C++ String Variable Declaration
You are mixing c++ and c I/O. In C++ this is,
variables
Importing variables from another file?
will import all objects and methods in file1
Mixing a PHP variable with a string literal
You can use braces to remove ambiguity when interpolating variables directly in strings. Also, this doesn’t work with single quotes. So: will output
Java, “Variable name” cannot be resolved to a variable
If you look at the scope of the variable ‘hoursWorked’ you will see that it is a member of the class (declared as private int) The two variables you are having trouble with are passed as parameters to the constructor. The error message is because ‘hours’ is out of scope in the setter.
Pass variable from one Jenkins stage to others in sh
You can output the variables to same file in stage, then read back and assign to env at the beginning of each stage as following:
How to use Global Variables in C#?
In C# you cannot define true global variables (in the sense that they don’t belong to any class). This being said, the simplest approach that I know to mimic this feature consists in using a static class, as follows: You can then retrieve the defined values anywhere in your code (provided it’s part of the same namespace): In order … Read more
C++ identifier is undefined
Reducing to three lines (the other errors are analogous): While wall is defined, gallons is not. And where do you want to get gallons from anyway? The result is hidden deep inside another function. How do you want to get it out from there? Well, you need a return value: This way, you can use your function like this: Analogously for … Read more
Python conditional assignment operator
No, the replacement is: However, wanting to use this construct is a sign of overly complicated code flow. Usually, you’d do the following: and never be unsure whether v is set or not. If it’s one of many options that can either be set or not, use a dictionary and its get method which allows a default value
Static variables in JavaScript
If you come from a class-based, statically typed object-oriented language (like Java, C++ or C#) I assume that you are trying to create a variable or method associated to a “type” but not to an instance. An example using a “classical” approach, with constructor functions maybe could help you to catch the concepts of basic OO JavaScript: … Read more
How can I determine if a variable is ‘undefined’ or ‘null’?
You can use the qualities of the abstract equality operator to do this: Because null == undefined is true, the above code will catch both null and undefined.