tail and head

[cnb]

why cant i do head([1,2,3]). or head [1,2,3]. ?

head and tail aren't real commands just abstract ones so I always have to do the following?
[A:B]=[1,2,3].
A.
1
B.
[2,3]

---

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[Vlad Dumitrescu-2]

Hi,

You can, it's only that 'head' is actually called 'hd' and 'tail' is 'tl'.

hd([1,2,3])
1

regards,
Vlad

2008/7/22 Circular Function <circularfunc@...>:

why cant i do head([1,2,3]). or head [1,2,3]. ?

head and tail aren't real commands just abstract ones so I always have to do the following?
[A:B]=[1,2,3].
A.
1
B.
[2,3]

---

Ta semester! - sök efter resor hos Kelkoo.
Jämför pris på flygbiljetter och hotellrum: http://www.kelkoo.se/c-169901-resor-biljetter.html

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erlang-questions mailing list
erlang-questions@...
http://www.erlang.org/mailman/listinfo/erlang-questions

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[Christian S-2]

The names of the functions are erlang:hd/1 and erlang:tl/1

And yes, "[A|B] = List." is another way to deconstruct a list.

2008/7/22 Circular Function <circularfunc@...>:
> why cant i do head([1,2,3]). or head [1,2,3]. ?
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