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 | 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 74x 74x 74x 74x 74x 74x 74x 74x 74x 8x 8x 66x 74x 32x 32x 74x 10x 10x 6x 6x 4x 4x 24x 74x 38x 38x 20x 20x 18x 18x 74x 4x 4x 20x 20x 20x 74x 51x 51x 51x 6x 6x 51x 16x 51x 21x 21x 51x 20x 74x 3x 3x 3x 3x 3x | /**
* @license Apache-2.0
*
* Copyright (c) 2025 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 isPositiveZero = require( '@stdlib/math/base/assert/is-positive-zero' );
var isNegativeZero = require( '@stdlib/math/base/assert/is-negative-zero' );
var isnan = require( '@stdlib/math/base/assert/is-nan' );
var arraylike2object = require( '@stdlib/array/base/arraylike2object' );
var accessors = require( './accessors.js' );
// MAIN //
/**
* Computes the mid-range of a strided array via a callback function, ignoring `NaN` values.
*
* @param {PositiveInteger} N - number of indexed elements
* @param {Collection} x - input array
* @param {integer} strideX - stride length
* @param {NonNegativeInteger} offsetX - starting index
* @param {Callback} clbk - callback
* @param {*} [thisArg] - execution context
* @returns {number} mid-range
*
* @example
* var x = [ -2.0, 1.0, 3.0, -5.0, 4.0, 0.0, -1.0, -3.0, NaN ];
*
* function accessor( v ) {
* return v * 2.0;
* }
*
* var v = nanmidrangeBy( x.length, x, 1, 0, accessor );
* // returns -1.0
*/
function nanmidrangeBy( N, x, strideX, offsetX, clbk, thisArg ) {
var max;
var min;
var ix;
var v;
var i;
var o;
if ( N <= 0 ) {
return NaN;
}
o = arraylike2object( x );
if ( o.accessorProtocol ) {
return accessors( N, o, strideX, offsetX, clbk, thisArg );
}
if ( N === 1 || strideX === 0 ) {
v = clbk.call( thisArg, x[ offsetX ], 0, offsetX, x );
if ( v === void 0 || isnan( v ) ) {
return NaN;
}
return v;
}
ix = offsetX;
for ( i = 0; i < N; i++ ) {
v = clbk.call( thisArg, x[ ix ], i, ix, x );
if ( v !== void 0 && v === v ) {
break;
}
ix += strideX;
}
if ( i === N ) {
return NaN;
}
min = v;
max = min;
i += 1;
for ( i; i < N; i++ ) {
ix += strideX;
v = clbk.call( thisArg, x[ ix ], i, ix, x );
if ( v === void 0 || isnan( v ) ) {
continue;
}
if ( v < min || ( v === min && isNegativeZero( v ) ) ) {
min = v;
} else if ( v > max || ( v === max && isPositiveZero( v ) ) ) {
max = v;
}
}
return ( max + min ) / 2.0;
}
// EXPORTS //
module.exports = nanmidrangeBy;
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