Access JSON data with string path?

Question

var give = \'i.want.it\';

var obj = {
    i: {
        want: {
            it: \'Oh I know you do...\'
        }
    }
};

console.log(obj[give]); // \'Oh I know yo         


        

Answer 1

This will work :

var give = 'i.want.it';

var obj = {
  i: {
    want: {
      it: 'Oh I know you do...'
    }
  }
};

console.log( eval("obj."+give));

Live DEMO JSFiddle

This is a really easy way to do it, but not safe, i don't advise you to use it for professional use. Use previous answer they looks good.

Answer 2

Use Array#reduce() method

var give = 'i.want.it';

var obj = {
  i: {
    want: {
      it: 'Oh I know you do...'
    }
  }
};


var res = give.split('.').reduce(function(o, k) {
  return o && o[k];
}, obj);

console.log(res);

Answer 3

make it

var obj = {
    i: {
        want: {
            it: 'Oh I know you do...'
        }
    }
};
//var result = JSON.parse(JSON.stringify(obj)); //cloning the existing obj
var result = obj; //cloning the existing obj
var give = 'i.want.it';

//now split the give and iterate through keys
give.split(".").forEach(function(key){
  result = result[key];
});
console.log(result);

Answer 4

You can use eval()

var obj = {"a": { "b": { "c": 3}}}; writeln(eval('obj.a.b.c') + 2);

This will output 5.

JavaScript is weakly typed and thus it's evaluation function executes a statement as well as evaluating an expression.