我的输入如下:
Rcpp::NumericMatrix data(dataMatrix);
Rcpp::NumericVector xSize(dataXsize);
Rcpp::NumericVector ySize(dataYsize);
Rcpp::NumericVector tIndexes(testIndexes);
Rcpp::NumericVector cIndexes(controlIndexes);
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我试图调用的外部库有这个签名
WilcoxonTest(float * _data, int _dataXsize, int _dataYsize, vector<int> * _testIndexes, vector<int> * _controlIndexes);
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如何将Rcpp数据类型转换为C++标准数据类型?
注意:
float * _data
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是浮点值的矩阵.该库假定它是这样的:
float * _data = new float[dataXsize * dataYsize];
Run Code Online (Sandbox Code Playgroud) 这是我的Ajax代码:
var myJSONObject = {"bindings": [
{"ircEvent": "PRIVMSG", "method": "newURI", "regex": "^http://.*"}]
};
$.ajax({
url : "ships",
data : myJSONObject,
success : function(data){
GLOBAL.player.startShooting(data);
},
error : function(data) {
console.log("error:", data);
},
dataType : "json",
timeout : 30000,
type : "post"
});
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这是我的Java Servlet代码:
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
System.out.println("im in PSOT");
System.out.println(request.getParameter("myJSONObject"));
StringBuilder sb = new StringBuilder();
BufferedReader br = request.getReader();
String str;
while( (str = br.readLine()) != null ){
sb.append(str);
}
System.out.println(sb.toString());
response.setContentType("application/json"); …Run Code Online (Sandbox Code Playgroud) 我试图在我的 C++ 项目中使用 netCDF 库,但由于某种原因我不能使用它。
这是我的make文件
NETCDF = -L/usr/lib -lnetcdf_c++
WILXAPP = -Lsrc src/wilxtest.cpp -o bin/Debug/WilxAstakTest
Debug:
g++ -Wall -ggdb $(NETCDF) $(WILXAPP)
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在我的 cpp 文件中,我基本上有(删除了膨胀)
#include <iostream>
#include <netcdfcpp.h>
int main(int argc, char* argv[])
{
NcFile dataFile("simple_xy.nc", NcFile::Replace);
}
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我明白了:
undefined reference to `NcFile::NcFile(char const*, NcFile::FileMode, unsigned long*, unsigned long, NcFile::FileFormat)'|
Run Code Online (Sandbox Code Playgroud) 我无法解析我从javascript获得的JSON.JSON的格式是这样的:
[{"positions":[{"x":50,"y":50},{"x":82,"y":50},{"x":114,"y":50},{"x":146,"y":50}]},{"positions":[{"x":210,"y":50},{"x":242,"y":50},{"x":274,"y":50}]}]
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到目前为止,我已经能够做到这一点:
{"positions":[{"x":50,"y":50},{"x":82,"y":50},{"x":114,"y":50},{"x":146,"y":50}]}
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但我现在还需要创建一个具有这些职位的课程.我一直在上课,因为我先尝试打印输出,但我无法进一步分解.我收到此错误消息:
java.lang.IllegalStateException:这不是JSON数组.
我的代码是这样的:
JsonParser parser = new JsonParser();
String ships = request.getParameter("JSONships");
JsonArray array = parser.parse(ships).getAsJsonArray();
System.out.println(array.get(0).toString());
JsonArray array2 = parser.parse(array.get(0).toString()).getAsJsonArray();
System.out.println(array2.get(0).toString());
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我也试过这样做:
Gson gson = new Gson() ;
String lol = (gson.fromJson(array.get(0), String.class));
System.out.println(lol);
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在这种情况下,我得到:
com.google.gson.JsonSyntaxException:java.lang.IllegalStateException:预期的STRING但是BEGIN_OBJECT
最后,我想循环遍历位置,为每个"位置"创建类,其中包含具有另一个类Position的List,其具有int x,y.
感谢您的时间.
我试图在辅助模块上编写一个rspec单元测试
我有SessionsController和SessionsHelper
里面SessionsHelper我有
def redirect_back_or(default)
redirect_to(session[:return_to] || default)
session.delete(:return_to)
end
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我想做一个看起来像这样的测试:
describe "redirect_back_or(default)" do
describe "with stored location" do
before do
helper.request.path = users_path
helper.store_location
end
it do
expect(helper.redirect_back_or(user_path(@user))).to redirect_to(users_url)
helper.session[:return_to].should eq(nil)
end
end
end
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但我在Helper方法中得到一个例外
undefined method `redirect_to' for #<#<Class:0x00000006fc9940>:0x00000005322620>
# ./app/helpers/sessions_helper.rb:34:in `redirect_back_or'
# ./spec/helpers/sessions_helper_spec.rb:99:in `block (4 levels) in <top (required)>'
Run Code Online (Sandbox Code Playgroud) 我有一个基本上看起来像这样的类(我删除了不必要的代码):
class WilxList {
private:
struct Test{
double number;
int sign;
int rank;
};
bool testSorter(const Test & x1, const Test & x2);
public:
WilxList(std::vector<double> &argNumbers, std::string argName, int numberOfTests);
};
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我试图对这样的测试结构进行排序:
WilxList::WilxList(std::vector<double> &argNumbers, std::string argName, int numberOfTests)
{
//Omitted code
std::vector<Test> sortedTests;
//Omitted code where Tests are created and added to the vector inside for loop
std::sort(sortedTests.begin(), sortedTests.end(), testSorter); //ERROR
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}
我得到的错误是:
error C3867: 'WilxList::testSorter': function call missing argument list;
use '&WilxList::testSorter' to create a pointer to member
c:\users\stenver\documents\visual …Run Code Online (Sandbox Code Playgroud)