| var baseSlice = require('./baseSlice'); |
| |
| /** |
| * The base implementation of `_.dropRightWhile`, `_.dropWhile`, `_.takeRightWhile`, |
| * and `_.takeWhile` without support for callback shorthands and `this` binding. |
| * |
| * @private |
| * @param {Array} array The array to query. |
| * @param {Function} predicate The function invoked per iteration. |
| * @param {boolean} [isDrop] Specify dropping elements instead of taking them. |
| * @param {boolean} [fromRight] Specify iterating from right to left. |
| * @returns {Array} Returns the slice of `array`. |
| */ |
| function baseWhile(array, predicate, isDrop, fromRight) { |
| var length = array.length, |
| index = fromRight ? length : -1; |
| |
| while ((fromRight ? index-- : ++index < length) && predicate(array[index], index, array)) {} |
| return isDrop |
| ? baseSlice(array, (fromRight ? 0 : index), (fromRight ? index + 1 : length)) |
| : baseSlice(array, (fromRight ? index + 1 : 0), (fromRight ? length : index)); |
| } |
| |
| module.exports = baseWhile; |