How do you check if a list is null?

Emil Satterfield asked a question: How do you check if a list is null?
Asked By: Emil Satterfield
Date created: Thu, Nov 4, 2021 3:19 PM
Date updated: Sat, May 14, 2022 8:43 AM


Top best answers to the question «How do you check if a list is null»

You should do if(test!= null) instead (Checking for null first). The method isEmpty() returns true, if an ArrayList object contains no elements; false otherwise (for that the List must first be instantiated that is in your case is null ).


Those who are looking for an answer to the question «How do you check if a list is null?» often ask the following questions:

❓ How check array is null or not in php?

  1. Using count Function: This function counts all the elements in an array. If number of elements in array is zero, then it will display empty array. Syntax: ...
  2. Using sizeof() function: This method check the size of array. If the size of array is zero then array is empty otherwise array is not empty. Example:

❓ How do i check if a string is empty or null?

Using the isEmpty() Method

The isEmpty() method returns true or false depending on whether or not our string contains any text. It's easily chainable with a string == null check, and can even differentiate between blank and empty strings: String string = "Hello there"; if (string == null || string.

❓ How check if list is empty c#?

  1. Using Enumerable. Any() method ( System. Linq ) ...
  2. Using Enumerable.FirstOrDefault() method ( System.Linq ) The Enumerable.FirstOrDefault() method returns the first element of a sequence…
  3. Using Enumerable. Count() method ( System.

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