Creating custom object from array

Question

I have an array with below elements. I am trying to create an object from the array

var arr = [
  'find({ qty: { $lt: 20 } } )',
  'limit(5)',
  'skip(0)'
]

Below is my code. where I am getting only values as the output. Any help on this will be helpful

for (var i = 0; i < arr.length; i++) {
        var res = arr[i].search(/\(/ig)
        if (res!= -1) {
            var result = arr[i].split("(");
            result = result[1].slice(0, -1))
        }
    }

Expected Output

 {
      "action": "find",
      "value": "{ qty: { $lt: 20 } }",
      "limit": 5,
      "skip": 0
    }

georg · Accepted Answer · 2015-03-13 07:17:48Z

3

match is better than split for this kind of stuff

var arr = [
  'find({ qty: { $lt: 20 } } )',
  'limit(5)',
  'skip(0)'
]


var obj = {};

arr.forEach(function(x, n) {
  var m = x.match(/(\w+)\(\s*(.+?)\s*\)/);
  if(n == 0) {
    obj.action = m[1];
    obj.value = m[2];
  } else
    obj[m[1]] = m[2];
    
});

document.write("<pre>" + JSON.stringify(obj,0,3));

answered Mar 13, 2015 at 7:17

georg

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4 Comments

user4324324 Over a year ago

Thanks all for helping me. Now Im getting the expected output. Is it possible to make the value as Object not as string ({ qty: { $lt: 20 } }). { "action": "find", "value": "{ qty: { $lt: 20 } }", "limit": 5, "skip": 0 }

user4324324 Over a year ago

@mish Your code is working buthas one major flaw. { "action": "find", "value": "{ qty: { $lt: 20 } }", "limit": "5", "skip": "0" } Values are getting converted to string. Eg. "limit":5

mish Over a year ago

@user4324324: I didn't answer - whose code are you referring to?

user4324324 Over a year ago

@mish My mistake. I apologize for it. :)

Naeem Shaikh · Accepted Answer · 2015-03-13 07:24:12Z

2

see this fiddle

Just check if element is first in array, if yes, set action and value keys to splitted array, else just assign splitted values to key and value respectively

var arr = [
  'find({ qty: { $lt: 20 } } )',
  'limit(5)',
  'skip(0)'
]
var result = {};
for (var i = 0; i < arr.length; i++) {
  var res = arr[i].split("(")
  console.log(res)
  result[res[0]] = res[1].split(')')[0]
}

document.write(JSON.stringify(result))

edited Mar 13, 2015 at 7:24

answered Mar 13, 2015 at 7:17

Naeem Shaikh

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