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41 lines
1.3 KiB
TypeScript
41 lines
1.3 KiB
TypeScript
// Loaded from https://deno.land/x/ramda@v0.27.2/source/move.js
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import _curry3 from './internal/_curry3.js';
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/**
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* Move an item, at index `from`, to index `to`, in a list of elements.
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* A new list will be created containing the new elements order.
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*
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* @func
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* @memberOf R
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* @since v0.27.1
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* @category List
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* @sig Number -> Number -> [a] -> [a]
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* @param {Number} from The source index
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* @param {Number} to The destination index
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* @param {Array} list The list which will serve to realise the move
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* @return {Array} The new list reordered
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* @example
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*
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* R.move(0, 2, ['a', 'b', 'c', 'd', 'e', 'f']); //=> ['b', 'c', 'a', 'd', 'e', 'f']
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* R.move(-1, 0, ['a', 'b', 'c', 'd', 'e', 'f']); //=> ['f', 'a', 'b', 'c', 'd', 'e'] list rotation
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*/
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var move = _curry3(function(from, to, list) {
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var length = list.length;
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var result = list.slice();
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var positiveFrom = from < 0 ? length + from : from;
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var positiveTo = to < 0 ? length + to : to;
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var item = result.splice(positiveFrom, 1);
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return positiveFrom < 0 || positiveFrom >= list.length
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|| positiveTo < 0 || positiveTo >= list.length
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? list
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: []
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.concat(result.slice(0, positiveTo))
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.concat(item)
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.concat(result.slice(positiveTo, list.length));
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});
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export default move;
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