All files / reverse-dimensions/lib main.js

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/**
* @license Apache-2.0
*
* Copyright (c) 2026 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*    http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
 
'use strict';
 
// MODULES //
 
var isIntegerArray = require( '@stdlib/assert/is-integer-array' ).primitives;
var isndarrayLike = require( '@stdlib/assert/is-ndarray-like' );
var base = require( '@stdlib/ndarray/base/reverse-dimensions' );
var format = require( '@stdlib/string/format' );
 
 
// MAIN //
 
/**
* Returns a read-only view of an input ndarray in which the order of elements along specified dimensions is reversed.
*
* @param {ndarray} x - input array
* @param {IntegerArray} dims - indices of dimensions to reverse
* @throws {TypeError} first argument must be an ndarray having one or more dimensions
* @throws {TypeError} second argument must be an array of integers
* @throws {RangeError} dimension index exceeds the number of dimensions
* @throws {Error} must provide unique dimension indices
* @returns {ndarray} ndarray view
*
* @example
* var array = require( '@stdlib/ndarray/array' );
*
* var x = array( [ [ 1.0, 2.0 ], [ 3.0, 4.0 ], [ 5.0, 6.0 ] ] );
* // returns <ndarray>[ [ 1.0, 2.0 ], [ 3.0, 4.0 ], [ 5.0, 6.0 ] ]
*
* var y = reverseDimensions( x, [ 0, 1 ] );
* // returns <ndarray>[ [ 6.0, 5.0 ], [ 4.0, 3.0 ], [ 2.0, 1.0 ] ]
*/
function reverseDimensions( x, dims ) {
	if ( !isndarrayLike( x ) ) {
		throw new TypeError( format( 'invalid argument. First argument must be an ndarray. Value: `%s`.', x ) );
	}
	if ( !isIntegerArray( dims ) ) {
		throw new TypeError( format( 'invalid argument. Second argument must be an array of integers. Value: `%s`.', dims ) );
	}
	return base( x, dims, false );
}
 
 
// EXPORTS //
 
module.exports = reverseDimensions;