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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 isObject = require( '@stdlib/assert/is-plain-object' );
var assign = require( '@stdlib/object/assign' );
var format = require( '@stdlib/string/format' );
var RandomStream = require( './main.js' );
// MAIN //
/**
* Returns an "objectMode" readable stream for generating pseudorandom numbers drawn from a triangular distribution.
*
* @param {number} a - minimum support
* @param {number} b - maximum support
* @param {number} c - mode
* @param {Options} [options] - stream options
* @param {(string|null)} [options.encoding=null] - specifies how `Buffer` objects should be decoded to `strings`
* @param {NonNegativeNumber} [options.highWaterMark] - specifies the maximum number of objects to store in an internal buffer before ceasing to generate additional pseudorandom numbers
* @param {NonNegativeInteger} [options.iter] - number of iterations
* @param {PRNG} [options.prng] - pseudorandom number generator which generates uniformly distributed pseudorandom numbers
* @param {PRNGSeedMT19937} [options.seed] - pseudorandom number generator seed
* @param {PRNGStateMT19937} [options.state] - pseudorandom number generator state
* @param {boolean} [options.copy=true] - boolean indicating whether to copy a provided pseudorandom number generator state
* @param {PositiveInteger} [options.siter] - number of iterations after which to emit the PRNG state
* @throws {TypeError} `a` must be a number
* @throws {TypeError} `b` must be a number
* @throws {TypeError} `c` must be a number
* @throws {RangeError} arguments must satisfy `a <= c <= b`
* @throws {TypeError} options argument must be an object
* @throws {TypeError} must provide valid options
* @throws {Error} must provide a valid state
* @returns {RandomStream} Stream instance
*
* @example
* var inspectStream = require( '@stdlib/streams/node/inspect-sink' );
*
* function log( v ) {
* console.log( v );
* }
*
* var opts = {
* 'iter': 10
* };
*
* var stream = objectMode( 2.0, 5.0, 4.0, opts );
*
* stream.pipe( inspectStream.objectMode( log ) );
*/
function objectMode( a, b, c, options ) {
var opts;
if ( arguments.length > 3 ) {
opts = options;
if ( !isObject( opts ) ) {
throw new TypeError( format( 'invalid argument. Options argument must be an object. Value: `%s`.', opts ) );
}
opts = assign( {}, options );
} else {
opts = {};
}
opts.objectMode = true;
return new RandomStream( a, b, c, opts );
}
// EXPORTS //
module.exports = objectMode;
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