Hashes and keyword arguments

[Martin DeMello]

Will Ruby's keyword arguments still be implemented by passing in a
hash internally? A problem just occurred to me - a duplicate key in a
hash simply overwrites the previous value; however, in an argument ilst
I'd want to flag it as an error. Is that possible?

martin

 

[Yukihiro Matsumoto]

Hi,

In message "Hashes and keyword arguments"

|Will Ruby's keyword arguments still be implemented by passing in a
|hash internally? A problem just occurred to me - a duplicate key in a
|hash simply overwrites the previous value; however, in an argument ilst
|I'd want to flag it as an error. Is that possible?

It will be implemented using Hash. But duplicate key in a calling
argument list will be warned (or raise exception).

matz.

 

[Martin DeMello]

Hi,

In message "Hashes and keyword arguments"

|Will Ruby's keyword arguments still be implemented by passing in a
|hash internally? A problem just occurred to me - a duplicate key in a
|hash simply overwrites the previous value; however, in an argument ilst
|I'd want to flag it as an error. Is that possible?

It will be implemented using Hash. But duplicate key in a calling
argument list will be warned (or raise exception).

Thanks - that's reassuring. How does it work? Will the same exception be
available as an option for normal Hashes?

martin

 

[Yukihiro Matsumoto]

Hi,

In message "Re: Hashes and keyword arguments"

|> It will be implemented using Hash. But duplicate key in a calling
|> argument list will be warned (or raise exception).
|
|Thanks - that's reassuring. How does it work? Will the same exception be
|available as an option for normal Hashes?

Possible for hash literals.

matz.