42 lines
No EOL
1.4 KiB
JavaScript
42 lines
No EOL
1.4 KiB
JavaScript
import _curry2 from "./internal/_curry2.js";
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import _isArray from "./internal/_isArray.js";
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import _map from "./internal/_map.js";
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import _assoc from "./internal/_assoc.js";
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/**
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*
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* Deconstructs an array field from the input documents to output a document for each element.
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* Each output document is the input document with the value of the array field replaced by the element.
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*
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* @func
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* @memberOf R
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* @since v0.28.0
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* @category Object
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* @sig String -> {k: [v]} -> [{k: v}]
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* @param {String} key The key to determine which property of the object should be unwound.
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* @param {Object} object The object containing the list to unwind at the property named by the key.
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* @return {List} A list of new objects, each having the given key associated to an item from the unwound list.
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* @example
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*
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* R.unwind('hobbies', {
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* name: 'alice',
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* hobbies: ['Golf', 'Hacking'],
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* colors: ['red', 'green'],
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* });
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* // [
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* // { name: 'alice', hobbies: 'Golf', colors: ['red', 'green'] },
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* // { name: 'alice', hobbies: 'Hacking', colors: ['red', 'green'] }
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* // ]
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*/
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var unwind = /*#__PURE__*/_curry2(function (key, object) {
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// If key is not in object or key is not as a list in object
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if (!(key in object && _isArray(object[key]))) {
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return [object];
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}
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// Map over object[key] which is a list and assoc each element with key
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return _map(function (item) {
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return _assoc(key, item, object);
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}, object[key]);
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});
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export default unwind; |