The SVG Parameter Variables Specification would do what you want but it’s unlikely ever to be completed, let alone implemented by UAs. Instead SVG looks like it will move towards attributes being CSS parameters at which point you could use CSS Calc. There is a light at the end of the tunnel for you though … Read more
The two different approaches have names: Lisp-1 and Lisp-2. A Lisp-1 has a single namespace for both variables and functions (as in Scheme) while a Lisp-2 has separate namespaces for variables and functions (as in Common Lisp). I mention this because you may not be aware of the terminology since you didn’t refer to it … Read more
That’s completely expected. Variables have a scope to them. If you define them inside of a control block (like an if statement), then they won’t be available outside. So, what you need to do is initialize it outside like so: $text-color: null; $background-color: null; @if $colorscheme == white { $text-color: #333; $background-color: #fff; } @else … Read more
Your code gets compiled before execution, at that step your variable will be replaced by the actual reference of the space where the value will be stored. This at least is the general principle. In reality it will be way more complecated, but still the same basic idea.
printf allows interpolation of variables. With this as the test file: $ cat file a,b,APPLE,d,MANGO,f We can use printf to achieve the output you want as follows: $ awk -F, ‘{printf “/p/%s_abc/xyz/%s_abc_def/\n”,$3,$5;}’ file /p/APPLE_abc/xyz/MANGO_abc_def/ In printf, the string %s means insert-a-variable-here-as-a-string. We have two occurrences of %s, one for $3 and one for $5.
Use the execute command. Everything after it is an expression that evaluates to a string, which it then executes like a command you had typed in yourself. function Ls(dir) execute ‘!ls ‘ . a:dir endfunction This says, “Evaluate the expression ‘!ls ‘ . a:dir and then execute it.” The variable a:dir is expanded, the dot … Read more
Your problem stems from a misunderstanding of the or operator that is common to people learning programming languages like this. Yes, your immediate problem can be solved by writing x ~= 0 and x ~= 1, but I’ll go into a little more detail about why your attempted solution doesn’t work. When you read x … Read more
I believe the confusion is because you’re conflating names with storage. fn main() { let x = 5; // x_0 println!(“The value of x is {}”, x); let x = 6; // x_1 println!(“The value of x is {}”, x); } In this example, there is one name (x), and two storage locations (x_0 and … Read more
To complement Keith Hill’s helpful answer with a PSv3+ alternative: The $using: scope modifier can be used to reference the values of variables in the caller’s scope inside the script block passed to Start-Job, as an alternative to passing arguments (by default, a script block executed as a background job does not see any of … Read more