CODEWITHSUNDEEP
angulartypescriptionic-framework
this.jind
this.jind

Reputation: 349

How to convert a string to a boolean?

I'm retreiving some information from a server, and I'm getting let's say settings.notificationOn = "T" when the notifications are on, and settings.notificationOn = "F". I want to save it into a variable(notify: boolean) that is boolean. And I want to use this variable in an ion-toggle, that will be checked true when notify is true and not checked when notify is false. How can I do this?

Thanks

Upvotes: 0

Views: 259

Answers (5)

StPaulis
StPaulis

Reputation: 2916

To be sure that notificationOn has not any bad values you can do it like this:

const notify: boolean = this.getNotificationStatus(settings);

getNotificationStatus(settings: { notificationOn: 'T' | 'F' }): boolean {
  if (settings.notificationOn === "T") return true;
  if (settings.notificationOn === "F") return false;
  throw new Error("/* Your error here */");
}

Upvotes: 1

Chen Litchian
Chen Litchian

Reputation: 111

if "T" then true, else false.

const notify: boolean = settings.notificationOn === "T" ? true : false;

Upvotes: 0

Quentin Fonck
Quentin Fonck

Reputation: 1315

Simply do:

const notify: boolean = (settings.notificationOn === "T");

Upvotes: 1

Ayoub Touba
Ayoub Touba

Reputation: 2987

You can simply do:

notify: boolean =  settings.notificationOn == "T" ? true : false ;

Upvotes: 1

Yair Cohen
Yair Cohen

Reputation: 2248

If it's a string that has either 'F' or 'T' then you can use the following code:

const notify = settings.notificationOn === 'T';

Short explanation:

You are assigning to the notify variable the result from the expression of whether settings.notificationOn is equal to 'T'. If it is, value will be true, else, false.

Upvotes: 0

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