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How to access a hashtable's first value without knowing the key?


By : SuperValue
Date : October 15 2020, 08:10 AM
seems to work fine The Keys property is an ICollection, not an IList, so it can't be indexed. ICollection is basically just IEnumerable with a Count property, so you should treat is the same way as an IEnumerable. That means enumerating it to get the first item. You can use LINQ:
code :
Dim firstKey = myHashtable.Keys.Cast(Of Object)().FirstOrDefault()
Dim firstKey As Object

For Each key In myHashtable.Keys
    firstKey = key
    Exit For
Next


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How to access the dom by knowing the value of a node && Getting the index of accordion by just knowing value


By : snaps
Date : March 29 2020, 07:55 AM

How can I access the objects that are imported without knowing their name?


By : padmini
Date : March 29 2020, 07:55 AM
I wish did fix the issue. Don't put the original regexps in separate variables, just put them in a list:
code :
regex_list = [
    {start: r"some start pattern", end: r"some stop pattern"},
    {start: r"some other start pattern", end: r"some other end pattern"},
    ...
]

for regexes in regex_list:
    do someting with regexes.start and regexes.end

Access object without knowing the name beforehand


By : user3040395
Date : March 29 2020, 07:55 AM
To fix this issue You shouldn't pass the controls' name. You'll be better off by passing a reference to that object, which you already have in the eventhandler:
code :
private void pb1_Click(object sender, EventArgs e)
{
    SwapImages(sender as PictureBox);
}

private void SwapImages(PictureBox pb)
{   
    if (pb.Image == img1)
    {
        pb.Image = img2;                    
    }            
}

AngularFire 2 access value without knowing ID


By : Bruno Almeida
Date : March 29 2020, 07:55 AM
wish helps you I recreated your data structure, and seems like you miss the following option when you create the reference: { preserveSnapshot: true }
The following creates your desired array:
code :
af.database.list('/chats/chatroom').subscribe(items => {
  console.log(items);
  items.forEach(snapshot => {
    console.log(snapshot);
    this.msg.push(snapshot.val().msg);
  })

Hashtables from ConvertFrom-json have different type from powershells built-in hashtables, how do I make them the same?


By : Ben
Date : March 29 2020, 07:55 AM
With these it helps The ConvertFrom-Json cmdlet gives you a custom object so you have to access them using dot notation rather than as a subscript. Usually you would know what fields you expect in the JSON so this is actually more useful in general than getting a hash table. Rather than fighting the system by converting back to a hash table, I suggest you work with it.
You can use select with wildcard property names to get at the properties:
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