How to run through array on Javascript?

Question

I'm stuck retrieving all values from capacitor storage on Ionic 5, I'm retrieving all the time ZoneAwarePromise or Array Iterator, how to deal with it?

Thank you

//MAIN.ts

ngOnInit() {    
    let vaya = this.storage.keys()
    .then(result => {
      return result
    });
    vaya.then(data => {
      for (let item of data) {
        console.log(this.storage.getItem(item))
      }
      
    })
  }

//SERVICE STORAGE.ts

async keys() {
    const { keys } = await Storage.keys();
    console.log('Got keys: ', keys);
    return keys
}

Sergey Rudenko · Accepted Answer · 2020-08-23 15:47:33Z

1

Capacitor Storage is asynchronous so to retrieve all the values it has you need to:

Make sure Capacitor has initialized
Obtain the keys
Write a loop that can do async processing

This should work (this will retrieve data sequentially):

ngOnInit() {  
    let values = [];  
    this.storage.keys().then(async (keys) => {
      for (let key of keys) {
        let value = await this.storage.get(key)
        values.push(value)
      };
    });
  }

You can also make the promises run in parallel:

  ngOnInit() {  
    let values = [];  
    this.storage.keys().then(async (keys) => {
      const promises = keys.map(key => this.storage.get(key))
      values = await Promise.all(promises);
    });
  }

edited Aug 23, 2020 at 15:47

answered Aug 23, 2020 at 15:37

Sergey Rudenko

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6 Comments

M. Mariscal Over a year ago

Thank you i did it, can you tell me how to see the result at the same moment? i have to refresh the page to see the changes

M. Mariscal Over a year ago

Also it would be nice if i can ordered them by id (1,2,3...)

Sergey Rudenko Over a year ago

hm can you elaborate? by see result you mean console or?

M. Mariscal Over a year ago

i meant in the app, when its already saved on the storage, in other tabs should appear the new one, but only appears when its refreshed the app(F5 on browser), oh sorry about the numbers, the key is :0,1,2,3 and the value is the text, then i just want to make sure it's ordered by numbers

M. Mariscal Over a year ago

nothing? i still need why i need to refresh it to see the new result

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