global

问题 To have some exercise in learning Python, and especially with Object orientated programming. I'm creating a simple text based game. I'm a bit struggling with the use of global variables. People say it's better to avoid them. My question how can I make thing work without them and where to declare those variables. Currently in my main() method I'll start the game based on Classes for every room or interaction that can happen in the game. But there are some objects I want to access anytime, like

问题 So let's say I have a lua file, and at the top, I define a variable outside of any function, but I call it local local x = 1 Is there any difference between that local x, and a global x? 回答1: Yes, as it is local to the chunk that it is created in. Lua handles a chunk as the body of an anonymous function with a variable number of arguments (see §3.4.11). As such, chunks can define local variables, receive arguments, and return values. Moreover, such anonymous function is compiled as in the

问题 i've implemented a global variable but i dont really know how to access it. The examples i have found are a bit confusing. models.py ... # Categorys of Post Model class Category(models.Model): title = models.CharField(max_length=255, verbose_name="Title") class Meta: verbose_name = "Category" verbose_name_plural = "Categories" ordering = ['title'] def __str__(self): return self.title #Post Model class Post(models.Model): author = models.ForeignKey('auth.User', on_delete=models.CASCADE) title

问题 I have a RegExp, doing a string replace, with global set. I only need one replace, but I'm using global because there's a second set of pattern matching (a mathematical equation that determines acceptable indices for the start of the replace) that I can't readily express as part of a regex. var myString = //function-created string myString = myString.replace(myRegex, function(){ if (/* this index is okay */){ //!! want to STOP searching now !!// return //my return string } else { return

问题 Using Razor Pages ASP.Net Core, I have some functions that I'd like to use on every page. I guess this used to be done with App_Code, but that no longer seems to work in Core. How can I accomplish this in Asp.Net Core Razor Pages? 回答1: Option 1 - DI 1 - Create the service class with the relevant functionality public class FullNameService { public string GetFullName(string first, string last) { return $"{first} {last}"; } } 2- Register the service in startup services.AddTransient

问题 Using Razor Pages ASP.Net Core, I have some functions that I'd like to use on every page. I guess this used to be done with App_Code, but that no longer seems to work in Core. How can I accomplish this in Asp.Net Core Razor Pages? 回答1: Option 1 - DI 1 - Create the service class with the relevant functionality public class FullNameService { public string GetFullName(string first, string last) { return $"{first} {last}"; } } 2- Register the service in startup services.AddTransient

问题 I want to create a file with takes a given list of variables for example: a1 = 3 a2 = 3 a3 = 4 a4 = 6 a5 = 'test' a6 = 19 a7 = 19 The output should be look as follows: test.txt a1 = 3 a2 = 3 a3 = 4 a4 = 6 a5 = 'test' a6 = 19 a7 = 19 Content of txt file. It is needed for setting up a model. I tried this way: def namestr(obj, namespace): names = [name for name in namespace if namespace[name] is obj] name = [n for n in names if 'a' in n] return name[0] with open("setupfile.txt", "w") as

问题 This question already has answers here : What is the g object in this Flask code? (1 answer) Are global variables thread safe in flask? How do I share data between requests? (3 answers) Closed 2 years ago . What I want is to share a variable between 2 flask requests! The variable is a large pandas dataframe. I have read in this answer that i need to use g from flask global ! basically, I have 2 views function like this : from flask import g @home.route('/save', methods=['GET']) def save

问题 This question already has answers here : What is the g object in this Flask code? (1 answer) Are global variables thread safe in flask? How do I share data between requests? (3 answers) Closed 2 years ago . What I want is to share a variable between 2 flask requests! The variable is a large pandas dataframe. I have read in this answer that i need to use g from flask global ! basically, I have 2 views function like this : from flask import g @home.route('/save', methods=['GET']) def save

问题 How to initialize a global array with -1 values in C ? Please tell me. 回答1: In C the initialization of a variable is assigning it an initial value so that, even before the program starts its execution , the memory location in which the variable is stored contains the assigned value. The only way to initialize an array of integers so that all its elements will have a value different to 0 is defining all its element one by one : int arr[5] = { -1, -1, -1, -1, -1 }; This could be difficult to