Dec 02, 2015 · However since it's not a simple value but an actual object I would like to declare a class inside my function that I can instantiate then return. eg: def CreateSomeFunkyDataStructure (): class FunkyClass: def __init__ (self): self.var1 = 'Play that funky music white boy.' def getFunky (self): print 'Play that funky music right.' x = FunkyClass ...

Jun 07, 2014 · Doing something like that without a good reason is a rather wasteful thing to do. A better idea would be to provide non-defining declarations in the header file. // Declarations extern const std::string POS_ID; extern const std::string HEIGHT; extern const std::string WIDTH; extern const std::string RATIO; and place the definitions in one and ...

May 25, 2018 · Although it is a matter of opinion, it is considered better practice to keep the propTypes outside of the component as it reduces clutter inside of the component. This is also used as example usage section of the prop-types package. –

Sep 04, 2014 · The drawback of putting definition in header files is as follows:-Header file A - contains definition of metahodA() Header file B - includes header file A. Now let us say you change the definition of methodA. You would need to compile file A as well as B because of the inclusion of header file A in B.

Jun 20, 2016 · Using constants instead of #define is very much to be preferred. #define replaces the token dumbly in every place it appears, and can cause all sorts of unintended consequences. Passing values instead of using globals is good practice. It makes the code more flexible and modular, and more testable.

However, even if it provides macros, the implementation is also obliged to provid actual functions that do the same job, primarily so that you can access a function pointer called getchar () or getc () and pass that to other functions. That is, by doing: #include <stdio.h> #undef getchar extern int some_function (int (*) (void)); int core ...

Aug 26, 2016 · #define FLAG 0x80001000u When the u for unsigned is not present and because you have 4 bytes on a 32bit machine, the compiler assumes that the value is signed and 0x80001000 = -2147479552 . I'm not sure if defining reset_value as a uint32_t is good practice. Could I do this as a #define. You can of course write #define RESET_VALUE 0. But the ...

Jan 17, 2011 · Define it as a constant variable. It is a good programming practice. const wchar_t *dItemName = L"CellPhone"; In case you need to know the lenght of your string somewhere later, then define it as an array: const wchar_t dItemName [] = L"CellPhone"; Also, why #define is bad: It transforms all places where you use word dItemName to L"CellPhone ...

#define TEMPERATURE_WITH (-1) #define TEMPERATURE_WITHOUT -1 // Consider how these will compile int w = 10-TEMPERATURE_WITH; int wo = 10-TEMPERATURE_WITHOUT; // May not compile ... However, this technical fact aside, it may still be a good practice. It promotes habit, and it also serves as a reminder if that macro ever gets modified to ...

Dec 14, 2018 · Show activity on this post. The best practice is to not replicate the same code in multiple places. Define all your services, related to a component in a sub-folder named services and declare them injectable. some.service.ts: @Injectable () export class SomeService { // ... Some code } Then you can use them by injection in your components which ...

Oct 10, 2018 · I think this thought process that "#define is the way to go" must certainly be an ingrained habit and essentially a "ritualistic belief" (ie: believed it is the most correct simply because one has been doing it for years) then from years of writing in pure C.For pure C, I'll use #define for array sizes, as apparently I have no other options. For embedded C++, I'll use const.

Nov 30, 2021 · Before our Prolog final exam soon, I got some practice questions and I am stuck on one: For each integer n > 0, let Ln := {s ∈ {0, 1}+ | s ends in a string from 1 (0 + 1)n−1} be the set of bit-strings whose n-th to the last bit is 1. That is, Ln is described by the regular expression (0 + 1)∗1 (0 + 1)n−1. Define a DCG for the 3-ary ...

Mar 22, 2009 · An interface definition language (IDL) is used to set up communications between clients and servers in remote procedure calls (RPC). There have been many variations of this such as Sun RPC, ONC RPC, DCE RPC and so on. Basically, you use an IDL to specify the interface between client and server so that the RPC mechanism can create the code stubs ...

Aug 12, 2021 · Normally in Python, constants are capitalized ( PEP 8 standards) which helps the programmer know it's a constant. Ex. MY_CONSTANT = "Whatever". Another valid way of doing it which I don't use but heard of, is using a method: def MY_CONSTANT (): return "Whatever". Now in theory, calling MY_CONSTANT () acts just like a constant.