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update.js
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/
update.js
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import _curry3 from './internal/_curry3.js';
import adjust from './adjust.js';
import always from './always.js';
/**
* Returns a new copy of the array with the element at the provided index
* replaced with the given value.
*
* @func
* @memberOf R
* @since v0.14.0
* @category List
* @sig Number -> a -> [a] -> [a]
* @param {Number} idx The index to update.
* @param {*} x The value to exist at the given index of the returned array.
* @param {Array|Arguments} list The source array-like object to be updated.
* @return {Array} A copy of `list` with the value at index `idx` replaced with `x`.
* @see R.adjust
* @example
*
* R.update(1, '_', ['a', 'b', 'c']); //=> ['a', '_', 'c']
* R.update(-1, '_', ['a', 'b', 'c']); //=> ['a', 'b', '_']
* @symb R.update(-1, a, [b, c]) = [b, a]
* @symb R.update(0, a, [b, c]) = [a, c]
* @symb R.update(1, a, [b, c]) = [b, a]
*/
var update = _curry3(function update(idx, x, list) {
return adjust(idx, always(x), list);
});
export default update;