AngularJS - Getting all keys from an object

Question

I want to be able to get all the keys from an object. Assuming the object looks like below:

            this.reservation = {
            "Firstname" : "" ,
            "Lastname" :"" ,
            "Phone" : "",
            "Email" : "",
            "Date" : "yyyy-mm-dd hh:mm",
            "Starthour" : "",
            "Endhour" : "",
            "Persons" : ""
        }

If I want to be able to check whether all the keys' values are "", except Date of course, how would I go about doing that?

I've tried to do a forEach to get the keys:

            angular.forEach(this.reservation,
            function(value, key) {
                console.log(key);
            });

But it doesn't work. Any hints?

Sajeetharan · Accepted Answer · 2017-01-10 11:19:18Z

9

try this,

Object.keys(reservation);

answered Jan 10, 2017 at 11:19

Sajeetharan

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Comments

Ovidiu Dolha · Accepted Answer · 2017-01-10 11:19:13Z

1

You can use Object.keys and some functional Array methods

var allEmptyExceptDate = Object.keys(this.reservation)
  .filter(function(key) { return key !== 'Date'; }) // all except 'Date'
  .every(function(key) { return !this.reservation[key] })  // are falsy (i.e. empty or undefined or null) - or you can use this.reservation[key] === '' for a more precise check

answered Jan 10, 2017 at 11:19

Ovidiu Dolha

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Comments

Rahul Arora · Accepted Answer · 2017-01-11 04:40:10Z

0

For objects you can use the for in loop

Pure javascript way of doing this:

for(prop in this.reservation){ 
    if(typeof this.reservation[prop] === "string"){
         console.log(prop + 'value ' + "is a string");
    } 
}

Angular way:

angular.forEach(this.reservation, function(value, key){
    if(typeof value === "string"){
        console.log(value + ' is of type string');
    }
}

edited Jan 11, 2017 at 4:40

answered Jan 10, 2017 at 11:28

Rahul Arora

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1 Comment

Ankh Over a year ago

Urm.. angular.forEach can definitely iterate through objects.

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