I have a shell script with this code: But the conditional code always executes, because hg st always prints at least one newline character. Is there a simple way to strip whitespace from $var (like trim() in PHP)? or Is there a standard way of dealing with this issue? I could use sed or AWK, but I’d like to think there is a more elegant … Read more
You are mixing c++ and c I/O. In C++ this is,
will import all objects and methods in file1
You can use braces to remove ambiguity when interpolating variables directly in strings. Also, this doesn’t work with single quotes. So: will output
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.
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:
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
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
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
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