import isBoolean from './isBoolean.js';
import cb from './_cb.js';
import getLength from './_getLength.js';
import contains from './contains.js';import isBoolean from './isBoolean.js';
import cb from './_cb.js';
import getLength from './_getLength.js';
import contains from './contains.js';Produce a duplicate-free version of the array. If the array has already been sorted, you have the option of using a faster algorithm. The faster algorithm will not work with an iteratee if the iteratee is not a one-to-one function, so providing an iteratee will disable the faster algorithm.
export default function uniq(array, isSorted, iteratee, context) {
if (!isBoolean(isSorted)) {
context = iteratee;
iteratee = isSorted;
isSorted = false;
}
if (iteratee != null) iteratee = cb(iteratee, context);
var result = [];
var seen = [];
for (var i = 0, length = getLength(array); i < length; i++) {
var value = array[i],
computed = iteratee ? iteratee(value, i, array) : value;
if (isSorted && !iteratee) {
if (!i || seen !== computed) result.push(value);
seen = computed;
} else if (iteratee) {
if (!contains(seen, computed)) {
seen.push(computed);
result.push(value);
}
} else if (!contains(result, value)) {
result.push(value);
}
}
return result;
}