<!-- @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. --> # isBetweenArray > Test if a value is an array-like object where every element is between two values. <section class="usage"> ## Usage ```javascript var isBetweenArray = require( '@stdlib/assert/is-between-array' ); ``` #### isBetweenArray( value, a, b\[, left, right] ) Tests if a `value` is an array-like `object` where every element is between two values `a` (left comparison value) and `b` (right comparison value). ```javascript var arr = [ 3, 4, 5 ]; var bool = isBetweenArray( arr, 3, 5 ); // returns true bool = isBetweenArray( arr, 4, 5 ); // returns false bool = isBetweenArray( arr, 3, 4 ); // returns false ``` By default, the function assumes that `a` and `b` are inclusive. ```javascript var arr = [ 3, 4, 5 ]; var bool = isBetweenArray( arr, 3, 5 ); // returns true bool = isBetweenArray( arr, 3, 5, 'closed', 'closed' ); // returns true ``` To make `a` and/or `b` exclusive, set the respective arguments to `'open'`. ```javascript var arr = [ 3, 4, 5 ]; var bool = isBetweenArray( arr, 3, 5, 'open', 'closed' ); // returns false bool = isBetweenArray( arr, 3, 5, 'closed', 'open' ); // returns false ``` </section> <!-- /.usage --> <section class="notes"> ## Notes - If `a` and `b` are inclusive, the element-wise comparison is equivalent to ```text a <= v_i <= b ``` - If `a` is exclusive and `b` is inclusive, the element-wise comparison is equivalent to ```text a < v_i <= b ``` - If `a` is inclusive and `b` is exclusive, the element-wise comparison is equivalent to ```text a <= v_i < b ``` - If `a` and `b` are exclusive, the element-wise comparison is equivalent to ```text a < v_i < b ``` - If provided an empty array-like `object`, the function returns `false`. ```javascript var bool = isBetweenArray( [], 0.0, 1.0 ); // returns false ``` - If provided non-numeric values, element-wise comparisons are performed according to lexicographic order. </section> <!-- /.notes --> <section class="examples"> ## Examples <!-- eslint no-undef: "error" --> ```javascript var randu = require( '@stdlib/random/base/randu' ); var Float64Array = require( '@stdlib/array/float64' ); var isBetweenArray = require( '@stdlib/assert/is-between-array' ); var x; var i; x = new Float64Array( 100 ); for ( i = 0; i < x.length; i++ ) { x[ i ] = randu(); } console.log( isBetweenArray( x, 0.01, 0.99 ) ); ``` </section> <!-- /.examples --> <section class="links"> </section> <!-- /.links -->