Design problem with 'inject'

ruby-talk
21

wow - you learn something every day - that's great!

cheers.

-a

···

On Thu, 16 Nov 2006, Robert Klemme wrote:

Small correction: if called *without arguments* the first invocation will look like this:

>enumerable_element_1, enumerable_element_2|

%w{foo bar baz}.inject {|*a| p a}

["foo", "bar"]
[nil, "baz"]
=> nil

%w{foo bar baz}.inject(nil) {|*a| p a}

[nil, "foo"]
[nil, "bar"]
[nil, "baz"]
=> nil

This is actually useful to do something like this:

%w{foo bar baz}.inject() {|a,b| a+", "+b}

=> "foo, bar, baz"

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