get all fields in object that have given word and transform all values of these fields

Question

I have an object. like this, for example

{
    startDate: 2141242141,
    adress: '',
    endDate: 2141242141,
    billings: {
        startBillingDate: 2142421421421,
        endBillingDate: 2142421421421
    }
    amount: 100
}

I need to get all fields those contain word "Date" (or "date") and convert them all into string date format.

Who can help please.

What is the formula or algorithm for converting `2141242141` to a Date? Treated as milliseconds since the ECMAScript epoch it's 1970-01-26, treated as seconds it's 2037-11-08. Neither seem appropriate. For conversion to date strings, see [*Where can I find documentation on formatting a date in JavaScript?*](https://stackoverflow.com/questions/1056728/where-can-i-find-documentation-on-formatting-a-date-in-javascript) — RobG, Jul 07 '17 at 21:47

cнŝdk · Answer 1 · 2017-07-08T00:51:23.003

4

You can loop throught these properties using Object.keys().

And for each property check if its value isn't an object and contains the date string using k.match(/date/i) so change it to a date value. Otherwise if it's an object do the same with its properties in a recursive way.

This is what you need:

function transformProperties(obj) {
  Object.keys(obj).forEach(function(k) {
    if ((typeof obj[k]) !== "object" && k.match(/date/i)) {
      obj[k] = new Date(obj[k]);
    } else if ((typeof obj[k]) == "object") {
      let sub = obj[k];
      transformProperties(sub);
    }
  });
}

Demo:

var o = {
  startDate: 2141242141,
  adress: '',
  endDate: 2141242141,
  billings: {
    startBillingDate: 2142421421421,
    endBillingDate: 2142421421421
  },
  amount: 100
};

function transformProperties(obj) {
  Object.keys(obj).forEach(function(k) {
    if ((typeof obj[k]) !== "object" && k.match(/date/i)) {
      obj[k] = new Date(obj[k]);
    } else if ((typeof obj[k]) == "object") {
      let sub = obj[k];
      transformProperties(sub);
    }
  });
}

transformProperties(o);

console.log(o);

edited Jul 08 '17 at 00:51

answered Jul 07 '17 at 13:16

cнŝdk

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1

What about `startBillingDate` and `endBillingDate`? – Mikey Jul 07 '17 at 13:19
yes. I need them to. all posible fields with word Date or date with all nest – Andrii Blinov Jul 07 '17 at 13:21
@Mikey I updated my answer, my bad I missed that part. – cнŝdk Jul 07 '17 at 13:21
1

@chsdk I knew you could do it :) – Mikey Jul 07 '17 at 13:22
@AndriiBlinov Glad it helps, can you please accpet/upvote the answer? – cнŝdk Jul 07 '17 at 14:53

Teddy Sterne · Answer 2 · 2017-07-07T13:25:10.623

This recursive function should convert all the dates to ISO strings:

obj = convertDatesToString(obj);

function convertDatesToString(obj) {
    Object.keys(obj).forEach((key) => {
        if(key.toLowerCase().match(/date/)){
            obj[key] = new Date(obj[key]).toISOString();
        } else if (obj[key] instanceof Object) {
            obj[key] = convertDatesToString(obj[key]);
        }
    });

    return obj;
}

obj = {
    startDate: 2141242141,
    adress: '',
    endDate: 2141242141,
    billings: {
        startBillingDate: 2142421421421,
        endBillingDate: 2142421421421
    },
    amount: 100
};

obj = convertDatesToString(obj);
console.log(obj);

function convertDatesToString(obj) {
    Object.keys(obj).forEach((key) => {
        if(key.toLowerCase().match(/date/)){
            obj[key] = new Date(obj[key]).toISOString();
        } else if (obj[key] instanceof Object) {
            obj[key] = convertDatesToString(obj[key]);
        }
    });

    return obj;
}

score 0 · Answer 3 · answered Jul 07 '17 at 13:24

I would create a function to iterate object's properties recursively, and later I would call the whole function to produce the whole transformations:

function forEachProperty(obj, actionFn) {
  Object.keys(obj).forEach(
    property => {
      actionFn(obj, property);

      if (typeof obj[property] == "object") {
        forEachProperty(obj[property], actionFn);
      }
    }
  );
}

var obj = {
  startDate: 2141242141,
  adress: '',
  endDate: 2141242141,
  billings: {
    startBillingDate: 2142421421421,
    endBillingDate: 2142421421421
  },
  amount: 100
};

forEachProperty(obj, (obj, property) => {
  if (property.toLowerCase().includes("date")) {
    obj[property] = new Date(obj[property]);
  }
});

console.log(JSON.stringify(obj));

get all fields in object that have given word and transform all values of these fields

3 Answers3