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JS array string patch name for array (object)

I am having problems with js array. I have a patch name (string) similar to "user.joey.friends.0.franc") and I need to "compress" to look like this:

console.log( parseArray( "user.joey.friends.0.franc" ) );
//Object {
            user: {
                joey: {
                    friends: {
                        0: {
                            franc: 1
                        }
                    }
                }
            }
        }

Any ideas how to do this?

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3 answers


Here's a non-recursive way to get the most of the path from you.



function compress(str) {
    var split = str.split('.'), obj = {}, current = obj, i;

    for (i = 0; i < split.length; i++){
        current[split[i]] =  {} ;
        current = current[split[i]];
    }

    return obj;
}
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If you say that you have an object with the structure you specified and you are trying to find a property defined by your string "user.joey.friends.0.franc"

, this is a pretty simple loop: Live example



function findProperty(obj, path) {
    var steps = path.split(/\./);
    var step;
    var n;
    for (n = 0; n < steps.length; ++n) {
        step = steps[n];
        if (!(step in obj)) {
            return undefined;
        }
        obj = obj[step];
    }
    return obj;
}

var a =  {
  user: {
    joey: {
      friends: {
        0: {
          franc: 1
        }
      }
    }
  }
};

console.log(findProperty(a, "user.joey.friends.0.franc")); // "1"
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If you are trying to create an object from a string, this solution is what I am currently using until I find something better (I believe this is based on Yahoo's namespacing method):

function createObject() {
  var a = arguments, i, j, d, _this;
  var out = {};
  for (i = 0; i < a.length; i = i + 1) {
    d = a[i].split('.');
    out2 = out;
    for (j = 0; j < d.length; j = j + 1) {
      out2[d[j]] = out2[d[j]] || {};
      out2 = out2[d[j]];
    }
  }
  return out;
}

createObject('user.joey.friends.0.franc');

DEMO

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