# How to use logLike64 method in fast-check-monorepo

Best JavaScript code snippet using fast-check-monorepo

math.ts

Source:math.ts

`...217/**218 * Apply log2 to an ArrayInt64 (preserve sign)219 * @internal220 */221export function logLike64(a: ArrayInt64): ArrayInt64 {222 // Math.floor(Math.log(hi * 2**32 + low) / Math.log(2)) <= Math.floor(Math.log(2**64) / Math.log(2)) = 64223 return {224 sign: a.sign,225 data: [0, Math.floor(Math.log(a.data[0] * 0x100000000 + a.data[1]) / Math.log(2))]226 }227}228/** @internal */229const INDEX_POSITIVE_INFINITY: ArrayInt64 = { sign: 1, data: [2146435072, 0] } // doubleToIndex(Number.MAX_VALUE) + 1;230/** @internal */231const INDEX_NEGATIVE_INFINITY: ArrayInt64 = { sign: -1, data: [2146435072, 1] } // doubleToIndex(-Number.MAX_VALUE) - 1232/**233 * Decompose a 64-bit floating point number into a significand and exponent234 * such that:235 * - significand over 53 bits including sign (also referred as fraction)236 * - exponent over 11 bits including sign237 * - whenever there are multiple possibilities we take the one having the highest significand (in abs)238 * - Number.MAX_VALUE = 2**1023 * (1 + (2**52-1)/2**52)239 * = 2**1023 * (2 - Number.EPSILON)240 * - Number.MIN_VALUE = 2**(-1022) * 2**(-52)241 * - Number.EPSILON = 2**(-52)242 *243 * @param d - 64-bit floating point number to be decomposed into (significand, exponent)244 *245 * @internal246 */247export function decomposeDouble(d: number): { exponent: number, significand: number } {248 // 1 => significand 0b1 - exponent 1 (will be preferred)249 // => significand 0b0.1 - exponent 2250 const maxSignificand = 2 - Number.EPSILON251 for (let exponent = -1022; exponent !== 1024; ++exponent) {252 const powExponent = 2 ** exponent253 const maxForExponent = maxSignificand * powExponent254 if (Math.abs(d) <= maxForExponent) {255 return { exponent, significand: d / powExponent }256 }257 }258 return { exponent: Number.NaN, significand: Number.NaN }259}260/** @internal */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] -= 1330 indexOpposite.data[1] = 0xffffffff331 } else {332 indexOpposite.data[1] -= 1333 }334 return -indexToDouble(indexOpposite) // -indexToDouble(-index - 1);335 }336 if (isEqual64(index, INDEX_POSITIVE_INFINITY)) {337 return Number.POSITIVE_INFINITY338 }339 if (index.data[0] < 0x200000) {340 // if: index < 2 ** 53 <--> index[0] < 2 ** (53-32) = 0x20_0000341 // The first 2**53 elements correspond to values having342 // exponent = -1022 and significand = index * Number.EPSILON343 // double value = index * 2 ** -1022 * Number.EPSILON344 // = index * 2 ** -1022 * 2 ** -52345 // = index * 2 ** -1074346 return (index.data[0] * 0x100000000 + index.data[1]) * 2 ** -1074347 }348 const postIndexHigh = index.data[0] - 0x200000 // postIndex = index - 2 ** 53349 // exponent = -1021 + Math.floor(postIndex / 2**52)350 // = -1021 + Math.floor(postIndexHigh / 2**(52-32))351 // = -1021 + Math.floor(postIndexHigh / 2**20)352 // = -1021 + (postIndexHigh >> 20)353 const exponent = -1021 + (postIndexHigh >> 20)354 // significand = 1 + (postIndex % 2**52) / 2**52355 // = 1 + ((postIndexHigh * 2**32 + postIndexLow) % 2**52) / 2**52356 // = 1 + ((postIndexHigh % 2**20) * 2**32 + postIndexLow) / 2**52357 // = 1 + ((postIndexHigh & 0xfffff) * 2**32 + postIndexLow) / 2**52358 // = 1 + ((postIndexHigh & 0xfffff) * 2**32 + postIndexLow) * Number.EPSILON359 const significand = 1 + ((postIndexHigh & 0xfffff) * 2 ** 32 + index.data[1]) * Number.EPSILON360 return significand * 2 ** exponent361}362/**363 * Same as {@link doubleToIndex} except it throws in case of invalid double364 *365 * @internal366 */367export function safeDoubleToIndex(d: number, label: string): I.IO<unknown, never, ArrayInt64> {368 if (Number.isNaN(d)) {369 // Number.NaN does not have any associated index in the current implementation370 return I.die(new Error('fc.doubleNext constraints.' + label + ' must be a 32-bit float'))371 }372 return I.succeed(doubleToIndex(d))373}374let EPSILON = Math.pow(2, -52)375let MAX_VALUE = (2 - EPSILON) * Math.pow(2, 1023)376let MIN_VALUE = Math.pow(2, -1022)377export function nextUp(x: number) {378 if (x !== x) {379 return x380 }381 if (x === -1 / 0) {382 return -MAX_VALUE383 }384 if (x === +1 / 0) {385 return +1 / 0386 }387 if (x === +MAX_VALUE) {388 return +1 / 0389 }390 let y = x * (x < 0 ? 1 - EPSILON / 2 : 1 + EPSILON)391 if (y === x) {392 y = MIN_VALUE * EPSILON > 0 ? x + MIN_VALUE * EPSILON : x + MIN_VALUE393 }394 if (y === +1 / 0) {395 y = +MAX_VALUE396 }397 let b = x + (y - x) / 2398 if (x < b && b < y) {399 y = b400 }401 let c = (y + x) / 2402 if (x < c && c < y) {403 y = c404 }405 return y === 0 ? -0 : y406}407export function nextAfter(x: number, y: number) {408 return y < x ? -nextUp(-x) : y > x ? nextUp(x) : x !== x ? x : y409}410export function computeBiasedRanges(411 min: ArrayInt64,412 max: ArrayInt64,413 biasedRanges?: { min: ArrayInt64, max: ArrayInt64 }[]414): { min: ArrayInt64, max: ArrayInt64 }[] {415 if (biasedRanges != null) {416 return biasedRanges417 }418 if (isEqual64(min, max)) {419 return [{ min, max }]420 }421 const minStrictlySmallerThanZero = isStrictlyNegative64(min)422 const maxStrictlyGreaterThanZero = isStrictlyPositive64(max)423 if (minStrictlySmallerThanZero && maxStrictlyGreaterThanZero) {424 const logMin = logLike64(min)425 const logMax = logLike64(max)426 return [427 { min: logMin, max: logMax },428 { min: substract64(max, logMax), max },429 { min, max: substract64(min, logMin) }430 ]431 } else {432 const logGap = logLike64(substract64(max, min))433 const closeToMin = { min, max: add64(min, logGap) }434 const closeToMax = { min: substract64(max, logGap), max }435 return minStrictlySmallerThanZero ? [closeToMax, closeToMin] : [closeToMin, closeToMax]436 }437}438export function computeArrayInt64GenerateRange(439 min: ArrayInt64,440 max: ArrayInt64,441 biasFactor: number | undefined,442 biasedRanges: { min: ArrayInt64, max: ArrayInt64 }[] | undefined443): I.URIO<Has<Random>, { min: ArrayInt64, max: ArrayInt64 }> {444 return I.gen(function* (_) {445 if (biasFactor === undefined || (yield* _(Random.nextIntBetween(1, biasFactor))) !== 1) {446 return { min, max }...`

ArrayInt64Arbitrary.ts

Source:ArrayInt64Arbitrary.ts

`...129 const minStrictlySmallerZero = isStrictlyNegative64(this.min);130 const maxStrictlyGreaterZero = isStrictlyPositive64(this.max);131 if (minStrictlySmallerZero && maxStrictlyGreaterZero) {132 // min < 0 && max > 0133 const logMin = logLike64(this.min); // min !== 0 -> <=0134 const logMax = logLike64(this.max); // max !== 0 -> >=0135 this.biasedRanges = [136 { min: logMin, max: logMax }, // close to zero,137 { min: substract64(this.max, logMax), max: this.max }, // close to max138 { min: this.min, max: substract64(this.min, logMin) }, // close to min139 ];140 } else {141 // Either min < 0 && max <= 0142 // Or min >= 0, so max >= 0143 const logGap = logLike64(substract64(this.max, this.min)); // max-min !== 0 -> >=0144 const arbCloseToMin = { min: this.min, max: add64(this.min, logGap) }; // close to min145 const arbCloseToMax = { min: substract64(this.max, logGap), max: this.max }; // close to max146 this.biasedRanges = minStrictlySmallerZero147 ? [arbCloseToMax, arbCloseToMin] // max is closer to zero148 : [arbCloseToMin, arbCloseToMax]; // min is closer to zero149 }150 return this.biasedRanges;151 }152}153/** @internal */154export function arrayInt64(min: ArrayInt64, max: ArrayInt64): Arbitrary<ArrayInt64> {155 const arb = new ArrayInt64Arbitrary(min, max);156 return arb;157}`

Using AI Code Generation

`1const fc = require('fast-check');2const {logLike64} = require('fast-check/lib/check/arbitrary/LogLikeArbitrary.js');3fc.assert(fc.property(logLike64(), (logLike) => {4 console.log(logLike);5 return true;6}));7const fc = require('fast-check');8const {logLike64} = require('fast-check/lib/check/arbitrary/LogLikeArbitrary.js');9fc.assert(fc.property(logLike64(), (logLike) => {10 console.log(logLike);11 return true;12}));13const fc = require('fast-check');14const {logLike64} = require('fast-check/lib/check/arbitrary/LogLikeArbitrary.js');15fc.assert(fc.property(logLike64(), (logLike) => {16 console.log(logLike);17 return true;18}));19const fc = require('fast-check');20const {logLike64} = require('fast-check/lib/check/arbitrary/LogLikeArbitrary.js');21fc.assert(fc.property(logLike64(), (logLike) => {22 console.log(logLike);23 return true;24}));25const fc = require('fast-check');26const {logLike64} = require('fast-check/lib/check/arbitrary/LogLikeArbitrary.js');27fc.assert(fc.property(logLike64(), (logLike) => {28 console.log(logLike);29 return true;30}));31const fc = require('fast-check');32const {logLike64} = require('fast-check/lib/check/arbitrary/LogLikeArbitrary.js');33fc.assert(fc.property(logLike64(), (logLike`

Using AI Code Generation

`1const fc = require('fast-check');2const { logLike64 } = require('fast-check-monorepo');3fc.configureGlobal({ logger: logLike64() });4fc.assert(5 fc.property(fc.integer(), fc.integer(), (a, b) => a + b === b + a)6);7const fc = require('fast-check');8const { logLike64 } = require('fast-check-monorepo');9fc.configureGlobal({ logger: logLike64() });10fc.assert(11 fc.property(fc.integer(), fc.integer(), (a, b) => a + b === b + a)12);13const fc = require('fast-check');14const { logLike64 } = require('fast-check-monorepo');15fc.configureGlobal({ logger: logLike64() });16fc.assert(17 fc.property(fc.integer(), fc.integer(), (a, b) => a + b === b + a)18);19const fc = require('fast-check');20const { logLike64 } = require('fast-check-monorepo');21fc.configureGlobal({ logger: logLike64() });22fc.assert(23 fc.property(fc.integer(), fc.integer(), (a, b) => a + b === b + a)24);25const fc = require('fast-check');26const { logLike64 } = require('fast-check-monorepo');27fc.configureGlobal({ logger: logLike64() });28fc.assert(29 fc.property(fc.integer(), fc.integer(), (a, b) => a + b === b + a)30);31const fc = require('fast-check');32const { logLike64 } = require('fast-check-monorepo');33fc.configureGlobal({ logger: logLike64() });34fc.assert(35 fc.property(fc.integer(), fc.integer(), (a, b) => a + b === b + a)36);`

Using AI Code Generation

`1const fc = require('fast-check');2const { logLike64 } = require('fast-check/lib/check/arbitrary/LogLikeArbitrary');3fc.assert(4 fc.property(fc.integer(), fc.integer(), (a, b) => {5 return logLike64(a, b) !== logLike64(b, a);6 })7);8const fc = require('fast-check');9const { logLike64 } = require('fast-check/lib/check/arbitrary/LogLikeArbitrary');10fc.assert(11 fc.property(fc.integer(), fc.integer(), (a, b) => {12 return logLike64(a, b) !== logLike64(b, a);13 })14);15const fc = require('fast-check');16const { logLike64 } = require('fast-check/lib/check/arbitrary/LogLikeArbitrary');17fc.assert(18 fc.property(fc.integer(), fc.integer(), (a, b) => {19 return logLike64(a, b) !== logLike64(b, a);20 })21);22const fc = require('fast-check');23const { logLike64 } = require('fast-check/lib/check/arbitrary/LogLikeArbitrary');24fc.assert(25 fc.property(fc.integer(), fc.integer(), (a, b) => {26 return logLike64(a, b) !== logLike64(b, a);27 })28);29const fc = require('fast-check');30const { logLike64 } = require('fast-check/lib/check/arbitrary/LogLikeArbitrary');31fc.assert(32 fc.property(fc.integer(), fc.integer(), (a, b) => {33 return logLike64(a, b) !== logLike64(b, a);34 })35);36const fc = require('fast-check');37const { logLike64 } = require('fast-check/lib/check/arbitrary/LogLikeArbitrary');38fc.assert(39 fc.property(fc.integer(), fc.integer(), (a, b) => {`

Using AI Code Generation

`1const fc = require('fast-check');2const logLike = require('fast-check/lib/check/arbitrary/LogLikeArbitrary').logLike64;3const { logLike64 } = require('fast-check/lib/check/arbitrary/LogLikeArbitrary');4const { logLike64: logLike64_ } = require('fast-check/lib/check/arbitrary/LogLikeArbitrary');5const fc = require('fast-check');6const { logLike64 } = require('fast-check/lib/check/arbitrary/LogLikeArbitrary');7const fc = require('fast-check');8const { logLike64 } = require('fast-check/lib/check/arbitrary/LogLikeArbitrary');`

Using AI Code Generation

`1const fc = require('fast-check');2const { logLike64 } = require('fast-check/lib/check/arbitrary/LogLikeArbitrary');3const { array, integer } = require('fast-check/lib/check/arbitrary/definition/ArbitraryBuilder');4const logLike = logLike64();5const arb = array(integer(0, 100), 1, 100).map(logLike);6fc.assert(fc.property(arb, (v) => {7 console.log(v);8 return true;9}));`

Using AI Code Generation

`1const fastcheck = require('fast-check');2const logLike64 = fastcheck.logLike64;3const fc = require('fast-check');4const assert = require('assert');5const { toHexString } = require('hex2ascii');6const { isHex } = require('is-hex');7const logLike64Arb = fc.tuple(fc.nat(), fc.string()).map(([seed, str]) => {8 return logLike64(seed, str);9});10fc.assert(11 fc.property(logLike64Arb, (logLike) => {12 const hex = toHexString(logLike);13 assert(isHex(hex));14 }),15);16const fastcheck = require('fast-check');17const logLike64 = fastcheck.logLike64;18const fc = require('fast-check');19const assert = require('assert');20const { toHexString } = require('hex2ascii');21const { isHex } = require('is-hex');22const logLike64Arb = fc.tuple(fc.nat(), fc.string()).map(([seed, str]) => {23 return logLike64(seed, str);24});25fc.assert(26 fc.property(logLike64Arb, (logLike) => {27 const hex = toHexString(logLike);28 assert(isHex(hex));29 }),30);31const fastcheck = require('fast-check');32const logLike64 = fastcheck.logLike64;33const fc = require('fast-check');34const assert = require('assert');35const { toHexString } = require('hex2ascii');36const { isHex } = require('is-hex');37const logLike64Arb = fc.tuple(fc.nat(), fc.string()).map(([seed, str]) => {38 return logLike64(seed, str);39});40fc.assert(41 fc.property(logLike64Arb, (logLike) => {42 const hex = toHexString(logLike);43 assert(isHex(hex));44 }),45);46const fastcheck = require('fast-check');47const logLike64 = fastcheck.logLike64;48const fc = require('fast-check');49const assert = require('assert');50const { toHexString } = require`

Using AI Code Generation

`1const fc = require('fast-check')2const { logLike64 } = require('fast-check/lib/check/arbitrary/LogLikeArbitrary.js')3logLike64(10)4console.log('test3.js: logLike64(10)')5const fc = require('fast-check')6const { logLike64 } = require('fast-check/lib/check/arbitrary/LogLikeArbitrary.js')7logLike64(20)8console.log('test4.js: logLike64(20)')9const fc = require('fast-check')10const { logLike64 } = require('fast-check/lib/check/arbitrary/LogLikeArbitrary.js')11logLike64(30)12console.log('test5.js: logLike64(30)')13const fc = require('fast-check')14const { logLike64 } = require('fast-check/lib/check/arbitrary/LogLikeArbitrary.js')15logLike64(40)16console.log('test6.js: logLike64(40)')`

Using AI Code Generation

`1import { logLike64 } from 'fast-check';2logLike64().subscribe((v) => console.log(v));3import { logLike64 } from 'fast-check-monorepo';4logLike64().subscribe((v) => console.log(v));5import { logLike64 } from 'fast-check-monorepo';6logLike64().subscribe((v) => console.log(v));7import { logLike64 } from 'fast-check-monorepo';8logLike64().subscribe((v) => console.log(v));9import { logLike64 } from 'fast-check-monorepo';10logLike64().subscribe((v) => console.log(v));11import { logLike64 } from 'fast-check-monorepo';12logLike64().subscribe((v) => console.log(v));13import { logLike64 } from 'fast-check-monorepo';14logLike64().subscribe((v) => console.log(v));`

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