Side effects can create bugs that might take days to detect, and thus are a big no-no in the world of functional programming. The following JavaScript code violates this principle because it ...

The trick to effective functional programming with JavaScript is to think like a functional programmer. This means writing pure functions that are deterministic, referentially transparent and create ...

Functional programming is sometimes defined in opposition ... This is a way of avoiding side effects. It makes it easier to reason about the effects of the function as it operates within the ...

"Functional programming languages don't have side effects," he says. "The computational fabric is inherently parallel - if anything you have to do some work to sequentialise it. For the parallel ...

So, what are functional programming languages? At the core ... Functional languages also avoid ‘side effects’. That is, if you pass a value into a function it will not be changed and the function will ...