namespaces

问题 I have two source files, a.cpp and b.cpp . In a.cpp , I have a function, foo : namespace ns { void foo() { std::cout << "foo!"; } } In b.cpp , I have another function in namespace ns in which I'd like to prototype and call foo : namespace ns { void bar() { void foo(); foo(); } } While the above is syntactically valid, it leads the compiler to think that foo is in the global namespace (or at least that's what I've deduced from the linker errors I get when I do this). My first two ideas to fix

问题 I've read this thread, but it seems like there are no load and load-file in ClojureScript. Is it possible to separate a single namespace over multiple files? The reason I want to do that is because I'm using Om and I want to separate components into different files. I can do it using separate namespaces, but then I will have to write the same requires in the beginning of each file and also the only way to call those components in the main file is like that: (:require [some-project.sidebar :as

问题 this question is somewhat a follow up on this question. Consider the following example set.seed(1) x <- cumsum(rnorm(10)) y <- stats::arima(x, order = c(1, 0, 0)) length(stats::fitted(y)) [1] 0 So far so good: zero is returned because R does not now how to use stats::fitted on an object of class Arima . Next in my code, I need one function from the forecast package. I do not attach the package, I just load it using the :: notation. In my code below I will load it directly using

问题 The following code can be fixed easily, but quite annoying. #include <functional> #include <boost/bind.hpp> void foo() { using namespace std::placeholders; std::bind(_1, _2, _3); // ambiguous } There's a macro BOOST_BIND_NO_PLACEHOLDERS , but using this macro will also bring some drawbacks like causing boost::placeholders disappear from the compile unit included <boost/bind.hpp> but not included <boost/bind/placeholders.hpp> . The name conflicts also comes with other libs like boost::mpl , I

问题 The following code can be fixed easily, but quite annoying. #include <functional> #include <boost/bind.hpp> void foo() { using namespace std::placeholders; std::bind(_1, _2, _3); // ambiguous } There's a macro BOOST_BIND_NO_PLACEHOLDERS , but using this macro will also bring some drawbacks like causing boost::placeholders disappear from the compile unit included <boost/bind.hpp> but not included <boost/bind/placeholders.hpp> . The name conflicts also comes with other libs like boost::mpl , I

问题 I want to use redis to store some of my own key-value pairs, however some of my modules already use it. The redis express session store for session data, as well as the redis adapter for socket io. So my question is simple, how can I create or designate a database/namespace to store my own keys without key collisions? I am using the node-redis driver. 回答1: Solution 1: Store data of different modules in different Redis instances The most strictly isolation is storing data of each module in an

问题 I have a source xml like following: <SampleRequest xmlns="http://sample.com/s" xmlns:s1="http://sample.com/s1" xmlns:s2="http://sample.com/s2" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://sample.com/s schema.xsd"> <data> <s1:customer s1:firstName="Jim" s1:lastName="Ellison"/> <s2:address> 123 test street </s2:address> </data> </SampleRequest> I need to transform it to the following <SampleRequest xmlns="http://sample.com/t" xmlns:t1="http://sample.com/t1"

问题 I have a source xml like following: <SampleRequest xmlns="http://sample.com/s" xmlns:s1="http://sample.com/s1" xmlns:s2="http://sample.com/s2" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://sample.com/s schema.xsd"> <data> <s1:customer s1:firstName="Jim" s1:lastName="Ellison"/> <s2:address> 123 test street </s2:address> </data> </SampleRequest> I need to transform it to the following <SampleRequest xmlns="http://sample.com/t" xmlns:t1="http://sample.com/t1"

问题 I know that its bad form to use import * in python, and I don't plan to make a habit of it. However I recently came across some curious behaviour that I don't understand, and wondered if someone could explain it to me. Lets say I have three python scripts. The first, first_script.py , comprises: MESSAGE = 'this is from the first script' def print_message(): print MESSAGE if __name__ == '__main__': print_message() Obviously running this script gives me the contents of MESSAGE. I have a second

问题 I know that its bad form to use import * in python, and I don't plan to make a habit of it. However I recently came across some curious behaviour that I don't understand, and wondered if someone could explain it to me. Lets say I have three python scripts. The first, first_script.py , comprises: MESSAGE = 'this is from the first script' def print_message(): print MESSAGE if __name__ == '__main__': print_message() Obviously running this script gives me the contents of MESSAGE. I have a second