javascript - Where am I going wrong in my recursive function? -

i working on learning project requires me implement recursive function stringifies passed in object, without using json.stringify. have consider data types parameters function receive, , while fine that, seem getting confused when array/object passed, , call function on iterate on object contents. not doing right , every change make impacting other areas thought had completed frustration starting win battle. areas need on:

1. output elements of array/object in same way json.stringify when call function on itself. example of issue see is, if pass array ["so"], am getting [so] returned, looks have possibility covered!

2. what when function passed param, not allowed.

here have far. appreciate can offer.

var myjsonrecursivefunc = function (obj) {      var stringed = "";     var result;      if (number.isinteger(obj)) {         return "" + obj + "";     } else if (obj === null) {         return "" + null + "";     } else if (typeof obj === "boolean") {         return "" + obj + "";     } else if (typeof obj === "string") {         return '"' + obj + '"';     } else if (array.isarray(obj)) {         if (obj.length === 0) {             return "[" + obj + "]";         }         (var = 0; < obj.length; i++) {             if (array.isarray(i)) {                 myjsonrecursivefunc(i);             } else {                 stringed += "" + obj[i] + ""             }         }         return result = "[" + stringed + "]";     } else {         (var val in obj) {             if (typeof val === "object") {                 myjsonrecursivefunc(val);             }             stringed += "" + val + "" + ":" + "" + obj[val] + "" + '';         }         return result = "{" + stringed + "}";     } }; 

it far perfect still learning please let me know can improve along in getting work is.

output elements of array/object in same way json.stringify when call function on itself. example of issue see is, if pass array ["so"], am getting [so] returned, looks have possibility covered!

your recursion of var val in obj passing in val, key of obj. need call myjsonrecursivefunc(obj[val]) in order right result. additionally, true array. if statement needs check see if obj[i] array, not i integer. in case, need say:

if (array.isarray(obj[i])) {   myjsonrecursivefunc(obj[i]) } 

what when function passed param, not allowed.

you need have check see if function being passed in function, typeof, such as: if (typeof func === function)

this pretty fun exercise. did few months back, , had access underscore library so. here's working code:

var stringifyjson = function(obj) {   //strings , null should addressed here. strings have quotes inside string can't lump them booleans , numbers.   if (_.isstring(obj)){     return '"' + obj.split('"').join('\\"') + '"';   }   if (_.isnull(obj)){     return 'null';   }   //arrays temporary array stringified elements pushed to, , temporary array joined , concatenated brackets exist within returned string.   if (_.isarray(obj)){     var temparr = [];       _.each(obj, function(elem){         temparr.push(stringifyjson(elem));       });     return '[' + temparr.join(',') + ']';   }   //objects temporary string add stringified data to. including check undefined values , function keys.   if (_.isobject(obj)){       var temparr = [];       (var k in obj){         if (_.isundefined(obj[k]) || _.isfunction(k)){           return '{}';         } else {           temparr.push(stringifyjson(k) + ':' + stringifyjson(obj[k]));         }       }       return '{' + temparr.join(', ') + '}';   }   //everything else = booleans, numbers   else {     return obj.tostring();   } };