Path: csiph.com!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail
From: egarrulo <egarrulo@gmail.com>
Newsgroups: comp.lang.java.programmer
Subject: Re: Libraries for sysadmins?
Date: Fri, 4 Mar 2016 20:30:17 +0100
Lines: 52
Message-ID: <dju62bFf4ouU1@mid.individual.net>
References: <2cec6af2-9636-4a2a-8849-b01286c0814c@googlegroups.com> <sysadmins-20160304161143@ram.dialup.fu-berlin.de> <djttl0Fct5hU1@mid.individual.net>
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 7bit
X-Trace: individual.net 20LWNP1V4Z6NdIhSxisweQtx0QrEWQIKD0iP4vpLibCBHiCzmK
Cancel-Lock: sha1:Bt97RDo2KSQKh0w3Qu8XDGWrI3U=
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0
In-Reply-To: <djttl0Fct5hU1@mid.individual.net>
Xref: csiph.com comp.lang.java.programmer:33923

On 04/03/16 18:06, Robert Klemme wrote:
>
> 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

Wow!  The Java version is remarkably concise and compares favourably 
with the Ruby version.  Where could I find more of these examples of 
"short and sweet" Java?  In the "Java Cookbook" (3rd edition)  by Ian F. 
Darwin, maybe?