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* @license Apache-2.0
*
* Copyright (c) 2025 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 ndims = require( '@stdlib/ndarray/base/ndims' );
var normalizeIndex = require( '@stdlib/ndarray/base/normalize-index' );
var getShape = require( '@stdlib/ndarray/base/shape' );
var sliceFrom = require( '@stdlib/ndarray/base/slice-from' );
var sliceTo = require( '@stdlib/ndarray/base/slice-to' );
// MAIN //
/**
* Returns an array containing a truncated view of an input ndarray and a complementary view of the last element(s) along a specified dimension.
*
* @param {ndarray} x - input array
* @param {integer} dim - dimension along which to perform the operation
* @param {boolean} strict - boolean indicating whether to enforce strict bounds checking
* @param {boolean} writable - boolean indicating whether returned arrays should be writable
* @returns {Array} a list of ndarrays
*
* @example
* var ndarray = require( '@stdlib/ndarray/ctor' );
* var ndarray2array = require( '@stdlib/ndarray/to-array' );
*
* var buffer = [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 ];
* var shape = [ 3, 2 ];
* var strides = [ 2, 1 ];
* var offset = 0;
*
* var x = ndarray( 'generic', buffer, shape, strides, offset, 'row-major' );
* // returns <ndarray>
*
* var arr = ndarray2array( x );
* // returns [ [ 1.0, 2.0 ], [ 3.0, 4.0 ], [ 5.0, 6.0 ] ]
*
* var y = pop( x, 0, false, false );
* // returns [ <ndarray>, <ndarray> ]
*
* arr = ndarray2array( y[ 0 ] );
* // returns [ [ 1.0, 2.0 ], [ 3.0, 4.0 ] ]
*
* arr = ndarray2array( y[ 1 ] );
* // returns [ [ 5.0, 6.0 ] ]
*/
function pop( x, dim, strict, writable ) {
var v0;
var v1;
var sh;
var N;
var s;
var i;
// Retrieve array meta data:
sh = getShape( x );
N = ndims( x );
// Resolve view slice:
s = [];
for ( i = 0; i < N; i++ ) {
s[ i ] = null;
}
dim = normalizeIndex( dim, N -1 );
s[ dim ] = sh[ dim ] - 1;
v1 = sliceFrom( x, s, strict, writable );
v0 = sliceTo( x, s, strict, writable );
return [ v0, v1 ];
}
// EXPORTS //
module.exports = pop;
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