CODEWITHSUNDEEP
angulartypescript
Héloïse Chauvel
Héloïse Chauvel

Reputation: 542

Get index of enum value typescript

I have the following string enum:

export enum RecordStatus {
   ONGOING_ADMINISTRATIVE_ANALYSIS = 'ONGOING_ADMINISTRATIVE_ANALYSIS',

   ONGOING_TECHNICAL_ANALYSIS = 'ONGOING_TECHNICAL_ANALYSIS',

   COMPLETED_APPLICATION = 'COMPLETED_APPLICATION'
}

I have the following function:

setTimelineStatus(status: RecordStatus) : void {
    console.log("State :" + status); // ON_GOING_TECHNICAL_ANALYSIS

    console.log(RecordStatus.valueOf(status).ordinal()); // doesn't work. Should print 1

    console.log(RecordStatus.valueOf("ON_GOING_TECHNICAL_ANALYSIS").ordinal()); // doesn't work either. Should print 1
}

This function retrieves a set enum as parameter, for example RecordStatus.ON_GOING_TECHNICAL_ANALYSIS. I want to get the index (it should be 1 in above case). I tried the solution in this thread Get index of enum from string? but I've got this error:

Error

I don't understand why I have this error. I only want the index of the enum value.

Upvotes: 16

Views: 15323

Answers (2)

HamidReza
HamidReza

Reputation: 1934

This code returns the index of enum item. Besides it TypeScript-guarded, i.e. would not allow to make a mistake in the enum item identifier, provided your IDE supports TypeScript:

Object.values(RecordStatus).indexOf(RecordStatus.ONGOING_ADMINISTRATIVE_ANALYSIS)

Upvotes: 2

saulmaldonado
saulmaldonado

Reputation: 756

The post you are refering to is for enums in Java.

In TypeScript, enum are considered objects at runtime so you can just iterate over the keys of the enum until you find the one you're looking for.

Object.keys(RecordStatus).indexOf('ON_GOING_TECHNICAL_ANALYSIS');

Upvotes: 18

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