1 | var castPath = require('./_castPath'),
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2 | isArguments = require('./isArguments'),
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3 | isArray = require('./isArray'),
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4 | isIndex = require('./_isIndex'),
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5 | isLength = require('./isLength'),
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6 | toKey = require('./_toKey');
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7 |
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8 | /**
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9 | * Checks if `path` exists on `object`.
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10 | *
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11 | * @private
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12 | * @param {Object} object The object to query.
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13 | * @param {Array|string} path The path to check.
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14 | * @param {Function} hasFunc The function to check properties.
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15 | * @returns {boolean} Returns `true` if `path` exists, else `false`.
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16 | */
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17 | function hasPath(object, path, hasFunc) {
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18 | path = castPath(path, object);
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19 |
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20 | var index = -1,
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21 | length = path.length,
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22 | result = false;
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23 |
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24 | while (++index < length) {
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25 | var key = toKey(path[index]);
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26 | if (!(result = object != null && hasFunc(object, key))) {
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27 | break;
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28 | }
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29 | object = object[key];
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30 | }
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31 | if (result || ++index != length) {
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32 | return result;
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33 | }
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34 | length = object == null ? 0 : object.length;
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35 | return !!length && isLength(length) && isIndex(key, length) &&
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36 | (isArray(object) || isArguments(object));
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37 | }
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38 |
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39 | module.exports = hasPath;
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