What is the real world use case, presuming it's not just an academic exercise
On Thu, 7 Mar 2019, 9:08 pm guest271314, <[email protected]> wrote: > Ability to adjust *nth* digit of an integer or decimal by adjusting > decimal or integer at *nth* index of array, to try to solve OEIS A217626 > oeis.org/A217626 directly, for example > ~~(128.625*9*1.074)//1243 > ~~(128.625*9*1.144)//1324 > where the decimal portion can be manipulated by referencing the index of > an array, then converting the array back to a number. > > On Thu, Mar 7, 2019 at 8:55 PM Jeremy Martin <[email protected]> wrote: > >> Can you explain the motivation for this proposal? >> >> At first blush, this seems like an incredibly arbitrary pair of value >> conversion utilities. Are there real world applications for this? >> >> On Thu, Mar 7, 2019 at 3:43 PM guest271314 <[email protected]> wrote: >> >>> >>> >>> ---------- Forwarded message --------- >>> From: guest271314 <[email protected]> >>> Date: Thu, Mar 7, 2019 at 8:35 PM >>> Subject: Proposal: 1) Number (integer or decimal) to Array 2) Array to >>> Number (integer or decimal) >>> To: <[email protected]> >>> >>> >>> Original concept: Integer or decimal to array and array to decimal or >>> integer https://codegolf.meta.stackexchange.com/a/17223 >>> >>> Proof of concept (with bugs) >>> >>> function numberToArray(n) { >>> >>> if (Math.abs(n) == 0 || Math.abs(n) == -0) { >>> return [n] >>> } >>> >>> const r = []; >>> >>> let [ >>> a, int = Number.isInteger(a), d = g = [], e = i = 0 >>> ] = [ n || this.valueOf()]; >>> >>> if (!int) { >>> let e = ~~a; >>> d = a - e; >>> do { >>> if (d < 1) ++i; >>> d *= 10; >>> } while (!Number.isInteger(d)); >>> } >>> >>> for (; ~~a; r.unshift(~~(a % 10)), a /= 10); >>> >>> if (!int) { >>> for (; ~~d; g.unshift(~~(d % 10)), d /= 10); >>> g[0] = g[0] * (1 * (10 ** -i)) >>> r.push(...g); >>> } >>> >>> return r; >>> } >>> function arrayToNumber(a) { >>> if ((Math.abs(a[0]) == 0 || Math.abs(a[0]) == -0) >>> && a.length == 1) >>> >>>
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