1 | var _isArray =
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2 | /*#__PURE__*/
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3 | require("./_isArray");
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4 |
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5 | var _isTransformer =
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6 | /*#__PURE__*/
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7 | require("./_isTransformer");
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8 | /**
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9 | * Returns a function that dispatches with different strategies based on the
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10 | * object in list position (last argument). If it is an array, executes [fn].
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11 | * Otherwise, if it has a function with one of the given method names, it will
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12 | * execute that function (functor case). Otherwise, if it is a transformer,
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13 | * uses transducer [xf] to return a new transformer (transducer case).
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14 | * Otherwise, it will default to executing [fn].
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15 | *
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16 | * @private
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17 | * @param {Array} methodNames properties to check for a custom implementation
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18 | * @param {Function} xf transducer to initialize if object is transformer
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19 | * @param {Function} fn default ramda implementation
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20 | * @return {Function} A function that dispatches on object in list position
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21 | */
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22 |
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23 |
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24 | function _dispatchable(methodNames, xf, fn) {
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25 | return function () {
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26 | if (arguments.length === 0) {
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27 | return fn();
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28 | }
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29 |
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30 | var args = Array.prototype.slice.call(arguments, 0);
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31 | var obj = args.pop();
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32 |
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33 | if (!_isArray(obj)) {
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34 | var idx = 0;
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35 |
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36 | while (idx < methodNames.length) {
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37 | if (typeof obj[methodNames[idx]] === 'function') {
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38 | return obj[methodNames[idx]].apply(obj, args);
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39 | }
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40 |
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41 | idx += 1;
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42 | }
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43 |
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44 | if (_isTransformer(obj)) {
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45 | var transducer = xf.apply(null, args);
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46 | return transducer(obj);
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47 | }
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48 | }
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49 |
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50 | return fn.apply(this, arguments);
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51 | };
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52 | }
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53 |
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54 | module.exports = _dispatchable; |
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