Re: How to understand chapter 6 of Higher Order Perl? (promise/show)

[Anonymous Monk]

https://metacpan.org/pod/HOP::Stream#promise says

promise

  my $promise = promise { ... };

A utility function with a code prototype (sub promise(&);) allowing one to specify a coderef with curly braces and omit the sub keyword.

For debugging you might try https://metacpan.org/pod/HOP::Stream#show

[Anonymous Monk]

For comparison; sub allows you to specify a coderef with curly braces. And sub allows you to omit the "promise" word.

What's the point of "promise" other than to make you type more letters?