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* @license Apache-2.0
*
* Copyright (c) 2018 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 format = require( '@stdlib/string/format' );
// MAIN //
/**
* Validates that an instance is in a valid state for rendering.
*
* @private
* @param {Object} state - state
* @throws {Error} must be in a valid state to render
*/
function validate( state ) {
/* eslint-disable no-underscore-dangle */
var x;
var y;
var i;
x = state._xData;
y = state._yData;
if ( x.length !== y.length ) {
throw new Error( format( 'invalid state. x and y are different lengths. x length: `%u`. y length: `%u`.', x.length, y.length ) );
}
// TODO: will need to refactor to some degree to support `ndarray`-like `x` and `y`
for ( i = 0; i < x.length; i++ ) {
if ( x[ i ].length !== y[ i ].length ) {
throw new Error( format( 'invalid state. Each `x[i]:y[i]` pair must be the same length. x[%u].length: `%u`, y[%u].length: `%u`.', i, x[i].length, i, y[i].length ) );
}
}
}
// EXPORTS //
module.exports = validate;
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