global-variables

问题 I'm building a site on the new Razor engine that comes with MVC 3 (and loving the new syntax!). However, I am at a loss about using public properties / constants with it. I know that with WebForms we could add a public property in code behind: public string ImageFolder { get; set; } I would like to define important variables in one global place that my views can access, starting with paths to CSS files and images: @{ Layout = "~/Views/Shared/_Layout.cshtml"; var ContentFolder = "~/Content";

问题 I'm building a site on the new Razor engine that comes with MVC 3 (and loving the new syntax!). However, I am at a loss about using public properties / constants with it. I know that with WebForms we could add a public property in code behind: public string ImageFolder { get; set; } I would like to define important variables in one global place that my views can access, starting with paths to CSS files and images: @{ Layout = "~/Views/Shared/_Layout.cshtml"; var ContentFolder = "~/Content";

问题 First steps in Angular (with Material at version 9). I'm creating a form with the following code: HTML: <mat-form-field> <mat-label>Course</mat-label> <mat-select [formControl]="subjectControl" [attr.data-tag-subjectSemester]="this.subjectControl.value ? this.subjectControl.value.trim() : '' [attr.data-tag-subjectName]="this.subjectControl.value ? this.subjectControl.value.trim() : '' (selectionChange)="onChange($event)" required > <mat-option>-- None --</mat-option> <mat-optgroup *ngFor="let

问题 This question already has answers here : Python scope: “UnboundLocalError: local variable 'c' referenced before assignment” [duplicate] (4 answers) Closed 4 years ago . I've started teaching myself python, and have noticed something strange to do with global variables and scope. When I run this: x = 2 y = 3 z=17 def add_nums(): y = 6 return z+y The result of 23 is printed... However, when I expand the return to be: x = 2 y = 3 z=17 def add_nums(): y = 6 z = z + y return z I get the following

问题 Hello Developers & Coders , My question is How to define a global variable , that can be used in all controllers in Laravel ? I have defined one variable $company in AppServiceProviders's boot method - that im using in all blade views , but I can not use it in controllers file , it gives error , undefined variable $company class AppServiceProvider extends ServiceProvider { /** * Bootstrap any application services. * * @return void */ public function boot() { View::share('key', 'value');

问题 Hello Developers & Coders , My question is How to define a global variable , that can be used in all controllers in Laravel ? I have defined one variable $company in AppServiceProviders's boot method - that im using in all blade views , but I can not use it in controllers file , it gives error , undefined variable $company class AppServiceProvider extends ServiceProvider { /** * Bootstrap any application services. * * @return void */ public function boot() { View::share('key', 'value');

问题 I'm using a recursive function to sort a list in Python, and I want to keep track of the number of sorts/merges as the function continues. However, when I declare/initialize the variable inside the function, it becomes a local variable inside each successive call of the function. If I declare the variable outside the function, the function thinks it doesn't exist (i.e. has no access to it). How can I share this value across different calls of the function? I tried to use the "global" variable

问题 Even if I indicate "NOT" in a Google search, there is literally no result for this. Everybody wants to clear their global environment. I am just starting with R so I want to keep all my data and variables so I can play around. Every time I exit R it clears the global environment unless I save the image to a work space .RData file. How can I keep all my environment intact without have to save twice every time? 回答1: If you use RStudio, you can just set the option "Global Options" --> "Save

问题 I am having a problem of Undefined variable when I try to use an array inside a function. An example is the code below. How can I be able to access the array $prev inside the function hello() ? I've tried searching but I don't really know how to use $GLOBALS[$varname] when the variable is an array. Thanks for any help! <?php $prev = [0,1,2]; function hello(){ echo $prev[1]; } hello(); hello(); hello(); ?> 回答1: You can also pass the variable into the function: $prev = [0,1,2]; function hello

问题 I'm new to iPhone development so want to ask, what is the best way to keep global variables and constants which can be accessed by many classes? Shall I keep them in app delegate or there is a better way which I don't know? Thanks 回答1: Keeping them in the app delegate is one solution, though it's not particularly elegant to shove everything into a class whose purpose is really to respond to events related to the application. For constants, you can simply create header files and use #define or