长度区间校验公共方法，引入棉花糖

 

 

const notShorter = (o, minLen) => {

if (o.length < minLen) {

return false

}

return true

}

const notLonger = (o, maxLen) => {

if (o.length > maxLen) {

return false

}

return true

}

const isInClosedInterval = (o, minLen, maxLen) => {

return notShorter(o, minLen) && notLonger(o, maxLen)

}