Annotations”
... mm
and an example of use:
from mm import multimethod
@multimethod
def foo(a: int):
return "an int"
@multimethod
def foo(a: int, b: str):
return "an int and a string"
if __name__ == '__main__':
print("foo(1,'a') = {}".format(foo(1,'a')))
print("foo(7) = {}".format(foo(7)))
Th...
Convert string to Python class object?
...s eval() on untrusted strings?)
This seems simplest.
>>> class Foo(object):
... pass
...
>>> eval("Foo")
<class '__main__.Foo'>
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Which is better, return value or out parameter?
..., it stops the caller from having to declare the variable separately:
int foo;
GetValue(out foo);
vs
int foo = GetValue();
Out values also prevent method chaining like this:
Console.WriteLine(GetValue().ToString("g"));
(Indeed, that's one of the problems with property setters as well, and i...
Named regular expression group “(?Pregexp)”: what does “P” stand for?
... which all begin with (?P .
Currently there are two of them:
(?P<foo>...) Similar to regular grouping parentheses, but the text
matched by the group is accessible after the match has been performed,
via the symbolic group name "foo".
(?P=foo) Matches the same string as that mat...
Which comment style should I use in batch files?
...re expanded. Suppose you have (wrongly) set TARGET=C:\Program Files (x86)\"foo.exe", and inside a DO(..) expression you have :: echo %TARGET% you will get an error because the (x86) gets expanded before the whole expression gets evaluated, leading to an invalid DO(..) expression and very inexplicabl...
Is there a built in function for string natural sort?
...he str/int splits must line up, otherwise you'll create comparisons like ["foo",0] < [0,"foo"] for the input ["foo0","0foo"], which raises a TypeError.
– user19087
Jan 11 '17 at 0:25
...
typedef fixed length array
...he compiler did not complain about it. But when I defined a function void foo(type24 val) {} in my C file, it did complain. I would like to be able to define functions like type24_to_int32(type24 val) instead of type24_to_int32(char value[3]) .
...
Private and protected constructor in Scala
...e keyword between the class name and the parameter list, like this:
class Foo private () {
/* class body goes here... */
}
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...
`levels
...eadability reasons, I would say it never makes sense because `levels<-`(foo,bar) is the same as levels(foo) <- bar. Using @Marek's example: `levels<-`(as.factor(foo),bar) is the same as foo <- as.factor(foo); levels(foo) <- bar.
– Joshua Ulrich
...
“simple” vs “current” push.default in git for decentralized workflow
...n if a branch with the same name exists on the remote):
$ git checkout -b foo
Switched to a new branch 'foo'
$ git config push.default simple
$ git push
fatal: The current branch foo has no upstream branch.
To push the current branch and set the remote as upstream, use
git push --set-upstream...