//separate repeated characters and unique characters from an array.
 
const input = [3,5,3,2,4,6,3,5,6,7,3,5]
// output-
// [2,4,7]
// [3,5,6]

const extract = (arr) => {
   
    const obj3 = {}
    for(value of arr){
        obj3[value] = (obj3[value] || 0) + 1
    }
            
    const uniqueElem = []
    const repeatedElem = []
    for(const [key, value] of Object.entries(obj3)){
        console.log(value)
        if(value ==1){
            uniqueElem.push(key)
        }else{
            repeatedElem.push(key)
        }
        
    }
    return {uniqueElem, repeatedElem}
}
console.log(extract(input))