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40 lines
1.2 KiB
40 lines
1.2 KiB
var baseToPath = require('./_baseToPath'),
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isArguments = require('./isArguments'),
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isArray = require('./isArray'),
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isIndex = require('./_isIndex'),
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isKey = require('./_isKey'),
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isLength = require('./isLength'),
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isString = require('./isString'),
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last = require('./last'),
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parent = require('./_parent');
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/**
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* Checks if `path` exists on `object`.
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*
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* @private
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* @param {Object} object The object to query.
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* @param {Array|string} path The path to check.
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* @param {Function} hasFunc The function to check properties.
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* @returns {boolean} Returns `true` if `path` exists, else `false`.
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*/
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function hasPath(object, path, hasFunc) {
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if (object == null) {
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return false;
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}
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var result = hasFunc(object, path);
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if (!result && !isKey(path)) {
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path = baseToPath(path);
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object = parent(object, path);
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if (object != null) {
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path = last(path);
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result = hasFunc(object, path);
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}
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}
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var length = object ? object.length : undefined;
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return result || (
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!!length && isLength(length) && isIndex(path, length) &&
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(isArray(object) || isString(object) || isArguments(object))
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);
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}
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module.exports = hasPath;
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