Re: [Haskell-beginners] Beginners Digest, Vol 89, Issue 38 How to define a simple function

Dear sirs:I am defining a function halve, that breaks a list in two halfs. But I always get an error. Below is my code. What am I doing wrong?Thanks!halve xs = [take (floor (longitud/2)), drop (floor (longitud/2))]  where longitud = length xs From: "beginners-request@haskell.org" To: beginners@haskell.org Sent: Saturday, November 21, 2015 8:21 PM Subject: Beginners Digest, Vol 89, Issue 38 Send Beginners mailing list submissions to     beginners@haskell.org To subscribe or unsubscribe via the World Wide Web, visit     http://mail.haskell.org/cgi-bin/mailman/listinfo/beginners or, via email, send a message with subject or body 'help' to     beginners-request@haskell.org You can reach the person managing the list at     beginners-owner@haskell.org When replying, please edit your Subject line so it is more specific than "Re: Contents of Beginners digest..." Today's Topics:   1. Re:  Warning: Tab Character (Dan Stromberg)   2. Re:  Warning: Tab Character (Jeon-Young Kang)   3. Re:  Warning: Tab Character (Thomas Jakway) ---------------------------------------------------------------------- Message: 1 Date: Sat, 21 Nov 2015 16:44:21 -0800 From: Dan Stromberg To: The Haskell-Beginners Mailing List - Discussion of primarily     beginner-level topics related to Haskell Subject: Re: [Haskell-beginners] Warning: Tab Character Message-ID:     Content-Type: text/plain; charset="utf-8" I believe the first version of make required tabs, but some subsequent versions have relaxed that requirement to make things easier. Here's an example on a Linux Mint system (the 20's are of course spaces) : $ od -cx < Makefile cmd output started 2015 Sat Nov 21 04:39:47 PM PST 0000000  \n  g  o  :  \n                  .  /  t  \n  \n           670a    3a6f    200a    2020    2e20    742f    0a0a 0000016 above cmd output done    2015 Sat Nov 21 04:39:47 PM PST dstromberg@dell-inspiron:/var/tmp/make-tabs i686-pc-linux-gnu 25234 $ make cmd output started 2015 Sat Nov 21 04:39:48 PM PST Makefile:3: *** missing separator.  Stop. above cmd output done    2015 Sat Nov 21 04:39:48 PM PST dstromberg@dell-inspiron:/var/tmp/make-tabs i686-pc-linux-gnu 25234 $ make --version cmd output started 2015 Sat Nov 21 04:39:53 PM PST GNU Make 3.81 Copyright (C) 2006  Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. This program built for i686-pc-linux-gnu above cmd output done    2015 Sat Nov 21 04:39:53 PM PST dstromberg@dell-inspiron:/var/tmp/make-tabs i686-pc-linux-gnu 25234 I'll add that vim's Makefile syntax highlighting puts the space-indented line in red, suggesting an error.  Changing the spaces to a single tab makes the red go away. HTH On Sat, Nov 21, 2015 at 3:34 PM, Thomas Jakway wrote:

Why would make require tabs...? Admittedly it's been a long time since I've written any makefiles by hand but I always use spaces instead of tabs and have never had any problems.

On Nov 21, 2015 6:01 PM, David Moberg wrote:

...

Have you found "soft tabs"? That option will make TextMate use spaces

instead of tab characters. Read 4.11 "Using Spaces Instead of Tabs" in Dan Strombergs link for instrucitons.

...

2015-11-21 21:36 GMT+01:00 Jeon-Young Kang :

...

I've tried to choose "instead of spaces". But there is no option of

mine (Textmate 2 beta).

...

...

On Sat, Nov 21, 2015 at 3:14 PM, Dan Stromberg

wrote:

...

...

Perhaps enable soft tabs? https://manual.macromates.com/en/working_with_text

This is an issue in Python too (at least from PEP8's perspective) -

but note that many "make" programs require tabs instead of spaces.

...

On Sat, Nov 21, 2015 at 11:13 AM, Jeon-Young Kang

wrote:

...

...

Hello everyone.

I am a newbie of Haskell, using Textmate on mac.

I got the following warning. How can I fix it?

Warning:

    Tab character

Ok, modules loaded: Main.

Sincerely, Young

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jykang22@gmail.com

Jeon-Young Kang

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