46 lines
1.1 KiB
JavaScript
46 lines
1.1 KiB
JavaScript
import _objectAssign from "./_objectAssign.js";
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import _identity from "./_identity.js";
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import _isArrayLike from "./_isArrayLike.js";
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import _isTransformer from "./_isTransformer.js";
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import objOf from "../objOf.js";
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var _stepCatArray = {
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'@@transducer/init': Array,
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'@@transducer/step': function (xs, x) {
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xs.push(x);
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return xs;
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},
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'@@transducer/result': _identity
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};
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var _stepCatString = {
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'@@transducer/init': String,
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'@@transducer/step': function (a, b) {
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return a + b;
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},
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'@@transducer/result': _identity
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};
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var _stepCatObject = {
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'@@transducer/init': Object,
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'@@transducer/step': function (result, input) {
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return _objectAssign(result, _isArrayLike(input) ? objOf(input[0], input[1]) : input);
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},
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'@@transducer/result': _identity
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};
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export default function _stepCat(obj) {
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if (_isTransformer(obj)) {
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return obj;
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}
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if (_isArrayLike(obj)) {
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return _stepCatArray;
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}
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if (typeof obj === 'string') {
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return _stepCatString;
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}
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if (typeof obj === 'object') {
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return _stepCatObject;
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}
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throw new Error('Cannot create transformer for ' + obj);
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} |