return null

When a field in the database is set to Null, the mobile phone will return Null by default. if I want the mobile phone to return Null, I have to make a judgment. 1. if I want to leave the returned result blank on the mobile phone, I will not make any

The last article "you wrote Try...catch really necessary" aroused a lot of friends of the discussion. This time I found another problem in code review, that is, someone intentionally or unintentionally wrote the return null such code, for example:

Java basic learning Summary (127) -- the Java method should return null objects or null, javanull Should the Java method return null or null?In most cases, an empty object (empty object) is used in the method to return a value instead of null. The

What is the difference between return and return null in Java?The biggest difference:ReturnThe return value of the method must be void!return null;The return value of the method must not be the original data type (the wrapper class has been removed)

Read an article: 10 Classic Java Development Principles, one principle: never return null.Why, because a lot of code is A.B (...). C (...) so attached to the call. If each layer of calls is checked for empty, the code is too ugly. But do not return

Solution for PHP to return NULL when processing Json string decoding, jsonnull. PHP solves the problem of returning NULL when processing Json string decoding. jsonnull this article describes how PHP can solve the problem of returning NULL when

When we want to return NULL in X + + and assign it to a CLR object, it'll throw out a issue that "Microsoft Dynamics any Type cannot was marshaled to the CLR Object ", this is because null in X + + is anytype. So if we want to return null and assign

In Java code, return value NULL is not available in any case, why not throw nullpointerexception?Java language level: The null value itself does not cause any problems. It's a quiet place to be (local variables, member fields, static fields) there

Learning Android4.0 's Actionbar, a particularly disgusting problem, must be written down.I started the new 2.2 project, later wanted to test Actionbar, see the document said 11 later to use, I directly changed the project into a min:14,target:17.

This article provides a detailed analysis of file_get_contents's solutions that return null or function unavailability, if you use file_get_contents to obtain remote file content and return null or prompt that the function is unavailable, this

Recent research and development of some Android -based appshas encountered some problems. One of the keys is to get the Button object in the onCreate () method in Activity . The code is probably for example the following:Private Button

I got a bug today.Background is a SPRINGMVC + MyBatis project, mapper file wrote a SQL roughly equivalent to select a from TableA where B = "123" LevelAnd then no matter what's in the database, it will return null. The first response is that

Recent research and development of some Android -based appshas encountered some problems, one of which is key to getting The OnCreate () method in the Activity Button Object, the code might look like this:Private Button Mtruebutton;@OverridePublic

Solution for PHP to return NULL when processing Json string decoding, jsonnull This example describes how PHP can process the return value of NULL for Json string decoding. Share it with you for your reference. The specific method is as follows: In

Obtain a data remotely in the json format, but return null when converting json_decode to an array. I don't know why, the json data does exist to obtain a data remotely, in the form of json, but returns null when json_decode is converted to an array.

This example describes a workaround for PHP to handle JSON string decoding to return null. Share for everyone to use for reference. The specific methods are as follows: In general,PHP uses the Json_decode () function for JSON string decoding, the

This situation is often encountered during development. In Assembly A. dll, the type in assembly B. dll needs to be reflected. A running error occurs if you are not careful with it. For example, if Type. GetType ("BNameSpace. ClassName") is used in

Original address: Http://www.tuicool.com/articles/bmuaEbEarly this morning tasted seajs, found a very egg-ache thing, using the official demo of jquery is no problem,Download the official latest version of jquery 2.1.1 found Console.log ($) returned

This article mainly introduces how PHP can handle Json string decoding and return NULL. it uses an example of a filter function to demonstrate how to handle json return errors, and lists the common causes of this error. if you need a friend, refer

The file_get_contents function is used to collect content on the remote server. However, before using the file_get_contents function. in ini, allow_url_fopen must be enabled for problem description... the file_get_contents function is used to