I know that in various programming languages there is an option to hold two or more variables (or just one variable) by some variable; a typical example in general is to store coordinates.
Is this practice of holding two or more variables by one variable exist in shell (say, Bash) and what would be a typical example?
In order to get the values out you typically give the values names. For a coordinate example you might use x and y, and then have some syntax like point.x to get to it.
Bash has associative arrays, which are like maps or hash tables in other languages. You can use them as
declare -A point
point[x]=3
point[y]=4
echo "${point[x]}"
The syntax is ugly, but feature like this need to be added in a (mostly) backward compatible way. The Bourne shell has been around since 1979 (currently 42 years) and it is hard to find new constructs which don't already mean something.
D2[hook,x]=45; D2[line,y]=88;
structorobjectin C++ don't exist in the shell, if that is what you are referring to.Position="$x,$y" and split them asIFS=, read -r x y <<<"${Position}"`. But I would usually take this as a hint that awk or perl might be a better solution.