To elaborate further, use this (note double quotes):
instead of this:
to achieve the same effect as your first fragment.
And, BTW, you probably meant to do this:
$Call = "gawk";
$Call = "-f";
$Call = "test.gawk";
$Call = "test.file";
$Call = ">";
$Call = "out.file";
or (slightly more efficiently) this:
@Call = ( "gawk",
rather than your original code, which is assigning values to 1-element array slices, which are sublists -- NOT arrays! -- of references to the elements of the @Call array; needless to say, although it works, it is somewhat less efficient than either of the above approaches, and bad practice besides.
Give a man a fish and you feed him for a day ...
Teach the man to fish and you feed him for a lifetime
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