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The role of #ifdef and #ifndef

In this what is the role of #ifdef and #ifndef , and what's the output? 4 Answers 4...
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jQuery AJAX submit form

I have a form with name orderproductForm and an undefined number of inputs. 20 Answers ...
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Declare a const array

... @Anton, have you and your "followers" removed downvote? To me static is not required to make it working, it just add possibility to reference Titles without having instance, but remove possibility to change value for different instances (e.g....
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How can I add the new “Floating Action Button” between two widgets/layouts

I guess you have seen the new Android design guidelines, with the new "Floating Action Button" a.k.a "FAB" 10 Answers ...
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C++ Dynamic Shared Library on Linux

...ain(int argc, char **argv) { /* on Linux, use "./myclass.so" */ void* handle = dlopen("myclass.so", RTLD_LAZY); MyClass* (*create)(); void (*destroy)(MyClass*); create = (MyClass* (*)())dlsym(handle, "create_object"); destroy = (void (*)(MyClass*))dlsym(handle, "destroy_object"); My...
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Replace all 0 values to NA

...ays in ?'NULL', NULL represents the null object in R which is unique and, I guess, can be seen as the most uninformative and empty object.1 Then it becomes not so surprising that data.frame(x = c(1, NULL, 2)) # x # 1 1 # 2 2 That is, R does not reserve any space for this null object.2 Mea...
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UIButton won't go to Aspect Fit in iPhone

I have a couple UIButtons, and in IB they're set to Aspect Fit, but for some reason they're always stretching. Is there something else you have to set? I tried all the different view modes and none of them work, they all stretch. ...
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Integrating the ZXing library directly into my Android application

I'm writing this in mere desperation :) I've been assigned to make a standalone barcode scanner (as a proof of concept) to an Android 1.6 phone. ...
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Catch a thread's exception in the caller thread in Python

I'm very new to Python and multithreaded programming in general. Basically, I have a script that will copy files to another location. I would like this to be placed in another thread so I can output .... to indicate that the script is still running. ...
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How can I find out the current route in Rails?

...ent_uri as "/my/test/path" To find out the route i.e. controller, action and params: path = ActionController::Routing::Routes.recognize_path "/your/path/here/" # ...or newer Rails versions: # path = Rails.application.routes.recognize_path('/your/path/here') controller = path[:controller] action...