68 lines
1.9 KiB
JavaScript
Executable File
68 lines
1.9 KiB
JavaScript
Executable File
var SetCache = require('./_SetCache'),
|
|
arrayIncludes = require('./_arrayIncludes'),
|
|
arrayIncludesWith = require('./_arrayIncludesWith'),
|
|
arrayMap = require('./_arrayMap'),
|
|
baseUnary = require('./_baseUnary'),
|
|
cacheHas = require('./_cacheHas');
|
|
|
|
/** Used as the size to enable large array optimizations. */
|
|
var LARGE_ARRAY_SIZE = 200;
|
|
|
|
/**
|
|
* The base implementation of methods like `_.difference` without support
|
|
* for excluding multiple arrays or iteratee shorthands.
|
|
*
|
|
* @private
|
|
* @param {Array} array The array to inspect.
|
|
* @param {Array} values The values to exclude.
|
|
* @param {Function} [iteratee] The iteratee invoked per element.
|
|
* @param {Function} [comparator] The comparator invoked per element.
|
|
* @returns {Array} Returns the new array of filtered values.
|
|
*/
|
|
function baseDifference(array, values, iteratee, comparator) {
|
|
var index = -1,
|
|
includes = arrayIncludes,
|
|
isCommon = true,
|
|
length = array.length,
|
|
result = [],
|
|
valuesLength = values.length;
|
|
|
|
if (!length) {
|
|
return result;
|
|
}
|
|
if (iteratee) {
|
|
values = arrayMap(values, baseUnary(iteratee));
|
|
}
|
|
if (comparator) {
|
|
includes = arrayIncludesWith;
|
|
isCommon = false;
|
|
}
|
|
else if (values.length >= LARGE_ARRAY_SIZE) {
|
|
includes = cacheHas;
|
|
isCommon = false;
|
|
values = new SetCache(values);
|
|
}
|
|
outer:
|
|
while (++index < length) {
|
|
var value = array[index],
|
|
computed = iteratee == null ? value : iteratee(value);
|
|
|
|
value = (comparator || value !== 0) ? value : 0;
|
|
if (isCommon && computed === computed) {
|
|
var valuesIndex = valuesLength;
|
|
while (valuesIndex--) {
|
|
if (values[valuesIndex] === computed) {
|
|
continue outer;
|
|
}
|
|
}
|
|
result.push(value);
|
|
}
|
|
else if (!includes(values, computed, comparator)) {
|
|
result.push(value);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
module.exports = baseDifference;
|