Difference between revisions of "Singleton list confusion"
From HaskellWiki
(short introduction) |
(further example, but same author) |
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People sometimes write argument patterns like <hask>[x]</hask>, hoping that <hask>x</hask> will assume all values of a list successively. | People sometimes write argument patterns like <hask>[x]</hask>, hoping that <hask>x</hask> will assume all values of a list successively. | ||
Maybe it is some kind of [[list comprehension]]. | Maybe it is some kind of [[list comprehension]]. | ||
| + | <!-- the first time I saw this in students homework solutions --> | ||
See for example | See for example | ||
| − | Haskell-Cafe about [http://www.haskell.org/pipermail/haskell-cafe/2008-April/041556.html Pattern match failure] | + | Haskell-Cafe about |
| + | [http://www.haskell.org/pipermail/haskell-cafe/2008-April/041496.html testing for same characters in lists of strings], | ||
| + | [http://www.haskell.org/pipermail/haskell-cafe/2008-April/041556.html Pattern match failure] | ||
[[Category:Syntax]] | [[Category:Syntax]] | ||
Revision as of 15:46, 10 April 2008
Why do Haskell newcomers frequently believe, that list variables must be enclosed in brackets?
People sometimes write argument patterns like [x], hoping that x will assume all values of a list successively.
Maybe it is some kind of list comprehension.
See for example Haskell-Cafe about
testing for same characters in lists of strings, Pattern match failure