I'm getting an object even though I'm returning an array from my javascript function

Question

I have a function in a javascript file where I return an array. But when I call this function, when I look at the type with the "typeof" command, it returns an object instead of an array.

My javascript file is here.

import {useStore} from "vuex";
import {computed} from "vue";

export const getActions = (menuId) => {
   const store = useStore()
    const loginInfo = computed(() => {
        return store.state.Identity.loginInfo
    });
    const actions = []
    loginInfo.value.Authorization.forEach((x)=>{
        let splitData = x.Id.split('-')
        if(splitData[0] === '02' && splitData[1] === menuId){
            if(!actions.some(item => item.Id === splitData[2]))
                actions.push({
                    Id:splitData[2],
                    Definition: x.Definition,
                    Clicked:false
                })
        }
    })
    return actions;
}

Here is where I call and use this function.

 let actions =[]
    actions =  getActions(props.menuId)
      for(let i=0; actions.length;i++){
        if(props.actionId === actions[i].Id)
          return isAuth.value = false
        else
          isAuth.value = true
      }

Although my variable named actions is an array, it sees it as an object and my computer starts freezing. My computer's fan starts running very fast and chrome starts to freeze.

typeof [] -> "object". Have you read e.g. stackoverflow.com/q/12996871/3001761? It's unclear how if at all that's related to the performance issue. — jonrsharpe
– jonrsharpe, Commented May 29, 2022 at 15:58
yes, I read it and I think it doesn't have an exact equivalent in javascript. But my problem is that when I call this function, even though I return the function as an array, why does it return an object object to me. @jonrsharpe — Celal Poyraz
– Celal Poyraz, Commented May 29, 2022 at 16:02
An array is an object. It's unclear how you think that relates to your actual problem. — jonrsharpe
– jonrsharpe, Commented May 29, 2022 at 16:03
Your for loop is going to run forever, which might be why your browser is freezing and consuming all available CPU; the loop never yields. Also, based on your usage of actions, you almost certainly want a Map and not an array. — Dan
– Dan, Commented May 29, 2022 at 16:04

Nikola Pavicevic · Accepted Answer · 2022-05-29 15:59:26Z

2

You didn't set your loop right:

for(let i = 0; i < actions.length; i++){

answered May 29, 2022 at 15:59

Nikola Pavicevic

23.6k9 gold badges30 silver badges52 bronze badges

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

3 Comments

Celal Poyraz Over a year ago

how so? I already did as you wrote above. What is wrong?

Dan Over a year ago

Your code sample does not include i <. The second term in the loop is just actions.length which will always be truthy as long as there are items in the array.

Nikola Pavicevic Over a year ago

@Celal Poyraz you are welcome mate, cheers :)

Collectives™ on Stack Overflow

I'm getting an object even though I'm returning an array from my javascript function

1 Answer 1

3 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

3 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related