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pass **kwargs argument to another function with **kwargs
... answer, the following is an example that'll show you the difference:
def foo(**kwargs):
for entry in kwargs.items():
print("Key: {}, value: {}".format(entry[0], entry[1]))
# call using normal keys:
foo(a=1, b=2, c=3)
# call using an unpacked dictionary:
foo(**{"a": 1, "b":2, "c":3})
...
Why is it impossible to build a compiler that can determine if a C++ function will change the value
...
@mrsoltys, quantum computers are "only" exponentially faster for some problems, they can not solve undecidable problems.
– zch
Jul 1 '13 at 18:52
8
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Groovy: what's the purpose of “def” in “def x = 0”?
...e bindings for the current script and groovy treats it (mostly) like a globally scoped variable:
x = 1
assert x == 1
assert this.binding.getVariable("x") == 1
Using the def keyword instead does not put the variable in the scripts bindings:
def y = 2
assert y == 2
try {
this.binding.getVari...
LAST_INSERT_ID() MySQL
...t get it working first as I was using asp.net with MySQL and needed to add Allow User Variables=True to the Connection String to allow variables.
– Martin
Oct 1 '10 at 10:19
117
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Can I read the hash portion of the URL on my server-side application (PHP, Ruby, Python, etc.)?
...ect to that other url in your other page. Not awesome, and doesnt work for all use cases of course, but does work for bookmarks. Note that if you do this, you shouldnt allow redirects to absolute urls, only relative urls, to ensure you don't open yourself up to unsafe redirects
...
Is there something like Annotation Inheritance in java?
...do with programs that read the annotations on a class without loading them all the way. See Why is it not possible to extend annotations in Java?
However, types do inherit the annotations of their superclass if those annotations are @Inherited.
Also, unless you need those methods to interact, you...
How can I exclude directories from grep -R?
I want to traverse all subdirectories, except the "node_modules" directory.
13 Answers
...
Connecting overloaded signals and slots in Qt 5
...tOverload and qNonConstOverload).
Usage example (from the docs):
struct Foo {
void overloadedFunction();
void overloadedFunction(int, QString);
};
// requires C++14
qOverload<>(&Foo:overloadedFunction)
qOverload<int, QString>(&Foo:overloadedFunction)
// same, with C+...
Encoding URL query parameters in Java
... URL or by Mr. Sindi in this thread.
URIUtil of Apache httpclient is really useful, although there are some alternatives
URIUtil.encodeQuery(url);
For example, it encodes space as "+" instead of "%20"
Both are perfectly valid in the right context. Although if you really preferred you cou...
Func vs. Action vs. Predicate [duplicate]
...cher.BeginInvoke.
Predicate is just a special cased Func<T, bool> really, introduced before all of the Func and most of the Action delegates came along. I suspect that if we'd already had Func and Action in their various guises, Predicate wouldn't have been introduced... although it does impa...