将 153812.7 转化为 153,812.7

[lgwebdream]

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[lgwebdream]

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[GolderBrother]

function parseMoney(num) {
    let [interger, decimal ] = String.prototype.split.call(num, '.');
    interger = interger.replace(/\d{1,3}(?=(\d{3})+$)/g, '$&,');
    decimal = decimal ? `.${decimal}` : '';
    return interger + decimal;
}
console.log(parseMoney(153812.7));

[gaohan1994]

const splitNumber = num => {
  const base = `${Number(num)}`;
  const [integer, decimal] = base.split(".");

  let result = "";
  let currentNumber = "";

  for (let index = integer.length - 1; index >= 0; index--) {
    const char = integer[index];

    if (char && currentNumber.length < 3) {
      console.log("currentNumber length < 3 should add to current number");
      currentNumber = `${char}${currentNumber}`;
    }

    if (currentNumber.length === 3) {
      result = `${index !== 0 ? "," : ""}${currentNumber}${result}`;
      currentNumber = "";
      console.log("currentNumber = 3 should add to result, after added result: ", result);
    }
  }

  if (decimal) {
    result = `${result}.${decimal}`;
  }

  return result;
};