'use strict'
|
var testValue = require('test-value')
|
|
/**
|
* @module reduce-extract
|
*/
|
module.exports = extract
|
|
/**
|
Removes items from `array` which satisfy the query. Modifies the input array, returns the extracted.
|
|
@param {Array} - the input array, modified directly
|
@param {any} - if an item in the input array passes this test it is removed
|
@alias module:reduce-extract
|
@example
|
> DJs = [
|
{ name: "Trevor", sacked: true },
|
{ name: "Mike", sacked: true },
|
{ name: "Chris", sacked: false },
|
{ name: "Alan", sacked: false }
|
]
|
|
> a.extract(DJs, { sacked: true })
|
[ { name: 'Trevor', sacked: true },
|
{ name: 'Mike', sacked: true } ]
|
|
> DJs
|
[ { name: 'Chris', sacked: false },
|
{ name: 'Alan', sacked: false } ]
|
|
*/
|
function extract (query) {
|
var toSplice = []
|
var extracted = []
|
return function (prev, curr, index, array) {
|
if (prev !== extracted) {
|
if (testValue(prev, query)) {
|
extracted.push(prev)
|
toSplice.push(index - 1)
|
}
|
}
|
|
if (testValue(curr, query)) {
|
extracted.push(curr)
|
toSplice.push(index)
|
}
|
|
if (index === array.length - 1) {
|
toSplice.reverse()
|
for (var i = 0; i < toSplice.length; i++) {
|
array.splice(toSplice[i], 1)
|
}
|
}
|
return extracted
|
}
|
}
|
