125 lines
4.3 KiB
JavaScript
125 lines
4.3 KiB
JavaScript
import Decimal from 'decimal.js';
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import { factory } from '../../utils/factory.js';
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import { deepMap } from '../../utils/collection.js';
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import { nearlyEqual } from '../../utils/number.js';
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import { nearlyEqual as bigNearlyEqual } from '../../utils/bignumber/nearlyEqual.js';
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import { createAlgorithm11 } from '../../type/matrix/utils/algorithm11.js';
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import { createAlgorithm14 } from '../../type/matrix/utils/algorithm14.js';
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var name = 'floor';
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var dependencies = ['typed', 'config', 'round', 'matrix', 'equalScalar'];
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export var createFloor = /* #__PURE__ */factory(name, dependencies, _ref => {
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var {
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typed,
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config,
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round,
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matrix,
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equalScalar
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} = _ref;
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var algorithm11 = createAlgorithm11({
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typed,
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equalScalar
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});
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var algorithm14 = createAlgorithm14({
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typed
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});
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/**
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* Round a value towards minus infinity.
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* For matrices, the function is evaluated element wise.
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*
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* Syntax:
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*
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* math.floor(x)
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* math.floor(x, n)
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*
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* Examples:
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*
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* math.floor(3.2) // returns number 3
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* math.floor(3.8) // returns number 3
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* math.floor(-4.2) // returns number -5
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* math.floor(-4.7) // returns number -5
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*
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* math.floor(3.212, 2) // returns number 3.21
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* math.floor(3.288, 2) // returns number 3.28
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* math.floor(-4.212, 2) // returns number -4.22
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* math.floor(-4.782, 2) // returns number -4.79
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*
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* const c = math.complex(3.24, -2.71)
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* math.floor(c) // returns Complex 3 - 3i
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* math.floor(c, 1) // returns Complex 3.2 - 2.8i
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*
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* math.floor([3.2, 3.8, -4.7]) // returns Array [3, 3, -5]
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* math.floor([3.21, 3.82, -4.71], 1) // returns Array [3.2, 3.8, -4.8]
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*
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* See also:
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*
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* ceil, fix, round
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*
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* @param {number | BigNumber | Fraction | Complex | Array | Matrix} x Number to be rounded
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* @param {number | BigNumber | Array} [n=0] Number of decimals
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* @return {number | BigNumber | Fraction | Complex | Array | Matrix} Rounded value
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*/
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return typed('floor', {
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number: function number(x) {
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if (nearlyEqual(x, round(x), config.epsilon)) {
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return round(x);
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} else {
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return Math.floor(x);
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}
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},
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'number, number': function numberNumber(x, n) {
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if (nearlyEqual(x, round(x, n), config.epsilon)) {
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return round(x, n);
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} else {
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var [number, exponent] = "".concat(x, "e").split('e');
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var result = Math.floor(Number("".concat(number, "e").concat(Number(exponent) + n)));
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[number, exponent] = "".concat(result, "e").split('e');
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return Number("".concat(number, "e").concat(Number(exponent) - n));
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}
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},
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Complex: function Complex(x) {
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return x.floor();
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},
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'Complex, number': function ComplexNumber(x, n) {
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return x.floor(n);
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},
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BigNumber: function BigNumber(x) {
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if (bigNearlyEqual(x, round(x), config.epsilon)) {
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return round(x);
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} else {
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return x.floor();
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}
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},
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'BigNumber, BigNumber': function BigNumberBigNumber(x, n) {
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if (bigNearlyEqual(x, round(x, n), config.epsilon)) {
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return round(x, n);
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} else {
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return x.toDecimalPlaces(n.toNumber(), Decimal.ROUND_FLOOR);
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}
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},
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Fraction: function Fraction(x) {
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return x.floor();
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},
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'Fraction, number': function FractionNumber(x, n) {
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return x.floor(n);
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},
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'Array | Matrix': function ArrayMatrix(x) {
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// deep map collection, skip zeros since floor(0) = 0
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return deepMap(x, this, true);
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},
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'Array | Matrix, number': function ArrayMatrixNumber(x, n) {
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// deep map collection, skip zeros since ceil(0) = 0
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return deepMap(x, i => this(i, n), true);
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},
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'SparseMatrix, number | BigNumber': function SparseMatrixNumberBigNumber(x, y) {
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return algorithm11(x, y, this, false);
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},
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'DenseMatrix, number | BigNumber': function DenseMatrixNumberBigNumber(x, y) {
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return algorithm14(x, y, this, false);
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},
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'number | Complex | BigNumber, Array': function numberComplexBigNumberArray(x, y) {
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// use matrix implementation
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return algorithm14(matrix(y), x, this, true).valueOf();
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}
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});
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}); |