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Re: query: how many use PHP for linux scripts [message #185971 is a reply to message #185954]

Thu, 15 May 2014 17:33

Thomas 'PointedEars'
Messages: 701
Registered: October 2010

Karma:

Senior Member

[X-Post & F'up2 comp.lang.php]

Jasen Betts wrote in alt.os.linux and alt.os.linux.ubuntu:

> white program

Sorry, my programs are mostly in green. Or blue. Depends on editor and
language.

> the reads a text file and swaps every pair of lines and
> writes a new file.
>
> so
>
> one
> two
> three
> four
>
> becomes
>
> two
> one
> four
> three
>
> design it to work on any text file.

Challenge accepted :)

First, read the file's lines into an array:

$lines = file('file.txt');

Second, swap the array elements:

$swapped = array_map(
function ($key) use ($lines) {
if ($key % 2 === 0)
{
return $lines[$key + 1];
}

return $lines[$key - 1];
},
array_keys($lines));

Third, write the result:

file_put_contents('file-new.txt', join(PHP_EOL, $swapped) . PHP_EOL);

Or, in two statements:

$lines = file('file.txt');

file_put_contents(
'file-new.txt',
join(
PHP_EOL,
array_map(
function ($key) use ($lines) {
if ($key % 2 === 0)
{
return $lines[$key + 1];
}

return $lines[$key - 1];
},
array_keys($lines)
)
) . PHP_EOL
);

> including files with lines larger than RAM + swap.

<https://en.wikipedia.org/wiki/Moving_the_goalposts>

> if it must work, it's easier in C.

I dare you to beat the above *in ease* with C.

And where did the maniac grow up whose *text* files demanded those
requirements in the first place? Why were they not LARTed when there was
still time?

PointedEars
--
Anyone who slaps a 'this page is best viewed with Browser X' label on
a Web page appears to be yearning for the bad old days, before the Web,
when you had very little chance of reading a document written on another
computer, another word processor, or another network. -- Tim Berners-Lee

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[Message index]

		query: how many use PHP for linux scripts By: crankypuss on Tue, 13 May 2014 08:17
		Re: query: how many use PHP for linux scripts By: Arno Welzel on Tue, 13 May 2014 08:37
		Re: query: how many use PHP for linux scripts By: Tim Streater on Tue, 13 May 2014 10:52
		Re: query: how many use PHP for linux scripts By: Auric__ on Tue, 13 May 2014 13:28
		Re: query: how many use PHP for linux scripts By: Jonathan N. Little on Tue, 13 May 2014 14:29
		Re: query: how many use PHP for linux scripts By: Collin Pruitt on Tue, 13 May 2014 15:00
		Re: query: how many use PHP for linux scripts By: crankypuss on Tue, 13 May 2014 16:05
		Re: query: how many use PHP for linux scripts By: Johnny on Tue, 13 May 2014 16:32
		Re: query: how many use PHP for linux scripts By: The Natural Philosoph on Tue, 13 May 2014 18:09
		Re: query: how many use PHP for linux scripts By: Tim Streater on Tue, 13 May 2014 20:35
		Re: query: how many use PHP for linux scripts By: JEDIDIAH on Tue, 13 May 2014 21:10
		Re: query: how many use PHP for linux scripts By: Tim Streater on Tue, 13 May 2014 22:03
		Re: query: how many use PHP for linux scripts By: Jerry Stuckle on Tue, 13 May 2014 23:55
		Re: query: how many use PHP for linux scripts By: Chris Ahlstrom on Wed, 14 May 2014 00:26
		Re: query: how many use PHP for linux scripts By: Jerry Stuckle on Wed, 14 May 2014 00:37
		Re: query: how many use PHP for linux scripts By: crankypuss on Wed, 14 May 2014 09:18
		Re: query: how many use PHP for linux scripts By: Jerry Stuckle on Wed, 14 May 2014 12:20
		PHP Gui Toolkits (was: query: how many use PHP for linux scripts) By: Christoph Michael Bec on Wed, 14 May 2014 12:58
		Re: PHP Gui Toolkits By: crankypuss on Thu, 15 May 2014 08:04
		Re: PHP Gui Toolkits By: Christoph Michael Bec on Thu, 15 May 2014 12:38
		Re: PHP Gui Toolkits By: The Natural Philosoph on Thu, 15 May 2014 12:59
		Re: query: how many use PHP for linux scripts By: crankypuss on Thu, 15 May 2014 08:01
		Re: query: how many use PHP for linux scripts By: Chris Ahlstrom on Wed, 14 May 2014 10:40
		Re: query: how many use PHP for linux scripts By: Jerry Stuckle on Wed, 14 May 2014 12:23
		Re: query: how many use PHP for linux scripts By: crankypuss on Wed, 14 May 2014 09:00
		Re: query: how many use PHP for linux scripts By: JEDIDIAH on Wed, 14 May 2014 19:49
		Re: query: how many use PHP for linux scripts By: crankypuss on Wed, 14 May 2014 08:44
		Re: query: how many use PHP for linux scripts By: The Natural Philosoph on Wed, 14 May 2014 09:17
		Re: query: how many use PHP for linux scripts By: crankypuss on Wed, 14 May 2014 09:39
		Re: query: how many use PHP for linux scripts By: Tim Streater on Wed, 14 May 2014 11:29
		Re: query: how many use PHP for linux scripts By: JEDIDIAH on Wed, 14 May 2014 19:54
		Re: query: how many use PHP for linux scripts By: The Natural Philosoph on Wed, 14 May 2014 20:50
		Re: query: how many use PHP for linux scripts By: Jerry Stuckle on Thu, 15 May 2014 02:49
		Re: query: how many use PHP for linux scripts By: JEDIDIAH on Thu, 15 May 2014 14:45
		Re: query: how many use PHP for linux scripts By: The Natural Philosoph on Thu, 15 May 2014 16:35
		Re: query: how many use PHP for linux scripts By: crankypuss on Thu, 15 May 2014 08:07
		Re: query: how many use PHP for linux scripts By: Jonathan N. Little on Thu, 15 May 2014 11:58
		Re: query: how many use PHP for linux scripts By: crankypuss on Thu, 15 May 2014 15:55
		Re: query: how many use PHP for linux scripts By: Jerry Stuckle on Thu, 15 May 2014 12:08
		Re: query: how many use PHP for linux scripts By: crankypuss on Thu, 15 May 2014 16:04
		Re: query: how many use PHP for linux scripts By: The Natural Philosoph on Wed, 14 May 2014 03:42
		Re: query: how many use PHP for linux scripts By: crankypuss on Wed, 14 May 2014 09:21
		Re: query: how many use PHP for linux scripts By: The Natural Philosoph on Wed, 14 May 2014 11:32
		Re: query: how many use PHP for linux scripts By: Ben Bacarisse on Wed, 14 May 2014 12:39
		Re: query: how many use PHP for linux scripts By: The Natural Philosoph on Wed, 14 May 2014 14:23
		Re: query: how many use PHP for linux scripts By: Christoph Michael Bec on Wed, 14 May 2014 18:00
		Re: query: how many use PHP for linux scripts By: The Natural Philosoph on Wed, 14 May 2014 20:48
		Re: query: how many use PHP for linux scripts By: Ben Bacarisse on Wed, 14 May 2014 21:18
		Re: query: how many use PHP for linux scripts By: The Natural Philosoph on Wed, 14 May 2014 22:10
		Re: query: how many use PHP for linux scripts By: Ben Bacarisse on Wed, 14 May 2014 21:05
		Re: query: how many use PHP for linux scripts By: The Natural Philosoph on Wed, 14 May 2014 22:07
		Re: query: how many use PHP for linux scripts By: Jerry Stuckle on Thu, 15 May 2014 02:51
		Re: query: how many use PHP for linux scripts By: Jasen Betts on Thu, 15 May 2014 12:34
		Re: query: how many use PHP for linux scripts By: The Natural Philosoph on Thu, 15 May 2014 13:52
		Re: query: how many use PHP for linux scripts By: crankypuss on Thu, 15 May 2014 16:13
		Re: query: how many use PHP for linux scripts By: The Natural Philosoph on Thu, 15 May 2014 16:48
		Re: query: how many use PHP for linux scripts By: crankypuss on Fri, 16 May 2014 07:12
		Re: query: how many use PHP for linux scripts By: Jasen Betts on Fri, 16 May 2014 11:29
		Re: query: how many use PHP for linux scripts By: The Natural Philosoph on Fri, 16 May 2014 12:03
		PHP integers (was: query: how many use PHP for linux scripts) By: Christoph Michael Bec on Fri, 16 May 2014 12:16
		Re: query: how many use PHP for linux scripts By: Jerry Stuckle on Thu, 15 May 2014 14:03
		Re: query: how many use PHP for linux scripts By: Ben Bacarisse on Thu, 15 May 2014 15:26
		Re: query: how many use PHP for linux scripts By: crankypuss on Thu, 15 May 2014 16:07
		Re: query: how many use PHP for linux scripts By: The Natural Philosoph on Thu, 15 May 2014 16:37
		Re: query: how many use PHP for linux scripts By: Christoph Michael Bec on Thu, 15 May 2014 17:14
		Re: query: how many use PHP for linux scripts By: Ben Bacarisse on Fri, 16 May 2014 01:45
		Re: query: how many use PHP for linux scripts By: The Natural Philosoph on Fri, 16 May 2014 08:25
		Re: query: how many use PHP for linux scripts By: Jerry Stuckle on Fri, 16 May 2014 13:14
		Re: query: how many use PHP for linux scripts By: crankypuss on Fri, 16 May 2014 07:17
		Re: query: how many use PHP for linux scripts By: Thomas 'PointedEars' on Thu, 15 May 2014 17:33
		Re: query: how many use PHP for linux scripts By: crankypuss on Wed, 14 May 2014 08:36
		Re: query: how many use PHP for linux scripts By: The Natural Philosoph on Wed, 14 May 2014 09:09
		Re: query: how many use PHP for linux scripts By: crankypuss on Wed, 14 May 2014 09:58
		Re: query: how many use PHP for linux scripts By: Allodoxaphobia on Tue, 13 May 2014 21:23
		Re: query: how many use PHP for linux scripts By: Mike Yetto on Tue, 13 May 2014 23:02
		Re: query: how many use PHP for linux scripts By: crankypuss on Wed, 14 May 2014 09:24
		Re: query: how many use PHP for linux scripts By: Mike Yetto on Wed, 14 May 2014 21:23
		Re: query: how many use PHP for linux scripts By: Jerry Stuckle on Thu, 15 May 2014 02:53
		Re: query: how many use PHP for linux scripts By: crankypuss on Thu, 15 May 2014 08:13
		Re: query: how many use PHP for linux scripts By: Chris Ahlstrom on Thu, 15 May 2014 10:09
		Re: query: how many use PHP for linux scripts By: crankypuss on Thu, 15 May 2014 16:16
		Re: query: how many use PHP for linux scripts By: Thomas 'PointedEars' on Thu, 15 May 2014 16:49
		Re: query: how many use PHP for linux scripts By: Jasen Betts on Fri, 16 May 2014 12:02
		Re: query: how many use PHP for linux scripts By: crankypuss on Fri, 16 May 2014 14:17
		init-system, bash, etc. (was: query: how many use PHP for linux scripts) By: Christoph Michael Bec on Fri, 16 May 2014 16:48
		Re: query: how many use PHP for linux scripts By: Mike Yetto on Thu, 15 May 2014 12:02
		Re: query: how many use PHP for linux scripts By: Aragorn on Thu, 15 May 2014 01:16
		Re: query: how many use PHP for linux scripts By: crankypuss on Tue, 13 May 2014 18:20
		Re: query: how many use PHP for linux scripts By: Johnny on Tue, 13 May 2014 18:35
		Re: query: how many use PHP for linux scripts By: Mike Yetto on Tue, 13 May 2014 23:04
		Re: query: how many use PHP for linux scripts By: crankypuss on Wed, 14 May 2014 09:26
		Re: query: how many use PHP for linux scripts By: Jerry Stuckle on Wed, 14 May 2014 12:28
		Re: query: how many use PHP for linux scripts By: The Natural Philosoph on Tue, 13 May 2014 16:26

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