On Tue, Jan 5, 2010 at 8:45 PM, Phlip <phlip2...@gmail.com> wrote:
>
> Here's a super easy example:
>
> { 42: 'forty two' }.get(41, None)
>
> Because I can supply a default, I can decide what is an error and what
> is .
>
> Now the equivalent in a language that does not enjoy this false "Zen":
>
> { 42: 'forty two' }[41] # returns None
> { 42: 'forty two' }.fetch(41, None) # ibid
> { 42: 'forty two' }.fetch(41) # raises an exception
Here's another super easy example.
Should
{42 : 'forty two'}[41]
be treated the same as
{41: None}[41] ?
In cases where None is a valid result, you can't use it to signal failure.
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