Quirky behaviour that I can't explain [SEC=UNCLASSIFIED]

The following code in NCL generates an error on the second call to get_xx(). Why?

;-------------------------------------------------------------------

undef("get_x")
function get_x(x:string)
begin
return x
end

undef("get_xx")
function get_xx()
begin
return get_x("x")
end

print(get_xx())

print(get_xx())

;-------------------------------------------------------------------

I suspect that it is because the string ceases to exist for the second call, but I don't understand why.

;-------------------------------------------------------------------

undef("get_x")
function get_x(x:string)
begin
return (/ x /)
end

;-------------------------------------------------------------------

Wrapping the argument in braces fixes the problem.

Regards,
  Griffith Young.
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Received on Mon Jan 9 23:55:53 2012