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47 lines
1.1 KiB
TypeScript
47 lines
1.1 KiB
TypeScript
// Loaded from https://deno.land/x/ramda@v0.27.2/source/invert.js
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import _curry1 from './internal/_curry1.js';
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import _has from './internal/_has.js';
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import keys from './keys.js';
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/**
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* Same as [`R.invertObj`](#invertObj), however this accounts for objects with
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* duplicate values by putting the values into an array.
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*
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* @func
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* @memberOf R
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* @since v0.9.0
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* @category Object
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* @sig {s: x} -> {x: [ s, ... ]}
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* @param {Object} obj The object or array to invert
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* @return {Object} out A new object with keys in an array.
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* @see R.invertObj
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* @example
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*
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* const raceResultsByFirstName = {
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* first: 'alice',
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* second: 'jake',
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* third: 'alice',
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* };
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* R.invert(raceResultsByFirstName);
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* //=> { 'alice': ['first', 'third'], 'jake':['second'] }
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*/
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var invert = _curry1(function invert(obj) {
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var props = keys(obj);
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var len = props.length;
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var idx = 0;
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var out = {};
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while (idx < len) {
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var key = props[idx];
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var val = obj[key];
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var list = _has(val, out) ? out[val] : (out[val] = []);
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list[list.length] = key;
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idx += 1;
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}
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return out;
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});
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export default invert;
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