# How to use indexInDoubleFromDecomp method in fast-check-monorepo

Best JavaScript code snippet using fast-check-monorepo

math.ts

Source:math.ts

`...261function positiveNumberToInt64(n: number): ArrayInt64['data'] {262 return [~~(n / 0x100000000), n >>> 0]263}264/** @internal */265function indexInDoubleFromDecomp(exponent: number, significand: number): ArrayInt64['data'] {266 // WARNING: significand >= 0267 // By construct of significand in decomposeDouble,268 // significand is always max-ed.269 // The double close to zero are the only one having a significand <1, they also have an exponent of -1022.270 // They are in range: [2**(-1022) * 2**(-52), 2**(-1022) * (2 - 2 ** 52)]271 // In other words there are 2**53 elements in that range if we include zero.272 // All other ranges (other exponents) have a length of 2**52 elements.273 if (exponent === -1022) {274 // We want the significand to be an integer value (like an index)275 const rescaledSignificand = significand * 2 ** 52 // significand * 2**52276 return positiveNumberToInt64(rescaledSignificand)277 }278 // Offset due to exp = -1022 + Offset of previous exp (excl. -1022) + Offset in current exp279 // 2**53 + (exponent - (-1022) -1) * 2**52 + (significand - 1) * 2**52280 // (exponent + 1023) * 2**52 + (significand - 1) * 2**52281 const rescaledSignificand = (significand - 1) * 2 ** 52 // (significand-1) * 2**52282 const exponentOnlyHigh = (exponent + 1023) * 2 ** 20 // (exponent + 1023) * 2**52 => [high: (exponent + 1023) * 2**20, low: 0]283 const index = positiveNumberToInt64(rescaledSignificand)284 index[0] += exponentOnlyHigh285 return index286}287/**288 * Compute the index of d relative to other available 64-bit floating point numbers289 * Rq: Produces negative indexes for negative doubles290 *291 * @param d - 64-bit floating point number, anything except NaN292 *293 * @internal294 */295export function doubleToIndex(d: number): ArrayInt64 {296 if (d === Number.POSITIVE_INFINITY) {297 return clone64(INDEX_POSITIVE_INFINITY)298 }299 if (d === Number.NEGATIVE_INFINITY) {300 return clone64(INDEX_NEGATIVE_INFINITY)301 }302 const decomp = decomposeDouble(d)303 const exponent = decomp.exponent304 const significand = decomp.significand305 if (d > 0 || (d === 0 && 1 / d === Number.POSITIVE_INFINITY)) {306 return { sign: 1, data: indexInDoubleFromDecomp(exponent, significand) }307 } else {308 const indexOpposite = indexInDoubleFromDecomp(exponent, -significand)309 if (indexOpposite[1] === 0xffffffff) {310 indexOpposite[0] += 1311 indexOpposite[1] = 0312 } else {313 indexOpposite[1] += 1314 }315 return { sign: -1, data: indexOpposite } // -indexInDoubleFromDecomp(exponent, -significand) - 1316 }317}318/**319 * Compute the 64-bit floating point number corresponding to the provided indexes320 *321 * @param n - index of the double322 *323 * @internal324 */325export function indexToDouble(index: ArrayInt64): number {326 if (index.sign === -1) {327 const indexOpposite: ArrayInt64 = { sign: 1, data: [index.data[0], index.data[1]] }328 if (indexOpposite.data[1] === 0) {329 indexOpposite.data[0] -= 1...`

DoubleHelpers.ts

Source:DoubleHelpers.ts

`...39function positiveNumberToInt64(n: number): ArrayInt64['data'] {40 return [~~(n / 0x100000000), n >>> 0];41}42/** @internal */43function indexInDoubleFromDecomp(exponent: number, significand: number): ArrayInt64['data'] {44 // WARNING: significand >= 045 // By construct of significand in decomposeDouble,46 // significand is always max-ed.47 // The double close to zero are the only one having a significand <1, they also have an exponent of -1022.48 // They are in range: [2**(-1022) * 2**(-52), 2**(-1022) * (2 - 2 ** 52)]49 // In other words there are 2**53 elements in that range if we include zero.50 // All other ranges (other exponents) have a length of 2**52 elements.51 if (exponent === -1022) {52 // We want the significand to be an integer value (like an index)53 const rescaledSignificand = significand * 2 ** 52; // significand * 2**5254 return positiveNumberToInt64(rescaledSignificand);55 }56 // Offset due to exp = -1022 + Offset of previous exp (excl. -1022) + Offset in current exp57 // 2**53 + (exponent - (-1022) -1) * 2**52 + (significand - 1) * 2**5258 // (exponent + 1023) * 2**52 + (significand - 1) * 2**5259 const rescaledSignificand = (significand - 1) * 2 ** 52; // (significand-1) * 2**5260 const exponentOnlyHigh = (exponent + 1023) * 2 ** 20; // (exponent + 1023) * 2**52 => [high: (exponent + 1023) * 2**20, low: 0]61 const index = positiveNumberToInt64(rescaledSignificand);62 index[0] += exponentOnlyHigh;63 return index;64}65/**66 * Compute the index of d relative to other available 64-bit floating point numbers67 * Rq: Produces negative indexes for negative doubles68 *69 * @param d - 64-bit floating point number, anything except NaN70 *71 * @internal72 */73export function doubleToIndex(d: number): ArrayInt64 {74 if (d === safePositiveInfinity) {75 return clone64(INDEX_POSITIVE_INFINITY);76 }77 if (d === safeNegativeInfinity) {78 return clone64(INDEX_NEGATIVE_INFINITY);79 }80 const decomp = decomposeDouble(d);81 const exponent = decomp.exponent;82 const significand = decomp.significand;83 if (d > 0 || (d === 0 && 1 / d === safePositiveInfinity)) {84 return { sign: 1, data: indexInDoubleFromDecomp(exponent, significand) };85 } else {86 const indexOpposite = indexInDoubleFromDecomp(exponent, -significand);87 if (indexOpposite[1] === 0xffffffff) {88 indexOpposite[0] += 1;89 indexOpposite[1] = 0;90 } else {91 indexOpposite[1] += 1;92 }93 return { sign: -1, data: indexOpposite }; // -indexInDoubleFromDecomp(exponent, -significand) - 194 }95}96/**97 * Compute the 64-bit floating point number corresponding to the provided indexes98 *99 * @param n - index of the double100 *101 * @internal102 */103export function indexToDouble(index: ArrayInt64): number {104 if (index.sign === -1) {105 const indexOpposite: ArrayInt64 = { sign: 1, data: [index.data[0], index.data[1]] };106 if (indexOpposite.data[1] === 0) {107 indexOpposite.data[0] -= 1;...`

Using AI Code Generation

`1const { indexInDoubleFromDecomp } = require('fast-check-monorepo');2const { indexInDoubleFromDecomp } = require('fast-check-monorepo');3const { indexInDoubleFromDecomp } = require('fast-check-monorepo');4const { indexInDoubleFromDecomp } = require('fast-check-monorepo');5const { indexInDoubleFromDecomp } = require('fast-check-monorepo');6const { indexInDoubleFromDecomp } = require('fast-check-monorepo');`

Using AI Code Generation

`1const { indexInDoubleFromDecomp } = require('fast-check-monorepo');2const { indexIn } = require('fast-check');3const { double } = require('fast-check');4const { decomp } = require('fast-check');5const test = () => {6 const d = double();7 const dDecomp = decomp(d);8 const i = indexInDoubleFromDecomp(dDecomp);9 return i === indexIn(d);10}11console.log(test());12const { indexInDoubleFromDecomp } = require('fast-check-monorepo');13const { indexIn } = require('fast-check');14const { double } = require('fast-check');15const { decomp } = require('fast-check');16const test = () => {17 const d = double();18 const dDecomp = decomp(d);19 const i = indexInDoubleFromDecomp(dDecomp);20 return i === indexIn(d);21}22console.log(test());23const { indexInDoubleFromDecomp } = require('fast-check-monorepo');24const { indexIn } = require('fast-check');25const { double } = require('fast-check');26const { decomp } = require('fast-check');27const test = () => {28 const d = double();29 const dDecomp = decomp(d);30 const i = indexInDoubleFromDecomp(dDecomp);31 return i === indexIn(d);32}33console.log(test());34const { indexInDoubleFromDecomp } = require('fast-check-monorepo');35const { indexIn } = require('fast-check');36const { double } = require('fast-check');37const { decomp } = require('fast-check');38const test = () => {39 const d = double();40 const dDecomp = decomp(d);41 const i = indexInDoubleFromDecomp(dDecomp);42 return i === indexIn(d);43}44console.log(test());45const {`

Using AI Code Generation

`1const fc = require("fast-check");2const { indexInDoubleFromDecomp } = require("fast-check-monorepo");3const { double } = fc;4const indexInDouble = indexInDoubleFromDecomp(double);5fc.assert(6 fc.property(double(), (d) => {7 const [n, p] = indexInDouble(d);8 return d === n * Math.pow(2, p);9 })10);`

Using AI Code Generation

`1const { indexInDoubleFromDecomp } = require('fast-check-monorepo');2const { property } = require('fast-check');3property().forall('array number', 'array number', (a, b) => {4 const index = indexInDoubleFromDecomp(a, b);5 return a[index] === b[index];6}).check();7const { indexInDoubleFromDecomp } = require('fast-check-monorepo');8const { property } = require('fast-check');9property().forall('array number', 'array number', (a, b) => {10 const index = indexInDoubleFromDecomp(a, b);11 return a[index] === b[index];12}).check();13const { indexInDoubleFromDecomp } = require('fast-check-monorepo');14const { property } = require('fast-check');15property().forall('array number', 'array number', (a, b) => {16 const index = indexInDoubleFromDecomp(a, b);17 return a[index] === b[index];18}).check();19const { indexInDoubleFromDecomp } = require('fast-check-monorepo');20const { property } = require('fast-check');21property().forall('array number', 'array number', (a, b) => {22 const index = indexInDoubleFromDecomp(a, b);23 return a[index] === b[index];24}).check();25const { indexInDoubleFromDecomp } = require('fast-check-monorepo');26const { property } = require('fast-check');27property().forall('array number', 'array number', (a, b) => {28 const index = indexInDoubleFromDecomp(a, b);29 return a[index] === b[index];30}).check();31const { indexInDoubleFromDecomp } = require('fast`

Using AI Code Generation

`1const {indexInDoubleFromDecomp} = require('fast-check-monorepo');2const [index, result] = indexInDoubleFromDecomp([1, 2, 3, 4, 5, 6], [1, 2, 3, 4, 5, 6]);3console.log(index, result);4const {indexInDoubleFromDecomp} = require('fast-check-monorepo');5const [index, result] = indexInDoubleFromDecomp([1, 2, 3, 4, 5, 6], [6, 5, 4, 3, 2, 1]);6console.log(index, result);7const {indexInDoubleFromDecomp} = require('fast-check-monorepo');8const [index, result] = indexInDoubleFromDecomp([1, 2, 3, 4, 5, 6], [2, 3, 4, 5, 6, 1]);9console.log(index, result);10const {indexInDoubleFromDecomp} = require('fast-check-monorepo');11const [index, result] = indexInDoubleFromDecomp([1, 2, 3, 4, 5, 6], [1, 2, 3, 4, 5]);12console.log(index, result);13const {indexInDoubleFrom`

Using AI Code Generation

`1const { indexInDoubleFromDecomp } = require('fast-check-monorepo');2const { sample } = require('fast-check');3const decomp = (n) => {4 const res = [];5 for (let i = 1; i <= n; i++) {6 res.push(i);7 }8 return res;9};10const test = () => {11 const index = sample(indexInDoubleFromDecomp(decomp));12 console.log(index);13};14test();15const { indexInDoubleFromDecomp } = require('fast-check-monorepo');16const { sample } = require('fast-check');17const decomp = (n) => {18 const res = [];19 for (let i = 1; i <= n; i++) {20 res.push(i);21 }22 return res;23};24const test = () => {25 const index = sample(indexInDoubleFromDecomp(decomp));26 console.log(index);27};28test();29const { indexInDoubleFromDecomp } = require('fast-check-monorepo');30const { sample } = require('fast-check');31const decomp = (n) => {32 const res = [];33 for (let i = 1; i <= n; i++) {34 res.push(i);35 }36 return res;37};38const test = () => {39 const index = sample(indexInDoubleFromDecomp(decomp));40 console.log(index);41};42test();43const { indexInDoubleFromDecomp } = require('fast-check-monorepo');44const { sample } = require('fast-check');45const decomp = (n) => {46 const res = [];47 for (let i = 1; i <= n; i++) {48 res.push(i);49 }50 return res;51};52const test = () => {53 const index = sample(indexInDoubleFromDecomp(decomp));`

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