logo
down
shadow

How to find out how namespace got polluted?


How to find out how namespace got polluted?

Content Index :

How to find out how namespace got polluted?
Tag : cpp , By : bikefixxer
Date : January 02 2021, 06:48 AM


Comments
No Comments Right Now !

Boards Message :
You Must Login Or Sign Up to Add Your Comments .

Share : facebook icon twitter icon

What does it mean global namespace would be polluted?


Tag : javascript , By : user183526
Date : March 29 2020, 07:55 AM
like below fixes the issue Quick Note On Garbage Collection
As variables lose scope, they will be eligible for garbage collection. If they are scoped globally, then they will not be eligible for collection until the global namespace loses scope.
var arra = [];
for (var i = 0; i < 2003000; i++) {
 arra.push(i * i + i);
}
(function(){
 var arra = [];
 for (var i = 0; i < 2003000; i++) {
  arra.push(i * i + i);
 }
})();
var x1 = 5;
var x2 = 20;
var y1 = 3
var y2 = 16;

var rise = y2 - y1;
var run = x2 - x1;

var slope = rise / run;

var risesquared = rise * rise;
var runsquared = run * run;

var distancesquared = risesquared + runsquared;

var distance = Math.sqrt(dinstancesquared);
//Calculate is the only exposed global variable
var Calculate = function () {
 //all defintions in this closure are local, and will not be exposed to the global namespace
 var Coordinates = [];//array for coordinates
 var Coordinate = function (xcoord, ycoord) {//definition for type Coordinate
   this.x = xcoord;//assign values similar to a constructor
   this.y = ycoord;
  };

  return {//these methods will be exposed through the Calculate object
   AddCoordinate: function (x, y) {
   Coordinates.push(new Coordinate(x, y));//Add a new coordinate
  },

  Slope: function () {//Calculates slope and returns the value
   var c1 = Coordinates[0];
   var c2 = Coordinates[1];
   return c2.y - c1.y / c2.x - c1.x;//calculates rise over run and returns result
  },

  Distance: function () {
   //even with an excessive amount of variables declared, these are all still local
   var c1 = Coordinates[0];
   var c2 = Coordinates[1];

   var rise = c2.y - c1.y;
   var run = c2.x - c1.x;

   var risesquared = rise * rise;
   var runsquared = run * run;

   var distancesquared = risesquared + runsquared;

   var distance = Math.sqrt(distancesquared);

   return distance;
  }
 };
};

//this is a "self executing closure" and is used because these variables will be
//scoped to the function, and will not be available globally nor will they collide
//with any variable names in the global namespace
(function () {
 var calc = Calculate();
 calc.AddCoordinate(5, 20);
 calc.AddCoordinate(3, 16);
 console.log(calc.Slope());
 console.log(calc.Distance());
})();

Is javascript namespace polluted?


Tag : javascript , By : Pat
Date : March 29 2020, 07:55 AM
will help you Your while loop runs infinitely on the third pass because it doesn't meet the condition.

C++ redefinition of variable, global namespace polluted and I don't know why


Tag : cpp , By : alexmajy
Date : March 29 2020, 07:55 AM
around this issue time() is a function in standard C, which means that it's living outside a namespace so that "old" C code can be compiled with C++ compilers without having lots of using namespace std thrown in all over the place.
The header time.h is apparently included when you include , which is why you get a reference to that.
....
#pragma GCC system_header

#include <bits/c++config.h>
#include <time.h>

#ifndef _GLIBCXX_CTIME
#define _GLIBCXX_CTIME 1

 ...     
namespace std
{
  ...
  using ::time;
  ...
} // namespace

Package's namespace polluted by Django?


Tag : python , By : fukas78
Date : March 29 2020, 07:55 AM
hop of those help? This is normal Python behaviour.
When you import a submodule, that submodule is set as an attribute on the parent module. In this case, when simplelib.models is imported, the models submodule is set on the parent module simplelib. The parent module namespace is the same as that module's __init__.py global namespace. This will overwrite the old value.

Python __init__.py, less polluted namespace


Tag : python , By : Singularity
Date : March 29 2020, 07:55 AM
hop of those help? This behaviour is documented in chapter 5 of the Python Language Reference. If you really want to disable it, you can do this in __init__.py:
from .baz import do_something
del baz
Related Posts Related QUESTIONS :
  • Why is empty unordered_map.find not returning end()?
  • Template argument deduction for inheriting specializations
  • dlopen undefined reference
  • Member function of class with template arguments and default arguments outside class
  • Is it possible to implement a non-owning "slightly smart" pointer on top of standard weak pointers?
  • how to configure the AcquireCredentialsHandleA correctly
  • Using private versions of global extern variables with OpenMP
  • Eigen Block wrong amount of columns and rows
  • Memory alignment rules in inheritance
  • Is nullptr falsy?
  • tm_wday returns a large integer outside 0-6 range
  • Scope a using declaration, inside a header
  • How to specify constructor's template arguments inside a new expression?
  • Sort an array via x86 Assembly (embedded in C++)?? Possible?
  • How to Replace only Part of the Variable using #define
  • How do you compare the performace of valarrays vs built-in arrays?
  • Is it normal for C++ static initialization to appear twice in the same backtrace?
  • c++ generate a good random seed for psudo random number generators
  • Why isn't my operator overloading working properly?
  • Getting meaningful error messages from fstream's in C++
  • C++: Converting Julian dates to Gregorian
  • Could someone explain this interesting behaviour with Sleep(1)?
  • Is it possible to roll a significantly faster version of modf
  • Updating pointer using signals and slots
  • How are classes more secure than structures?
  • finding "distance" between two pixel's colors
  • C++ Greatest Number Verification
  • Why does my token return NULL and how can I fix it?(c++)
  • C++ enforce conditions on inherited classes
  • what happened if an exception is not captured?
  • Redundant naming in C/C++ typedefs/structs
  • question about STL thread-safe and STL debugging
  • killing a separate thread having a socket
  • Returning the size of available virtual memory at run-time in C++
  • Parallel computing for integrals
  • How do I force my std::map to deallocate memory used?
  • C++ Templates: implicit conversion, no matching function for call to ctor
  • Adding python script to c++ project
  • C++ private pointer "leaking"?
  • Initializing Primitive Array to One Value
  • how is push_back implemented in STL vector?
  • C++ Profiling: KiFastSystemCallRet
  • Multiple rows with a single INSERT in SQLServer 2008
  • Use super class's address/pointer in initialization list
  • double fork using vfork
  • Convert char pointer (char*) to struct
  • Does anyone have good tips for using pc-lint?
  • C++ How fast is passing around objects?
  • template type's ctor arguments at instantiation time
  • Get list of windows in taskbar on Windows 7?
  • Curl connection options
  • Best cross-platform solution for network server?
  • simple c++ file opening issue
  • Switching from C++ (with a lot of STL use) to C for interpreter building
  • How can I access the JPEG image pixels as a 3D array like we do in MATLAB?
  • What wording in the C++ standard allows static_cast<non-void-type*>(malloc(N)); to work?
  • Avoid allocating in constructor or preserve simplicity (and RAII?)
  • Can C++ raise an error when std array initialization is too small?
  • Reference to end is ambiguous
  • Problem with basic usage of std::enable_if
  • shadow
    Privacy Policy - Terms - Contact Us © scrbit.com