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* @license Apache-2.0
*
* Copyright (c) 2024 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 isScalarMostlySafeCompatible = require( '@stdlib/ndarray/base/assert/is-scalar-mostly-safe-compatible' ); // eslint-disable-line id-length
var scalar2ndarray = require( '@stdlib/ndarray/base/from-scalar' );
var getDType = require( '@stdlib/ndarray/base/dtype' );
var getOrder = require( '@stdlib/ndarray/base/order' );
var assign = require( '@stdlib/ndarray/base/assign-scalar' );
var format = require( '@stdlib/string/format' );
// MAIN //
/**
* Fills an input ndarray with a specified value.
*
* @param {ndarrayLike} x - input ndarray
* @param {*} value - scalar value
* @throws {TypeError} second argument cannot be safely cast to the input array data type
* @returns {ndarrayLike} input ndarray
*
* @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 out = fill( x, 10.0 );
* // returns <ndarray>[ [ [ 10.0, 10.0 ] ], [ [ 10.0, 10.0 ] ], [ [ 10.0, 10.0 ] ] ]
*
* var bool = ( out === x );
* // returns true
*/
function fill( x, value ) {
var dt;
var v;
dt = getDType( x );
// Safe casts are always allowed and allow same kind casts (i.e., downcasts) only when the output data type is floating-point...
if ( !isScalarMostlySafeCompatible( value, dt ) ) {
throw new TypeError( format( 'invalid argument. The second argument cannot be safely cast to the input array data type. Data type: %s. Value: `%s`.', dt, value ) );
}
// Convert the fill value to an ndarray having the same data type as the input ndarray:
v = scalar2ndarray( value, dt, getOrder( x ) );
// Assign the fill value to each element of the input ndarray:
assign( [ v, x ] );
return x;
}
// EXPORTS //
module.exports = fill;
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