1 | var baseSlice = require('./_baseSlice');
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2 |
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3 | /**
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4 | * The base implementation of methods like `_.dropWhile` and `_.takeWhile`
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5 | * without support for iteratee shorthands.
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6 | *
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7 | * @private
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8 | * @param {Array} array The array to query.
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9 | * @param {Function} predicate The function invoked per iteration.
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10 | * @param {boolean} [isDrop] Specify dropping elements instead of taking them.
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11 | * @param {boolean} [fromRight] Specify iterating from right to left.
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12 | * @returns {Array} Returns the slice of `array`.
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13 | */
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14 | function baseWhile(array, predicate, isDrop, fromRight) {
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15 | var length = array.length,
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16 | index = fromRight ? length : -1;
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17 |
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18 | while ((fromRight ? index-- : ++index < length) &&
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19 | predicate(array[index], index, array)) {}
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20 |
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21 | return isDrop
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22 | ? baseSlice(array, (fromRight ? 0 : index), (fromRight ? index + 1 : length))
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23 | : baseSlice(array, (fromRight ? index + 1 : 0), (fromRight ? length : index));
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24 | }
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25 |
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26 | module.exports = baseWhile;
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