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* @license Apache-2.0
*
* Copyright (c) 2020 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 iterMap = require( '@stdlib/math/iter/tools/map' );
var acoth = require( '@stdlib/math/base/special/acoth' );
// MAIN //
/**
* Returns an iterator which iteratively computes the inverse hyperbolic cotangent.
*
* ## Notes
*
* - The domain of inverse hyperbolic cotangent is restricted to `(-inf,-1]` and `[1,inf)`. If an iterated value is outside of the domain, the returned iterator returns `NaN`.
* - If an environment supports `Symbol.iterator` **and** a provided iterator is iterable, the returned iterator is iterable.
*
* @param {Iterator} iterator - input iterator
* @throws {TypeError} must provide an iterator protocol-compliant object
* @returns {Iterator} iterator
*
* @example
* var uniform = require( '@stdlib/random/iter/uniform' );
*
* var iter = iterAcoth( uniform( 1.0, 10.0 ) );
*
* var r = iter.next().value;
* // returns <number>
*
* r = iter.next().value;
* // returns <number>
*
* r = iter.next().value;
* // returns <number>
*
* // ...
*/
function iterAcoth( iterator ) {
return iterMap( iterator, acoth );
}
// EXPORTS //
module.exports = iterAcoth;
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