Learn more about MyBatis return values and mybatis return valuesLearn more about MyBatis return values
To learn about the returned values, we need to knowresultType,resultMapAnd the return value defined in the interface method.
Let's look at it first.resultTypeAndresultMap
ResultType and resultMap
Everyone should know thatThere are two ways to set the return value for a tag:resultMapAndresultType.
ProcessingresultMapAndresultTypeThe Code is as follows:
private void setStatementResultMap(
gain insight into MyBatis return values
To understand the return value, we need to understand the Resulttype,resultmap and the return value defined in the interface method.
Let's see Resulttype and Resultmap Resulttype and Resultmap .
As you should know, there are two ways to set the return value in the
The code for handling Resultmap and Resulttype is as follows:
private void Setstatementresultmap (String resultmap, class
You can see that the resultmap is treated preferentially here, but Res
) cost in 341 Ms.
Null
found that the return parameter is NULL, the return value has a problem locating
No problem from SQL, but the view type is Totalpaypo,
Returns the actual type required Totalpaycount
Totalpaycount Selecttotalpaycountinfo (@Param ("EntityId") String entity, @Param ("Currdate") Date currdate, @Param (" Twodayago ") Date Twodayago, @Param (" Ishide ") Integer ishide);
this place MyBatis no error, unbelievable.
View MyBatis source only to find that the problem occurs in the
add code to connect these segments). The format of each segment is similar to this:Decrpytor (solution terminal) + encrpyted code (transformed code) + link code (code connecting other segments ). This method is the most troublesome, but the deformation intensity is the highest.It is possible that cainiao like me will be depressed, and they will not be able to live in such trouble ~~~ I am actually here, so all I can think of is to talk about the troubles I just mentioned. Now it's simple (it sh
:05:54.000000000 +0800************1,7 ****!123!3432!adfs!EWR---1,7----!sdf!231!sadf! 2qwreqwExample 4-u represents a standard comparison,---represents the first file, + + + represents the second file, where the @@ 部分 indicates that the first file starts with 1-7 lines, and the second file starts with 1-7 linesDiff test1 test2-u---test12015-09-07 00:05:39.000000000 +0800+++ test22015-09-07 00:05:54.000000000 +0800@@ -1,7 +1,7 @ @-123+sdf-3432+231-adfs+
This package is mainly used for data cleaning and finishing, Coursera course Links: getting and cleaning
You can also load the swirl package, load class getting and cleaning data to follow.
As follows:
Library (Swirl)
install_from_swirl ("Getting and cleaning Data")
swirl ()
This article is mainly refer to the introduction of R: Introduce to Dplyr
1. Model data
> Library (NYCFLIGHTS13)
> Dim (flights)
[1] 336776
> Head (Flights, 3)
source:local Data frame [3 x] year
month day Dep_time d
Python implements the method of PS image abstract painting effect, and python Painting Style
This article describes how to implement the abstract painting Effect of PS images in Python. We will share this with you for your reference. The details are as follows:
Today we will introduce a special effect on generating Abstract Image Based on Image Segmentation and color map random sampling. Simply put, the color is a color map, and the color is gradient, next, we split the image to be processed. He
Const property of an object.Useful for me [0] throw a brick [0] cite report management topThe second special type conversion is dynamic_cast, which is used to safely type-convert down a class's inheritance. That is, you can use dynamic_cast pointer or reference to the base class to convert exponentially to its derived class or its sibling class, and you can know whether the conversion succeeded. The failed transformation returns a null pointer (when the pointer is type-cast) or throws an except
Flotran result file
Rfrq Binary-reduction Compound displacement document
The result file of RMG Binary Y magnetic field analysis
The result file of RST Binary Y structure and coupling field analysis
RSW Text-flotran "pipe Wall" result file
The result file of Rth Binary Y temperature field analysis
Run Text-flotran data files
Seld load vector data file with Binary Y-generating end
SNN Text Y Load Step file (NN is load step number) [Lswrite]
S
Eax,arg
Ret
Endm
This makes it easy to use return TRUE or return false ...
But that's not the final answer. We can also optimize it based on the parameters returned, which is my optimized version.
return MACRO arg:=〈0〉
ifidni〈arg〉,〈0〉
Sub Eax,eax
elseifidni〈arg〉,〈1〉
XOR Eax,eax
inc EAX
ELSE
MOV Eax,arg
ENDIF
Ret
Endm
3 Ctext Sometimes you need to define some strings in ASM that may only be used once, and then you can use the Ctext macro
Ctext MACRO Y:vararg; This is a good macro
Local Sym
CON
, "localhost", 3306, "root", "123456", "blog", undefined, utf8 ).
4) when writing Chinese characters into the database, the list of Chinese characters is converted to binary. For example, if the Chinese character "Wang" is obtained using yaws_api: parse_post, the corresponding value is a list [231,142,139], and the value in the list is exactly the binary of the character "Wang, therefore, you need to use the iolist_to_binary/1 or list_to_binary/1 function to convert it to binary
Finally, assign
= [Afxmlparserresponseserializer serializer];If the binary data is returned, the default binary is used to parse the dataManager.responseserializer = [Afhttpresponseserializer serializer];Use JSON to parse the dataManager.responseserializer = [Afjsonresponseserializer serializer];/* Knowledge point 2 tells AFN to support this type when serializing the data returned by the server[Afjsonresponseserializer serializer].acceptablecontenttypes = [Nsset setwithobject:@ "Text/xml"];2. To load all the r
to the specialwidget variable type
// If PW does point to an object,
// Otherwise, null pointers will be made when the previous one is passed.
Void updateviaref (specialwidget RSW );
Updateviaref (dynamic_cast
// Correct. Pass to updateviaref Function
// Specialwidget PW pointer, if PW
// It does point to an object
// Otherwise, an exception is thrown.
Dynamic_casts is limited in helping you browse the hierarchy of inheritance. It cannot be used fo
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