From: Just Another Victim of the Ambient Morality <i_hate_spam@...>
Date: 2007-07-12T03:25:00+09:00
Subject: Re: How to repeat string patterns in Ruby?


"Jano Svitok" <jan.svitok@gmail.com> wrote in message 
news:8d9b3d920706201328s697fbbaoe1c5e52cab21b9b1@mail.gmail.com...
> On 6/19/07, Robert Klemme <shortcutter@googlemail.com> wrote:
>> On 19.06.2007 02:53, Just Another Victim of the Ambient Morality wrote:
>> >     I have some funky Python code that I'm trying to modify but it's
>> > formatted with spaces instead of tabs, making it impossible to change. 
>> > Now,
>> > there may be many different ways to solve this problem but the first 
>> > impulse
>> > I had was to write a small Ruby script to reformat the code.
>> >     Now, a certain pattern came up in my solution that I have seen 
>> > before.
>> > I wanted to do something like this:
>> >
>> > num_tabs = num_spaces / tab_width
>> > tabs = num_tabs.collect { "\t" }.join
>> >
>> >     ...but I discovered that there is not collect method in the integer
>> > object.  The best I could come up with was:
>> >
>> > tabs = ''
>> > num_tabs.times { tabs << "\t" }
>> >
>> >     Is there a more succinct, more Ruby-esque way to do this?
>> >     Thank you...
>>
>> $ expand --help
>> Usage: expand [OPTION]... [FILE]...
>> Convert tabs in each FILE to spaces, writing to standard output.
>> With no FILE, or when FILE is -, read standard input.
>>
>> Mandatory arguments to long options are mandatory for short options too.
>>    -i, --initial       do not convert tabs after non blanks
>>    -t, --tabs=NUMBER   have tabs NUMBER characters apart, not 8
>>    -t, --tabs=LIST     use comma separated list of explicit tab positions
>>        --help     display this help and exit
>>        --version  output version information and exit
>>
>> Report bugs to <bug-coreutils@gnu.org>.
>>
>> :-)
>
> Maybe this one would be better:
>
> unexpand --help
> Usage: unexpand [OPTION]... [FILE]...
> Convert blanks in each FILE to tabs, writing to standard output.
> With no FILE, or when FILE is -, read standard input.
>
> Mandatory arguments to long options are mandatory for short options too.
>  -a, --all        convert all blanks, instead of just initial blanks
>      --first-only convert only leading sequences of blanks (overrides -a)
>  -t, --tabs=N     have tabs N characters apart instead of 8 (enables -a)
>  -t, --tabs=LIST  use comma separated LIST of tab positions (enables -a)
>      --help     display this help and exit
>      --version  output version information and exit
>
> Report bugs to <bug-coreutils@gnu.org>.
>
> :)

    All useful information, thank you...