Feature #5735
closedExtending the use of splat operator to when it is inside a hash
Description
Ruby convention of allowing omittion of the curly brackets for the last argument is convenient:
foo(arg1, arg2, 1 => :a, 2 => :b)
Sometimes, I want to pass a hash with some modifications. For example, suppose h = {3 => :c, 4 => :d, 5 => :e}
is a hash already defined and that I want to add some key-value pairs as well as overwrite some values of h
, such as {3 => :c, 4 => :f, 5 => :e, 6 => :g}, and pass that. The current convention only allows:
foo(arg1, arg2, h.merge(4 => :f, 6 => :g))
but it would be more convenient if a hash preceded by the splat operator is placed in a hash, it is interpreted as part of the hash, allowing notations like:
foo(arg1, arg2, *h, 4 => :f, 6 => :g)
or, if I want to overwrite the hash {4 => :f, 6 => :g}
with h
, then:
foo(arg1, arg2, 4 => :f, 6 => :g, *h)
Or besides the argument position, in general, usages like the following:
{3 => :h, *h, 4 => :f, 6 => :g}
This is an analogy from the splat operator used within an array:
[1, 2, *[4, 5, 6], 7, 8]