Js returns the desired value recursively

  let a = [{
        "k": [{
          "k": [{
            "k": [{
              "name": "4"
            },{
              "name": "5"
            }],
            "name": "2"
          }],
          "name": "1"
        }],
        "name": "0"
      }, 
      {
        "k": [{
          "k": [{
            "k": [{
              "name": "44"
            }],
            "name": "22"
          }],
          "name": "11"
        }],
        "name": "00"
      }]
      
      // 
      ["0-1-2-3-4","0-1-2-3-5", "00-11-22-33-44"]
Javascript
Mar.21,2021

Brother, you don't have 3 in a, how do you expect to output 3? 

function _concat(arr){
    var resulte = [], str = ''
    !function loop(arr,str){
        arr.forEach(item => {
            var s = str + '-' + item.name; 
            Object.prototype.toString.apply(item.k) === "[object Array]" ? loop(item.k,s) : resulte.push(s.replace('-',''))
        })
    }(arr,str)
    return resulte
}
_concat(a)

Previous: Nginx uses https proxy Spring boot to always jump to http

Next: On the Choice of (Hbuild), Packaging and UI Framework for WEB APP Development

css mysql arrays josn react html typescript webpack npm sass R objective-c .net sql-server jquery python-3.x angularjs django angular excel regex iphone ajax linux xml pandas vba spring database wordpress string wpf xcode windows bash postgresql oracle multithreading eclipse list firebase algorithm macos forms image scala visual-studio azure bootstrap spring-boot react-native python-2.7 docker performance function winforms matlab powershell apache dataframe api sqlite numpy rest shell selenium flutter dart maven loops qt swing android-studio csv express file class tensorflow sorting codeigniter perl
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b3741a-410bd.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3741a-410bd.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?