From: Martin DeMello <martindemello@...>
Date: 2003-09-22T00:06:46+09:00
Subject: Re: RCR: New interpreter switch

Eric Hodel <drbrain@segment7.net> wrote:
> 
> Martin DeMello (martindemello@yahoo.com) wrote:
>> while gets
>>   print $_.instance_eval {
>>     ...
>>   }
>> end

>> This would generalise the existing technique of mixing a few String
>> methods like gsub and scan into Kernel and having them act implicitly on
>> $_.
> 
> Its already got that, use ruby -h. -n and -p do those things

No they don't. For instance, calling the new flag -j (all the good names
were taken!)

ruby -n -e 'puts $_.split.join(" | ")'
ruby -p -e '$_ = $_.split.join(" | ") + "\n"'
ruby -j -e 'split.join(" | ") + "\n"'

(and a nice convenience method to go along would be String#n, to add a
newline to the end of a string, so we could say 'split.join.n')

> Additionally:
> 
> $ ri Kernel#gets

[...]

Yes, that was the 'existing technique' I referred to.

martin