30秒学会 JavaScript 片段 · 2023年10月18日

30秒学会 JavaScript 片段 – Digitize number

Converts a number to an array of digits, removing its sign if necessary.

  • Use Math.abs() to strip the number’s sign.
  • Convert the number to a string, using the spread operator (...) to build an array.
  • Use Array.prototype.map() and parseInt() to transform each value to an integer.

代码实现

const digitize = n => [...`${Math.abs(n)}`].map(i => parseInt(i));

digitize(123); // [1, 2, 3]
digitize(-123); // [1, 2, 3]

翻译自:https://www.30secondsofcode.org/js/s/digitize-number