All files / lib/accessors is_defined.js

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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 logger = require( 'debug' );
var isnan = require( '@stdlib/assert/is-nan' ).isPrimitive;
 
 
// VARIABLES //
 
var debug = logger( 'plot:accessor:is-defined' );
 
 
// MAIN //
 
/**
* Accessor function which determines whether a datum is defined.
*
* @private
* @param {number} d - datum
* @param {integer} i - index
* @returns {boolean} boolean indicating whether a datum is defined
*/
function isDefined( d ) {
	var bool = !isnan( d );
	debug( 'Datum: %s. Defined: %s.', JSON.stringify( d ), bool );
	return bool;
}
 
 
// EXPORTS //
 
module.exports = isDefined;