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How do I print the type of a variable in Rust?
...intln!("{}", std::any::type_name::<T>())
}
fn main() {
let s = "Hello";
let i = 42;
print_type_of(&s); // &str
print_type_of(&i); // i32
print_type_of(&main); // playground::main
print_type_of(&print_type_of::<i32>); // playground::print_type...
How to save an activity state using save instance state?
...how to save an application's state. So given this minor re-tooling of the 'Hello, Android' example:
33 Answers
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What is the meaning of “… …” token? i.e. double ellipsis operator on parameter pack
..._helper( args ) ... );
}
int main() {
wrap_printf( &std::printf, "Hello %s\n", std::string( "world!" ) );
wrap_printf( &std::fprintf, stderr, std::string( "Error %d" ), 5 );
}
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...
Good MapReduce examples [closed]
...read about mapreduce, the above scenario
isn't anything new... it's the "Hello, World" of mapreduce. So here is
a real world use case (Facebook may or may not actually do the
following, it's just an example):
Facebook has a list of friends (note that friends are a bi-directional
thing o...
What is object slicing?
...
Hello. Great answer but I have one question. If I do something like this ** dev d; base* b = &d;** The slicing also takes place?
– Adrian
Jul 10 '18 at 6:58
...
How can I use threading in Python?
...iprocessing:
from multiprocessing import Process
def f(name):
print 'hello', name
if __name__ == '__main__':
p = Process(target=f, args=('bob',))
p.start()
p.join()
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impro...
What is Gradle in Android Studio?
...de you saw in these files is Groovy code. If you write System.out.println("Hello Gradle!"); then it will print on your console.
What can you do in a build script?
A simple example is that you have to copy some files from one directory to another before the actual build process happens. A Gradle bu...
SignalR: Why choose Hub vs. Persistent Connection?
...new {
method: "addNewMessageToPage",
name: "Albert",
message: "Hello"
});
And on the client, instead of simply defining
yourHub.client.addNewMessageToPage = function(name, message) {
// things and stuff
};
you'd have to add a callback to handle all incoming messages:
function...
How do you make a HTTP request with C++?
...
Hello, I just came across this post here, looking for easier C++ HTTP requests than the plain way. However, I am not really experienced with libraries, and I don't really know how to include this in my visual studio C++ proje...
Color in git-log
... disables colors when the output is not used for a terminal1
%C(auto,blue)Hello%C(auto,reset)
Note: git 2.4+ (Q2 2015) will do a better job of resetting color around branch names.
See commit 5ee8758 by Junio C Hamano (gitster):
log --decorate: do not leak "commit" color into the next item
...