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Re: Libraries for sysadmins?

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I would look into using JRuby, maybe also look into Groovy (not sure how 
much alive the latter is these days).

On 04.03.2016 16:13, Stefan Ram wrote:
> Elena <egarrulo@gmail.com> writes:
>> processing text files line by line
>
>    Writing lines to a text file:
>
> new java.io.FileWriter( "c:\\example.txt" ).
> append( "alpha\n" ).close();

In (J)Ruby:

File.open("example.txt", "a") {|io| io.puts "alpha"}

>    Reading a text file line by line (not tested):
>
> final java.util.Scanner scanner
> = new java.util.Scanner( new java.io.File( "file.txt" ));
> while( scanner.hasNextLine() )
> { final java.lang.String line = scanner.nextLine();

In (J)Ruby:

File.foreach "file.txt" do |line|
   # whatever
end

>> filtering collections
>
>    (not tested):
>
> java.util.Arrays.asList( 1, 2, 3 ).stream().
> filter( x -> "x >= 2 )

Again, in (J)Ruby:

[1,2,3].select {|x| x >= 2}

(Not exactly the same, but can easily be made to if need be.)

Kind regards

	robert


-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/

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Thread

Libraries for sysadmins? Elena <egarrulo@gmail.com> - 2016-03-04 03:33 -0800
  Re: Libraries for sysadmins? Martin Gregorie <martin@address-in-sig.invalid> - 2016-03-04 11:44 +0000
    Re: Libraries for sysadmins? egarrulo <egarrulo@gmail.com> - 2016-03-04 12:56 +0100
  Re: Libraries for sysadmins? Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-03-04 07:43 -0500
  Re: Libraries for sysadmins? Robert Klemme <shortcutter@googlemail.com> - 2016-03-04 18:06 +0100
    Re: Libraries for sysadmins? egarrulo <egarrulo@gmail.com> - 2016-03-04 20:30 +0100
      Random permutations [was Re: Libraries for sysadmins?] Sebastian <news@seyweiler.dyndns.org> - 2016-03-05 00:56 +0100
        Re: Random permutations [was Re: Libraries for sysadmins?] Robert Klemme <shortcutter@googlemail.com> - 2016-03-05 12:11 +0100
          Re: Random permutations [was Re: Libraries for sysadmins?] Sebastian <news@seyweiler.dyndns.org> - 2016-03-05 16:41 +0100
            Re: Random permutations [was Re: Libraries for sysadmins?] Brixomatic <brixomatic@yahoo.com> - 2016-03-05 19:20 +0100
              Re: Random permutations [was Re: Libraries for sysadmins?] Andreas Leitgeb <avl@logic.at> - 2016-03-05 18:46 +0000
                Re: Random permutations [was Re: Libraries for sysadmins?] Brixomatic <brixomatic@yahoo.com> - 2016-03-15 19:22 +0100
                Re: Random permutations [was Re: Libraries for sysadmins?] Andreas Leitgeb <avl@logic.at> - 2016-03-15 22:30 +0000
            Re: Random permutations [was Re: Libraries for sysadmins?] Andreas Leitgeb <avl@logic.at> - 2016-03-05 18:30 +0000
              Re: Random permutations [was Re: Libraries for sysadmins?] Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-03-05 13:46 -0500
                Re: Random permutations [was Re: Libraries for sysadmins?] Andreas Leitgeb <avl@logic.at> - 2016-03-05 19:40 +0000
      Re: Libraries for sysadmins? Robert Klemme <shortcutter@googlemail.com> - 2016-03-05 12:10 +0100
    Re: Libraries for sysadmins? Arne Vajhøj <arne@vajhoej.dk> - 2016-03-04 21:42 -0500
  Re: Libraries for sysadmins? Arne Vajhøj <arne@vajhoej.dk> - 2016-03-04 21:48 -0500

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