Calling variables outside of a function in javascript

Question

I'm new to javascript and firebase. I would just like to ask if there is a chance to call my variables outside of my function?

Here is my sample code:

function gotData (data) {
  console.log(data.val())
  var promotions = data.val()
  var keys = Object.keys(promotions)
  console.log(keys)
  for (var i = 0; i < keys.length; i++) {
    var k = keys[i]
    var name = promotions[k].promotionName
    var description = promotions[k].description
    var validityFrom = promotions[k].validityPeriodFrom
    var validityTo = promotions[k].validityPeriodTo
    var dateCreated = promotions[k].dateCreated
    var dateUpdated = promotions[k].dateUpdated
    console.log(name, description, validityFrom, validityTo, dateCreated, dateUpdated)
  }
}

Can I call name, description, validityFrom, etc outside of the function gotData? I'll appreciate a help. Thank you in advance! :)

Short answer: no. Here is a page about "variable scope": w3schools.com/js/js_scope.asp — ADreNaLiNe-DJ
– ADreNaLiNe-DJ, Commented Sep 13, 2017 at 8:24
Can you show the code of call my variables inside of a function outside of it? — m00n
– m00n, Commented Sep 13, 2017 at 8:24

Jigar Shah · Accepted Answer · 2017-09-13 08:44:14Z

3

Define variable as global variable

//above function
var name, description, validityFrom, validityTo, dateCreated, dateUpdated;
function gotData (data) {
  console.log(data.val())
  var promotions = data.val()
  var keys = Object.keys(promotions)
  console.log(keys)
  for (var i = 0; i < keys.length; i++) {
    var k = keys[i]
    name = promotions[k].promotionName
    description = promotions[k].description
    validityFrom = promotions[k].validityPeriodFrom
    validityTo = promotions[k].validityPeriodTo
    dateCreated = promotions[k].dateCreated
    dateUpdated = promotions[k].dateUpdated
    console.log(name, description, validityFrom, validityTo, dateCreated, dateUpdated)
  }
}
// now you can access variables here
console.log(name, description, validityFrom, validityTo, dateCreated, dateUpdated)

EDIT

You can create an array to get all variables as you may have multidimensional data

var objData = [];
function gotData (data) {

  console.log(data.val())
  var promotions = data.val()
  var keys = Object.keys(promotions)

  for (var i = 0; i < keys.length; i++) {
    var tempObj = [];
    var k = keys[i]
    tempObj['promotionName'] = promotions[k].promotionName;
    tempObj['description'] = promotions[k].description;
    tempObj['validityPeriodFrom'] = promotions[k].validityPeriodFrom;
    tempObj['validityPeriodTo'] = promotions[k].validityPeriodTo;
    tempObj['dateCreated'] = promotions[k].dateCreated;
    tempObj['dateUpdated'] = promotions[k].dateUpdated;

    objData.push(tempObj);
  }
  console.log(objData)
}

edited Sep 13, 2017 at 8:44

answered Sep 13, 2017 at 8:24

Jigar Shah

6,2332 gold badges32 silver badges41 bronze badges

Sign up to request clarification or add additional context in comments.

5 Comments

Mehravish Temkar Over a year ago

The values are assigned in a loop so they keep changing. This might not help much.

Dellirium Over a year ago

Well, which ones from the loop he wants to access then, can't have it both ways

Mehravish Temkar Over a year ago

An array should do the work. Not arrays of description, name, etc but multi dimensional array with indexes as description, name, etc. The array can be returned in the end of the function instead of global variables.

Mehravish Temkar Over a year ago

This still can be improved as now it is difficult to figure out which one is the name or description

Jigar Shah Over a year ago

added associative array code, but by doing this some array methods may not have accurate result :)

Collectives™ on Stack Overflow

Calling variables outside of a function in javascript

1 Answer 1

5 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

5 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related