Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 67x 67x 67x 67x 67x 11x 11x 56x 56x 56x 67x 17x 67x 39x 39x 22x 22x 17x 17x 67x 22x 22x 67x 1x 1x 67x 7x 7x 67x 2x 2x 2x 67x 1x 1x 1x 1x 1x | /**
* @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 isCollection = require( '@stdlib/assert/is-collection' );
var returnValues = require( '@stdlib/array/base/bifurcate-values' );
var returnIndices = require( '@stdlib/array/base/bifurcate-indices' );
var returnPairs = require( '@stdlib/array/base/bifurcate-entries' );
var format = require( '@stdlib/string/format' );
var validate = require( './validate.js' );
// MAIN //
/**
* Splits values into two groups.
*
* @param {Collection} collection - input collection
* @param {Options} [options] - function options
* @param {string} [options.returns="values"] - if `values`, values are returned; if `indices`, indices are returned; if `*`, both indices and values are returned
* @param {Collection} filter - collection indicating which group an element in the input collection belongs to
* @throws {TypeError} first argument must be a collection
* @throws {TypeError} options argument must be an object
* @throws {TypeError} must provide valid options
* @throws {TypeError} last argument must be a collection
* @throws {RangeError} first and last arguments must be the same length
* @returns {(Array|ArrayArray)} results
*
* @example
* var arr = [ 'beep', 'boop', 'foo', 'bar' ];
* var filter = [ true, true, false, true ];
*
* var out = bifurcate( arr, filter );
* // returns [ [ 'beep', 'boop', 'bar' ], [ 'foo' ] ]
*
* @example
* var arr = [ 'beep', 'boop', 'foo', 'bar' ];
* var filter = [ true, true, false, true ];
*
* var opts = {
* 'returns': 'indices'
* };
*
* var out = bifurcate( arr, opts, filter );
* // returns [ [ 0, 1, 3 ], [ 2 ] ]
*
* @example
* var arr = [ 'beep', 'boop', 'foo', 'bar' ];
* var filter = [ true, true, false, true ];
*
* var opts = {
* 'returns': '*'
* };
*
* var out = bifurcate( arr, opts, filter );
* // returns [ [ [ 0, 'beep' ], [ 1, 'boop' ], [ 3, 'bar' ] ], [ [ 2, 'foo' ] ] ]
*/
function bifurcate( collection, options, filter ) {
var opts;
var err;
var f;
if ( !isCollection( collection ) ) {
throw new TypeError( format( 'invalid argument. First argument must be a collection. Value: `%s`.', collection ) );
}
opts = {
'returns': 'values'
};
if ( arguments.length === 2 ) {
f = options;
} else {
err = validate( opts, options );
if ( err ) {
throw err;
}
f = filter;
}
if ( !isCollection( f ) ) {
throw new TypeError( format( 'invalid argument. Last argument must be a collection. Value: `%s`.', f ) );
}
if ( collection.length !== f.length ) {
throw new RangeError( 'invalid arguments. First and last arguments must be the same length.' );
}
if ( opts.returns === 'values' ) {
return returnValues( collection, f );
}
if ( opts.returns === 'indices' ) {
return returnIndices( collection, f );
}
return returnPairs( collection, f );
}
// EXPORTS //
module.exports = bifurcate;
|