peterlikesnoodles

const eva = (str) => add(str)

const add = str => str.split('+').reduce((total, exp) => {
  const s = exp.trim()
  const num = Number(s)
  return total + (isNaN(num) ? subtract(s) : num)
}, 0)

const subtract = str => str.split('-').reduce((total, exp, index) => {
  const s = exp.trim()

peterlikesnoodles

/**
 * str 结构是 `${str1} ${str2}`.
 * 二个字符串用空格分开。
 *
 * str1 描述以下3种规则：
 * - + 匹配单一写了字符
 * - * 匹配3个连续的相同字符
 * - *{N} 匹配 N 个连续的相同字符（比如 *{12} 匹配12个相同字符）
 * @returns str2 是否完全符合 str1 的格式表示
 */

peterlikesnoodles

Keybase proof

I hereby claim:

• I am peterlikesnoodles on github.
• I am wanglu (https://keybase.io/wanglu) on keybase.
• I have a public key ASB_igEyJpnVR-5Jke6V9Rd-gKMsgKU-lq6oeZ10R4grhAo

To claim this, I am signing this object: