parameter-passing


Pass param packed args into a std::queue to call with a different function later

随声附和 提交于 2020-02-23 06:44:30
问题 I asked a similar question earlier without realizing that that wasn't quite specific enough. So I have this function that has to take in all the arguments of a print function, with the ... and all, and then put it into a queue that will call the actual print function later. Something like: std::queue<SOMETHING> queue; template <typename... Params> void printLater(int a, int b, char* fmt, Params ...args) { queue.push(args); } template <typename... Params> void print(int a, int b, char* fmt,

r shiny error Error in as.vector(x, “character”) : cannot coerce type 'closure' to vector of type 'character'

断了今生、忘了曾经 提交于 2020-02-16 06:57:26
问题 While trying to pass an user entered input (empId) from Shiny UI into a sql query on shiny server.r not sure how to debug this error. Error in as.vector(x, "character") : cannot coerce type 'closure' to vector of type 'character' UI.r library(shiny) shinyUI(fluidPage( titlePanel("Employee Table (AdventureWorks)"), sidebarLayout( sidebarPanel((""), textInput("idnumb", "Employee ID number",""), submitButton("Ok")), mainPanel(tableOutput("emptitle"))))) Server.r shinyServer(function(input,

Python (3.6.3) argparse: default value of optional parameter to be another parameter's value

旧城冷巷雨未停 提交于 2020-02-06 07:58:50
问题 I have a function that takes as parameters an input folder (required) and output folder (optional), but I want the default value of the (optional) output folder to be the input folder. I can do this of course using, e.g. p = argparse.ArgumentParser(description="blah") p.add_argument('inpath', type=str, help="Path to input") p.add_argument('--outpath', required=False, type=str, help="Path to output") argin = p.parse_args() if argin.outpath is None: argin.outpath = argin.inpath but I want to

Adding parameters to Runtime.getRuntime()?

对着背影说爱祢 提交于 2020-02-06 05:49:40
问题 void restartWeb() { try { String[] command = new String[] {"webRestarter.exe" , ">>","webLog.log"}; Runtime.getRuntime().exec(command); } catch (java.io.IOException err) { webServer.logError(err.getMessage()); } } Why doesn't this work? How could I fix it so it does work like I want it to? -- Executes webRestarter.exe with parameters >>webLog.log So it'd spit out something like this: webRestarter.exe>>webLog.log 回答1: You simply can't use pipes in a exec call. Pipes are a functionality of the

Adding parameters to Runtime.getRuntime()?

蹲街弑〆低调 提交于 2020-02-06 05:49:31
问题 void restartWeb() { try { String[] command = new String[] {"webRestarter.exe" , ">>","webLog.log"}; Runtime.getRuntime().exec(command); } catch (java.io.IOException err) { webServer.logError(err.getMessage()); } } Why doesn't this work? How could I fix it so it does work like I want it to? -- Executes webRestarter.exe with parameters >>webLog.log So it'd spit out something like this: webRestarter.exe>>webLog.log 回答1: You simply can't use pipes in a exec call. Pipes are a functionality of the

Argparse: mixing parent parser with subparsers

馋奶兔 提交于 2020-02-05 03:23:51
问题 I want to write a simple tool that takes an arbitrary number of input files and performs one operation on each of them. The syntax is stupidly simple: mytool operation input1 input2 ... inputN Some of these operations may require an extra argument mytool operation op_argument input1 input2 ... inputN In addition to this I'd like the users to be able to specify whether the operations should be performed in place, and to specify the target directory of the output. mytool -t $TARGET --in-place

Some trouble passing a “const char” parameter in templates even in Visual C++ Compiler Nov 2013 CTP

自古美人都是妖i 提交于 2020-02-04 07:29:26
问题 Hi and happy new year to everyone, I have some troubles passing passing a "const char" parameter in templates even in the last versión Compiler Nov 2013 CTP of Visual C++! This is the simple code that doesn't work in the latest Visual C++ compiler but yes with "g++" with the option "std=c++x0", #include <stdlib.h> template<char _parameterChar> class A { char varChar; public: A(){ varChar = _parameterChar; } ~A(){} }; int main(int argc, char* argv[]) { const char a_1 = 'a'; const char a_2 =

Rails: can't pass variable to partial, what am I doing wrong?

一笑奈何 提交于 2020-02-02 16:07:16
问题 I'm trying a few different ways to define and pass the local variable to the partial, but it keeps saying it's undefined: in Show file: <% @startups.each do |startup| %> <%= render :partial => "profile/startup" %> <% end %> in partial: <%= simple_form_for [@commentable, @comment], :remote => true do |form| %> <%= form.input :content, label: false, :input_html => { :id => "#{startup.user_id}" } %> <%= form.submit "Submit" %> <% end %> These are the other ways I'm trying to pass the variable,

Rails: can't pass variable to partial, what am I doing wrong?

扶醉桌前 提交于 2020-02-02 16:02:23
问题 I'm trying a few different ways to define and pass the local variable to the partial, but it keeps saying it's undefined: in Show file: <% @startups.each do |startup| %> <%= render :partial => "profile/startup" %> <% end %> in partial: <%= simple_form_for [@commentable, @comment], :remote => true do |form| %> <%= form.input :content, label: false, :input_html => { :id => "#{startup.user_id}" } %> <%= form.submit "Submit" %> <% end %> These are the other ways I'm trying to pass the variable,

Rails: can't pass variable to partial, what am I doing wrong?

ⅰ亾dé卋堺 提交于 2020-02-02 16:00:06
问题 I'm trying a few different ways to define and pass the local variable to the partial, but it keeps saying it's undefined: in Show file: <% @startups.each do |startup| %> <%= render :partial => "profile/startup" %> <% end %> in partial: <%= simple_form_for [@commentable, @comment], :remote => true do |form| %> <%= form.input :content, label: false, :input_html => { :id => "#{startup.user_id}" } %> <%= form.submit "Submit" %> <% end %> These are the other ways I'm trying to pass the variable,

工具导航Map