Singleton list confusion

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Revision as of 15:46, 10 April 2008 by Lemming (talk | contribs) (further example, but same author)

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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