When you want array.some but not array.every. Useful when you need to determine partially selected states - like partially selecting tree nodes when some but not all child nodes are checked.
npm install array.partialarray.some will also return true when array.every returns true.
array.partial is something in between. It returns true only, and only when _some_ (but not all) elements match. If all elements match, then it'll return false.
array.some && !array.every if you don't mind iterating over the array twice. This module does it with one iteration over the array.
npm install array.partial
`
Usage
`
const partial = require('array.partial')
partial(array, predicate)
`
API
$3
Return true if and only if some elements pass the check, otherwise false.
#### array
Type: Array - Input array
#### predicate
Type: Function - A predicate, to test each element of the array. This is called with the following arguments:
element - The current element being processed in the array
index (Optional) - The index of the current element being processed in the array.
array (Optional) - The array filter was called upon.
Examples
`
const partial = require('array.partial')
const myArr = [{id: 'a1', checked: true}, {id: 'a2', checked: false}]
partial(myArr, x => x.checked) // -> returns true
// ...
const myArr = [{id: 'a1', checked: true}, {id: 'a2', checked: true}]
partial(myArr, x => x.checked) // -> returns false
// ...
const myArr = [{id: 'a1', checked: false}, {id: 'a2', checked: false}]
partial(myArr, x => x.checked) // -> returns false
``