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Re: Re: Threading 'Append'

• To: mathgroup at smc.vnet.net
• Subject: [mg62849] Re: [mg62834] Re: [mg62796] Threading 'Append'
• From: Pratik Desai <pdesai1 at umbc.edu>
• Date: Tue, 6 Dec 2005 23:10:20 -0500 (EST)
• References: <200512051840.NAA21108@smc.vnet.net> <200512060504.AAA02838@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

Andrzej Kozlowski wrote:

>On 6 Dec 2005, at 03:40, J Siehler wrote:
>
>  
>
>>If I run
>>
>>Thread[Append[{{1,2},{3,4},{5,6}},{a,b,c}]]
>>
>>I would expect to get
>>
>>{{1,2,a},{3,4,b},{5,6,c}}
>>
>>but in fact I get an 'Objects of unequal length' error.
>>
>>On the other hand,
>>
>>Thread[foo[{{1,2},{3,4},{5,6}},{a,b,c}]]
>>%/.foo->Append
>>
>>gives what I wanted.  Can someone explain what's going on?
>>
>>    
>>
>
>All you need to do is:
>
>In[9]:=
>Thread[Unevaluated[Append[{{1, 2}, {3, 4}, {5, 6}},
>     {a, b, c}]]]
>
>Out[9]=
>{{1, 2, a}, {3, 4, b}, {5, 6, c}}
>
>
>The name of the function "Unevaluated" should make it self evident  
>what happened here (I hope).
>  
>
Actually it is not. Can you please elaborate

Pratik

>Andrzej Kozlowski
>
>  
>

• Follow-Ups:
  • Re: Re: Re: Threading 'Append'
    • From: Andrzej Kozlowski <akoz@mimuw.edu.pl>

• References:
  • Threading 'Append'
    • From: "J Siehler" <jsiehler@Gmail.com>
  • Re: Threading 'Append'
    • From: Andrzej Kozlowski <akoz@mimuw.edu.pl>