题解 | HJ66 配置文件恢复

const twoStrMap = {
  'reset board': 'board fault',
  'board add': 'where to add',
  'board delete': 'no board at all',
  'reboot backplane': 'impossible',
  'backplane abort': 'install first'
}
const errMsg = 'unknown command'
let line = ''
while(line = readline()) {
  if(line.indexOf(" ") === -1) { // 单字符串
    if(line.startsWith("r") && "reset".includes(line)) {
      print("reset what")
    } else {
      print(errMsg)
    }
  } else {  //  多字符串
    const lineList = line.split(" ")
    if(lineList.length > 2) {
      print(errMsg)
    } else {
      let count = 0
      let res = ''
      for(key in twoStrMap) {
        let keyList = key.split(" ")
        if(lineList[0].startsWith(keyList[0][0]) && keyList[0].includes(lineList[0]) && 
          lineList[1].startsWith(keyList[1][0]) && keyList[1].includes(lineList[1])) {
          count++
          res = twoStrMap[key]
        }
      }
      if(count !== 1) {
        print(errMsg)
      } else {
        print(res)
      }
    }
  }
}