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 | 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 27254x 27254x 27254x 27254x 4x 4x 27250x 27254x 9862x 9862x 27254x 256x 256x 17388x 27254x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x | /**
* @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 memoize = require( '@stdlib/utils/memoize' );
// VARIABLES //
var memoized;
// FUNCTIONS //
/**
* Calculates the weight for the `(x,n)` pair and memoizes the result.
*
* @private
* @param {number} x - input value
* @param {NonNegativeInteger} n - number of observations
* @returns {number} weight
*/
function weights( x, n ) {
var mlim;
if ( n === 0 ) {
return ( x === 0 ) ? 1 : 0;
}
mlim = n * ( n + 1 ) / 2;
if ( x < 0 || x > mlim ) {
return 0;
}
if ( x > mlim / 2 ) {
x = mlim - x;
}
return memoized( x - n, n - 1 ) + memoized( x, n - 1 );
}
// MAIN //
memoized = memoize( weights );
// EXPORTS //
module.exports = memoized;
|