「评论」正则表达式 about blog HOT 5 OPEN

export const addSeparator = (str = '', sep = ',') => {
  str += '';
  const arr = str.split('.'),
    reg = /(?=((?!\b)\d{3})+$)/g
  let integer = arr[0],
    decimal = arr.length > 1 ? arr[0] : '';
  integer = integer.replace(reg, sep);
  return integer + decimal;
}

const addSeparator = (str = '', sep = ',') => {
  str += '';
  const arr = str.split('.'),
    reg = /(?=((?!\b)\d{3})+$)/g
  let integer = arr[0],
    decimal = arr.length <= 1 ? '' : `.${arr[1]}`;
  integer = integer.replace(reg, sep);
  return integer + decimal;
}

console.log(addSeparator(-10000.23)); // -10,000.23
console.log(addSeparator(100)); // 100
console.log(addSeparator(1234, ";")); // 1;234