Comprehensive and Detailed In-Depth Explanation:
In UiPath, when we need to store unique values and allow fast lookups, the best data structure is HashSet (Of String).
Step-by-Step Execution Guide:
* Declare a HashSet in UiPath:
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Dim emailSet As New HashSet(Of String)
* Add unique email addresses:
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emailSet.Add("[email protected]")
emailSet.Add("[email protected]")
emailSet.Add("[email protected]") ' Duplicate entry will be ignored
* Check if an email exists:
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If emailSet.Contains("[email protected]") Then
Console.WriteLine("Email exists!")
End If
# HashSet ensures that duplicates are automatically ignored and lookups are extremely fast (O(1) complexity).
Real-World Use Case:
# Email Filtering System
* A bot processes thousands of emails and must ensure that duplicate addresses are ignored.
* Using a List(Of String) would require manual duplicate checking, whereas HashSet(Of String) automatically prevents duplicates.
Why the other options are incorrect?
# A. Array - Arrays have fixed sizes and do not support efficient lookups or uniqueness checks.# B. List (Of String) - Lists allow duplicates, requiring manual checking (.Contains()) before adding items.# C.
Dictionary(Of String, Boolean) - Although it can simulate a HashSet, it requires more memory due to key- value pairs.
# Reference:
* UiPath Documentation: Collections and HashSet
* Microsoft VB.NET Docs: HashSet Class