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x/ramda/source/update.js

:ram: Practical functional Javascript
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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;