Hash.new(obj) of any signifficant value?

[transfire]

Is this form of Hash initialization really very useful?

Hash.new(obj) => aHash

If _obj_ is specified, this single object will be used for all
_default values_.

Since the object is the _same_ object every time, I have never found a
use for it. I would much rather:

Hash.new( hash ) => aHash

If _hash_ is specified, the key-value pairs of this hash will
populate the new hash.

Besides, you can still get the former behavior like this:

Hash.new { |h,k| h[k] = obj }

And if that's not enough then:

Hash.new_with_default(obj)

T.

 

[Ryan Davis]

Is this form of Hash initialization really very useful?

Hash.new(obj) => aHash

If _obj_ is specified, this single object will be used for all
_default values_.

I use Hash.new(0) constantly...

 

[transfire]

I use Hash.new(0) constantly...

Okay, I can see that.

T.

 

[Morton Goldberg]

I found the following useful

include Curses

DISPATCH = Hash.newbeep)
DISPATCH[?A] = :abort # abort
DISPATCH[?h] = :key_help # show help
# ...
DISPATCH[?z] = :undo # undo previous move

for implementing a keystroke command dispatch table.

Regards, Morton