【JS笔记】判断某数是否属于给定范围

let at = (num,range)=>{
let min = range[1];
let max = range[3];
let lEq = /^[/.test(range);
let rEq = /]$/.test(range);
if(lEq&&rEq&&min<=num&&num<=max){
return true
}else if(!lEq&&!rEq&&min<num&&num<max){
return true
}else if(!lEq&&rEq&&min<num&&num<=max){
return true
}else if(lEq&&!rEq&&min<=num&&num<max){
return true
}else{
return false
}
}
console.log(at(5,”(2,5]”))