8.4 Deeper Copy created by smillaraaq - https://repl.it/HJll/15

8.4 Deeper Copy.js

//slice() does a pass by reference not value if the value it's passing is an object!
function copy(ary){
  //loop thru ary check typeof 
  //if object loop through, copy each value individually
  var resultArray=[];
  for(var i=0;i<ary.length;i++){
    var tmpItem=copyIndefinite(ary[i]);
    // console.log(tmpItem);
    resultArray.push(tmpItem);
  }
  // console.log("sd ",resultArray)
  return resultArray;
}

var arr = [1,[2,3]];
var arrCopy = copy(arr);

arr[1].push(4);
console.log("ww",arrCopy)    // [1,[2,3]] Copy is not affected!


//bonus recursion
function copyIndefinite(item){
  //loop thru ary check typeof 
  //if object loop through, copy each value individually
  var result=0;
  var tmpItem=0;
  if(Array.isArray(item)){//check if isArray
    var tmpAry=[];
    for(var x=0;x<item.length;x++){
      tmpAry.push(item[x]);
    }
    tmpItem=tmpAry;
  }else if(typeof item==="object"){//check if any other type of object
    //push key values
    tmpItem="some obj";
  }else{
    //primitive data type
    tmpItem=item;
  }
  result=tmpItem;

  // console.log("sd ",resultArray)
  return result;
}

/* SCHOOL SOLUTION

function copy (arr) {
  var copyArr = [];
  for (var i=0; i<arr.length; i++) {
    if (Array.isArray(arr[i])) {
      var nestedCopy = [];
      for (var j=0; j<arr[i].length; j++) {
        nestedCopy.push(arr[i][j]);
      }
      copyArr.push(nestedCopy)
    } else {
      copyArr.push(arr[i]);
    }
  }

  return copyArr;
}

*/