lazy-concat
Lazily concat two arrays and exclude duplicate items at the joint, especially for sequential arrays.
Install
$ npm install lazy-concat
Usage
// 2 of the second array matches the second position of the first array// concat([1, 2, 3], [2, 3, 9]) -> [1, 2, 3, 9]// 9 matches the last item of the previously concat item// -> [1, 2, 3, 9]// 10 does not match,// so the result is [1, 2, 3, 9, 10] const concat2 = concat // [{i: 1}, {i: 2}, {i: 3}] // 1 of the second array matches the first item of the first array,// but the match is too deep// which is deeper than the length of the second array.// So the match will be rejected.// And the result is `[1, 2, 3, 1, 9]` // it will throw
concat(...items)
- items
Array<any>
the first item should not benull
orundefined
, or it will throw an error.
Returns Array
concat.factory({equal})
- equal
Function
the method to match items, by default:
const equal = a === b
Returns Function
the configured concat
function.
License
MIT