how to convert a number to a number array in javascript without convert number to a string

how to convert a number to a number array in javascript without convert number to a string

如何在不将数字转换为一个字符串的情况下将一数字转换为javascript中的一个数字数组

Number To Array

Math.round 四舍五入 bug

"use strict";

/**
 *
 * @author xgqfrms
 * @license MIT
 * @copyright xgqfrms
 * @created 2020-07-23
 * @modified
 *
 * @description 9. Palindrome Number
 * @difficulty Easy
 * @complexity O(n)
 * @augments
 * @example
 * @link https://leetcode.com/problems/palindrome-number/
 * @link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/log10
 * @solutions
 *
 */

const log = console.log;

function NumberToArray(num = 1) {
  const result = [];
  const len = Math.ceil(Math.log10(num + 1));
  let temp = num;
  for (let i = len; i > 0; i--) {
    log(`\ntemp 1`, temp, len)
    // Math.round 四舍五入 bug
    log(`value =`, parseInt(temp / Math.pow(10, i - 1)), Math.pow(10, i - 1))
    result.push(parseInt(temp / Math.pow(10, i - 1)));
    log(`result[len - i]`, result[len - i], len - i, len, i)
    log(`result[len - i] * Math.pow(10, i - 1)`, result[len - i] * Math.pow(10, i - 1))
    temp -= result[len - i] * Math.pow(10, i - 1);
    log(`temp`, temp)
  }
  // for (let i = len; i > 0; i--) {
  //   log(`\ntemp 1`, temp, len)
  //   // Math.round 四舍五入 bug
  //   log(`value =`, Math.round(temp / Math.pow(10, i - 1)), Math.pow(10, i - 1))
  //   result.push(Math.round(temp / Math.pow(10, i - 1)));
  //   log(`result[len - i]`, result[len - i], len - i, len, i)
  //   log(`result[len - i] * Math.pow(10, i - 1)`, result[len - i] * Math.pow(10, i - 1))
  //   temp -= result[len - i] * Math.pow(10, i - 1);
  //   log(`temp`, temp)
  // }
  // for (let i = len; i > 0; i--) {
  //   log(`num % (i * 10)`, parseInt(num / Math.pow(10, i - 1)), Math.pow(10, i - 1))
  //   result.push(parseInt(num / Math.pow(10, i - 1)));
  // }
  return result;
}

// const test = NumberToArray(123);
// const test = NumberToArray(1234);
// const test = NumberToArray(12345);
const test = NumberToArray(1234567);

log(`test`, test)

refs

https://stackoverflow.com/questions/63061316/how-to-convert-a-number-to-a-number-array-in-javascript-without-convert-number-t

"use strict";

/**
 *
 * @author xgqfrms
 * @license MIT
 * @copyright xgqfrms
 * @created 2020-07-23
 * @modified
 *
 * @description
 * @difficulty Easy Medium Hard
 * @complexity O(n)
 * @augments
 * @example
 * @link
 * @solutions
 *
 */

const log = console.log;

const NumberToNumberArray = (num = 1) => {
  const result = [];
  const len = Math.ceil(Math.log10(num + 1));
  let temp = num;
  for (let i = len; i > 0; i--) {
    result.push(parseInt(temp / Math.pow(10, i - 1)));
    temp -= result[len - i] * Math.pow(10, i - 1);
  }
  return result;
}

// const test = NumberToNumberArray(123);
// const test = NumberToNumberArray(1234);
// const test = NumberToNumberArray(12345);
const test = NumberToNumberArray(1234567);

log(`test`, test)
// [1, 2, 3, 4, 5, 6, 7]

holy shit stackoverflow

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