cond-flow

Inspired by Elixir's cond this is a simpler alternative to lodash's _.cond


Install

Install with npm or yarn via

``sh
yarn add cond-flow
`

or

`sh
npm i cond-flow
`

Usage

`js
import cond from 'cond-flow'

const value = cond([
[false, 'false'],
[true, 'true'],
[true, 'true but too late'],
])

// value === 'true'
`

Also works nicely with React components as you can have the values lazily evaluated by wrapping them in a function:

`jsx
import cond from 'cond-flow'

const Component = ({ isDisabled, isNew, isLoading }) => (
<>
{cond([
[isLoading, () => ],
[isNew, () => ],
[isDisabled, null],
])}

)
`

$3

You can provide a default fallback which will be returned if no provided conditions are met.

`js
import cond from 'cond-flow'

const value = cond(
[
[false, () => 'false'],
[false, () => 'also false'],
],
{ default: () => 'fallback' },
)

// value === 'fallback'
`

$3

As all predicates have to be evaluated before the right branch can be chosen, it can have a negative performance impact if you rely on heavy computations. It's best to have simple booleans and resort to Ramda's cond` for complex use cases.

Development

If you find this useful or would like to add features, feel free to clone the repository and open a PR.