ioref – Tarik Billa

When is it OK to use an IORef?

March 10, 2023 by Tarik

State and its relative ST both produce `monolithic’ stateful computations which may be run as units. They basically treat the mutable state as intermediate data, which is needed to produce a result, but should not, in and of itself, be of interest to the rest of the programme. On the other hand, what one puts … Read more

Difference between State, ST, IORef, and MVar

January 9, 2023 by Tarik

The State Monad : a model of mutable state The State monad is a purely functional environment for programs with state, with a simple API: get put Documentation in the mtl package. The State monad is commonly used when needing state in a single thread of control. It doesn’t actually use mutable state in its … Read more

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