/* harmony default export */

/* harmony import */

/*#__PURE__*/

/**
* @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.
*/

/**
* Generate a frequency table.
*
* @module @stdlib/utils/tabulate
*
* @example
* var tabulate = require( '@stdlib/utils/tabulate' );
*
* var arr = [ 'beep', 'boop', 'foo', 'beep' ];
*
* var out = tabulate( arr );
* // returns [ [ 'beep', 2, 0.5 ], [ 'boop', 1, 0.25 ], [ 'foo', 1, 0.25 ] ]
*/

/**
* Generates a frequency table.
*
* ## Notes
*
* -   The output is an array of arrays. Each sub-array corresponds to a unique value in the input collection and is structured as follows:
*
*     -   0: unique value
*     -   1: value count
*     -   2: frequency percentage
*
*
* @param {Collection} collection - input collection
* @throws {TypeError} first argument must be a collection
* @returns {(Array<Array>|Array)} frequency table
*
* @example
* var arr = [ 'beep', 'boop', 'foo', 'beep' ];
*
* var out = tabulate( arr );
* // returns [ [ 'beep', 2, 0.5 ], [ 'boop', 1, 0.25 ], [ 'foo', 1, 0.25 ] ]
*/

/**
* Test if a value is an empty array.
*
* @module @stdlib/assert/is-empty-array
*
* @example
* var isEmptyArray = require( '@stdlib/assert/is-empty-array' );
*
* var bool = isEmptyArray( [] );
* // returns true
*
* bool = isEmptyArray( [ 1, 2, 3 ] );
* // returns false
*
* bool = isEmptyArray( {} );
* // returns false
*/

/**
* Tests if a value is an empty array.
*
* @param {*} value - value to test
* @returns {boolean} boolean indicating whether value is an empty array
*
* @example
* var bool = isEmptyArray( [] );
* // returns true
*
* @example
* var bool = isEmptyArray( [ 1, 2, 3 ] );
* // returns false
*
* @example
* var bool = isEmptyArray( {} );
* // returns false
*/

/***/

// Compute percentages...

// EXPORTS //

// Exports

// For each collection element, determine if we've seen the element before. If not, cache a reference which points to its location in the output array; otherwise, update the running count.

// MAIN //

// MODULES //

// Module

// PROPERTIES //

// TYPES //

// VARIABLES //
