This is a matter that I genuinely at the present time do not grasp and I am
hoping that some of you who are more familiar with the Haskell language may be
able to help enlighten me. I feel the question to be an important one. What
material benefit does Haskell derive from being a "pure" functional language as
opposed to an impure one? Please provide examples as I require instruction.
The following is what I believe to be true at the present time. It seems to be
that the decision was made because it was a matter of taste under the belief
that computer scientists can and often are superstitious and their
superstitions can and often do materially interfere with progress. What I am
saying is that at the present time perhaps due to my ignorance I am unfamiliar
with how this benefits the language in a material sense. It appears to be a
philosophical matter, a matter of identity, what Haskell stands for.
The sort of decision that Apple computer and Microsoft made not to go down the
POSIX road seems relevant. Historically, Apple did not embrace POSIX. Windows
continues to stand for Windows, that is the graphical user interface.
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