Variable in object path

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Variable in object path

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#1 by (2 votes)

2

I'm doing a personal project where I try to recover JavaScript Objects through URL, a kind of RESTful service so I need to convert the routes of my URL in JSON routes to recover the object in question, I do this from the following way:

Turning from URL to JSON PATH :

var path = "/example/to/object";
path = path.slice(1).replace(/[\/|\]/g, ".");

This results in:

=> path = "example.to.object";

My object:

var obj = {
  "username":"denyncrawford",
  "example": {
      "to": {
        "object": {}
      }
    }
}

Now, the problem is that normally if I want to use a variable to locate the key of an object I use the following syntax obj[variable] , but in this case using obj[path] returns undefined .

How could I solve it? o Is there a way ( better ) to do what I want?

Functional example:

var str = "/denyncrawford/img";
str = str
.slice(1)
.replace(/[\/|\]/g, ".");

str2 = str
.replace(/[\/|\]/g, "."); // Sin slice().

var obj = {
  "username":"denyncrawford",
  "denyncrawford": {
    "img":"denyn.png"
  }
}

console.log(str);
console.log(obj[str]);
console.log(obj[str2]);

Thank you very much!

javascript json object url objeto

asked by Dєηyη Crawford 27.12.2018 в 21:27

source

1 answer

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score 2 · Accepted Answer

try this way:

 var str = "/denyncrawford/img";
 str = str.slice(1).replace(/[\/|\]/g, ".");

 str2 = str.replace(/[\/|\]/g, "."); // Sin slice().

 var obj = {
   "username":"denyncrawford",
   "denyncrawford": {
       "img":"denyn.png"
    }
}

var objeTemp = obj;
var prop = str.split(".");
for (var i in prop) {

  if (objeTemp.hasOwnProperty(prop[i])) {
    objeTemp = objeTemp[prop[i]];
  }
}

console.log(objeTemp);