There is no reason ever to return null from an array or collection-valued method instead of returning an empty array or collection.
// 原始代码 function process(data) { if (data === null) return 'Invalid data'; if (data.length === 0) return 'Empty data'; // ...更多条件判断 return 'Processed'; } // 改进后的代码 function process(data) { let result; if (data === null) { result = 'Invalid data'; } els...
import org.springframework.web.multipart.MultipartFile; import org.springframework.util.StreamUtils; import java.io.*; public class LocalMultipartFile implements MultipartFile { private final String name; private final String originalFilename; private final String contentType; private final byte[] content;...
Let’s start with an empty class: public class Color {} Here, we’re going to create an instance from this class and assign it to some variable: Color color = new Color(); After compiling this simple Java snippet, let’s take a peek at its bytecode via the javap -c command: 0: ...
41. Return an empty array or collection instead of a null value for methods that return an array or collection Some APIs intentionally return a null reference to indicate that instances are unavailable. This practice can lead to denial-of-service vulnerabilities when the client code fails to exp...
* empty instead. * * @param der DER source to read from. * @param offset The offset in der from which to start reading. @@ -359,11 +360,12 @@ private static ParseDerAnyResult parseDerAny(@NonNull byte[] der, int offset) { * bit) of the tag octet. * @param expectTagClass Th...
How to check string array is not null in C# How to check the date range in where clause using case statements in SQL Server. How to check the givem email address exists or not? how to check Var is empty or null in Linq How to check when and who started the Windows service. How ...
Button is Disable when a textbox is empty Button press for 3 seconds ... trigger event Button that will Show AND Hide a text box Button_Click event fires multiple times button.Enabled = false not working Byte array sum Byte Array to a Structure Byte array to excel workbook Byte array to...
Code to improve: final Collection<DiscussionTopics> topics =s.getTopics(); final boolean anyTopics= topics !=null&& !topics.isEmpty(); Change to: import org.apache.commons.collections.CollectionUtils; !CollectionUtils.isEmpty(s.getTopics())...
An empty set returns a NULL. Likewise, MIN(DISTINCT < value expression >) and MIN (ALL < value expression >) exist, but it is defined only for completeness and nobody ever uses it. The MAX() for a set of numeric values is the largest. The MAX() for a set temporal data types is...