compose - nodef/extra-function GitHub Wiki

Compose functions together, in applicative order.

Alternatives: compose, composeRight.

function compose(...xs)
// xs: functions (f, g)

const xfunction = require('extra-function');


var fn = xfunction.compose(Math.sqrt, Math.abs);
fn(-64);  // Math.sqrt(Math.abs(-64))
// → 8

var fn = xfunction.compose(Math.sqrt, Math.min);
fn(22, 9);  // Math.sqrt(Math.min(22, 9))
// → 3

References

• compose: Underscore.js documentation
• Function composition
• Learn You a Haskell for Great Good!: Higher order functions by Miran Lipovaca
• Haskell composition (.) vs F#'s pipe forward operator (|>)
• compose-function package by Christoph Hermann