When working with data, you often have values that are null. For example, you may allow entry of a user's birthday, but not require entry. So some of your rows may contain a null date. Or your application may track a customer's last order date, which will be null if you track potential customers that have not yet made a purchase. When you sort a list that contains null values, the null values will be first in the list as shown below:
Read more: Deborah's Developer MindScape
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Read more: Deborah's Developer MindScape
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