[Haskell-cafe] Substituting values

[Radical]

Sometimes I'll need something like:

  if value == Foo then Bar else value

Or some syntactic variation thereof:

  case value of { Foo -> Bar; _ -> value }

Is there a better/shorter way to do it? I'm surprised that it's more
complicated to substitute a value on its own than e.g. in a list, using
filter. Or perhaps I'm missing the right abstraction?

Thanks,

Alvaro
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