JShell /-n command

[Michael Müller]

+1
-- 
Herzliche Grüße, Best regards
Michael Müller

Twitter: @muellermi
Blog: blog.mueller-bruehl.de
Web Development with Java and JSF: leanpub.com/jsf
Java Lambdas and Parallel Streams: leanpub.com/lambdas


Am 13. Oktober 2016 19:04:08 MESZ, schrieb Brian Goetz <brian.goetz at oracle.com>:
>This is derived from a feature from Unix shells, which I use all the 
>time; frequently you have a sequence of "do this, then do that, then do
>
>the other thing", and doing "-n" repeatedly handles that sequence.  
>Easier than "hit up arrow five times, return, repeat".
>
>On 10/12/2016 5:15 PM, Robert Field wrote:
>> I agree this isn't useful and is confusing -- for another reason too 
>> -- from /help:
>>
>> | /<id> -- re-run snippet by id
>> | /-<n> -- re-run n-th previous snippet
>>
>> So /3 refers to a snippet-id and /-3 refers to a count backwards.
>>
>> I've never used the /-n form.  For one, the up-arrow is much more 
>> convenient.
>>
>> Unless I hear an strong advocate, I will remove.
>>
>> Thanks,
>> Robert
>>
>> On 10/12/16 09:55, Paul Deitel wrote:
>>> Is the command
>>>
>>>     /-n
>>>
>>> actually useful? Chances are, if you have any decent number of 
>>> snippets, you will not recall more than the last few you typed.
>>>
>>> You can already execute the last valid snippet with /!.
>>>
>>> For anything else, you’d probably have to do a /list to see what 
>>> valid snippets you have. At that point, rather than doing /-n, you’d
>
>>> just use /<id> to execute a given snippet.
>>>
>>> One point of emphasis in many JShell presentation has been how it’s 
>>> useful for beginners. I’ve been teaching beginning programmers for 
>>> 25+ years. A beginner seeing options like this will only get
>confused.
>>>
>>> I recommend removing /-n as an option.
>>>
>>> Paul
>>>
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>>