Variables should always have a smaller scope possible. The argument behind that is that every time you increase the scope, you have more code that potentially modifies the variable, thus more complexity is induced in the solution. It is thus clear that avoiding using global variables is preferred if the design and implementation naturally allow … Read more
The delete operator removes a property from an object. It cannot remove a variable. So the answer to the question depends on how the global variable or property is defined. (1) If it is created with var, it cannot be deleted. For example: (2) If it is created without var, it can be deleted. Technical Explanation 1. Using var In … Read more
From the official Swift programming guide: Global variables are variables that are defined outside of any function, method, closure, or type context. Global constants and variables are always computed lazily. You can define it in any file and can access it in current module anywhere. So you can define it somewhere in the file outside of any scope. … Read more
How do I declare a global variable in Visual Basic? These variables need to be accessible from all the Visual Basic forms. I know how to declare a public variable for a specific form, but how do I do this for all the forms in my project?
I see most examples from Google is they use only functions in a single giant script. e.g. https://developers.google.com/apps-script/quickstart/macros But in our style, we usually write all functions under a single namespace, such as However, when I run the code above, it return How to solve?
Warning: The following answer is using Vue 1.x. The twoWay data mutation is removed from Vue 2.x (fortunately!). In case of “global” variables—that are attached to the global object, which is the window object in web browsers—the most reliable way to declare the variable is to set it on the global object explicitly: However form Vue’s hierarchy perspective … Read more
You must use extern, otherwise you will have separated bShouldRegister variables in each translation unit with probably different values. Put this in a header file (.h): Put this in one of implementation files (.cpp):
At first, a config file is appropriate for this kind of things but you may also use another approach, which is as given below (Laravel – 4): To get the same data in any controller you may use: There are many ways, just use one or another, which one you prefer but I’m using the … Read more
When you use a command substitution (i.e., the $(…) construct), you are creating a subshell. Subshells inherit variables from their parent shells, but this only works one way: A subshell cannot modify the environment of its parent shell. Your variable e is set within a subshell, but not the parent shell. There are two ways to pass values from … Read more
When you use a command substitution (i.e., the $(…) construct), you are creating a subshell. Subshells inherit variables from their parent shells, but this only works one way: A subshell cannot modify the environment of its parent shell. Your variable e is set within a subshell, but not the parent shell. There are two ways to pass values from … Read more