dtipson
/ IO plus Array & Promise helpers.js
Last active
October 1, 2019 07:56
Bare bones FP type utility lib so we can play around with functions that capture the composition of DOM read/writes, but in a pure way
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| // Let's make it possible to create pure functions even when we're | |
| // dealing with impure operations that would have side effects! | |
| // First we'll need a "Type" that can contain a (sometimes impure) function | |
| function IO(fn) { | |
| if (!(this instanceof IO)) {//make it simpler for end users to create a type without "new" | |
| return new IO(fn); | |
| } | |
| this.runIO = fn;//IO now provides an extra control layer that allows the composition of unexecuted effects |