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A comment on Why do our programs need to read input and write output?. Parent comment

Re:Why do our programs need to read input and write output? by tree_of_item on Sunday October 08, 2017 @03:13PM (#15429478)
It achieves the goal of making your code side-effect free. The explicit goal of these sorts of projects is to push the side-effects to the very edge of the stack.
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