From fcaed4305407d20e8d811259135ef593680ad5c6 Mon Sep 17 00:00:00 2001 From: kraftwerk28 Date: Sun, 12 Jan 2020 13:29:28 +0200 Subject: [PATCH 1/2] add: bit-based solution --- Exercises/1-ids.js | 23 +++++++++-------------- 1 file changed, 9 insertions(+), 14 deletions(-) diff --git a/Exercises/1-ids.js b/Exercises/1-ids.js index 29b9450..d4f38b9 100644 --- a/Exercises/1-ids.js +++ b/Exercises/1-ids.js @@ -1,20 +1,15 @@ 'use strict'; -const ids = function* () { - const free = ['0']; - const prepared = { has: false, value: '' }; - - while (true) { - if (prepared.has) { - prepared.has = false; - yield prepared.value; +const ids = function* (i = 1) { + for (;;++i) { + const left = 4 ** i; + for (let j = 0; j < 2 ** i; j++) { + let res = 0; + for (let k = 0; k < i; k++) { + res += (j & (1 << k)) << (k + 1); + } + yield (left + res).toString(2); } - const nextFree = free.shift(); - free.push('01' + nextFree); - free.push('00' + nextFree); - prepared.value = '11' + nextFree; - prepared.has = true; - yield '10' + nextFree; } }; From 71060711afcf921e83b82a756809081e23ebafb5 Mon Sep 17 00:00:00 2001 From: kraftwerk28 Date: Sun, 12 Jan 2020 14:22:05 +0200 Subject: [PATCH 2/2] chore: refactor --- Exercises/1-ids.js | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/Exercises/1-ids.js b/Exercises/1-ids.js index d4f38b9..6e91d57 100644 --- a/Exercises/1-ids.js +++ b/Exercises/1-ids.js @@ -1,11 +1,11 @@ 'use strict'; -const ids = function* (i = 1) { +const ids = function* (i = 0) { for (;;++i) { - const left = 4 ** i; - for (let j = 0; j < 2 ** i; j++) { + const left = 4 << i * 2; + for (let j = 0; j < 2 << i; j++) { let res = 0; - for (let k = 0; k < i; k++) { + for (let k = 0; k < i + 1; k++) { res += (j & (1 << k)) << (k + 1); } yield (left + res).toString(2); pFad - Phonifier reborn

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