Series of Knowledge points summaryThese HTML, CSS knowledge points, interviews and peacetime development all need No1-no4 (knowledge points: HTML, CSS, box model, content layout)These HTML, CSS knowledge points, interview and normal development need No5-no7 (knowledge points: Text settings, settings background, data list)These HTML, CSS knowledge points, interviews and peacetime development all need No8-no9
originally had an input tag that used the Datebox component, the user chose the time through the Datebox component, and then the user added a new input tag that uses the Datebox component (when the program re-renders the page). Strange thing happened: the original input tag has already chosen time, the display is also normal, but can not get the value!Based on the idea of a side dish, the reason is that on $.parser.parse (), because it renders the en
What is the difference between normal, unique, and full text indexes of mysql?
What are the differences between normal, unique, and full text indexes of mysql?
PRIMARY key. Is unique and cannot be empty.
INDEX, which is common.
Normal: indicates a
* from ' user ' WHERE username like '%ptd_ '; The previous use of% is also a full table scan, which is not used to the index.In summary, MySQL uses a like query only when you use the following% to use the index. General analysis PRIMARY, INDEX, UNIQUE these 3 kinds are a kind ofPRIMARY primary key. is unique and cannot be empty.Index, normalUnique index. Duplicates are not allowed.Fulltext is a full-text index that is used to retrieve textual informa
ASP. NET GridView Text content cannot wrap (line wrap/normal wrap) font: [Increase decrease] type: Reprint with GridView to display the curriculum, each cell contains the course name, class location, teacher name, and then I want them to display the branch, Interested friends can understand, may be helpful to youWhen I was working on a project recently, I encountered a problem: I use the GridView to display
The steps to set TextView text selection and normal color by selector are as follows:1. Create a folder under Res Color,color folder The code in the tv_text_color_selector.xml,tv_text_color_selector.xml below is as follows:XML version= "1.0" encoding= "Utf-8"?>selectorxmlns:android= "Http://schemas.android.com/apk/res/android"> Itemandroid:state_selected= "true"Android:color= "#5d709a">Item> Itemand
second category: Normal line wrapping .
The key to normal line break is the choice of line breaks, some people say with the escape character "\ r \ n", others say "
1, display string: "When the string" + "\ r \ n" + "a long time \ r \ n will automatically wrap line.
Show the effect as shown below (and no plus):
2, display string: "When the string is relatively long time" + "
The display effect chart
Page text display is normal, the dialog box garbled! Harry
This question does not know to ask in this right not suitable!
Just learned PHP, before being page, connection database, database coding head big, problem solved!
But today we find another problem:
Page text display is normal, why the dialog box in the popup
Always avoid coding problems this pit, when creating a text file, uses the Utf-8 encoding.
But put on Linux, vim Open or garbled.
Cat looks at the content is normal.
So my code should be correct, but Vim does not use Utf-8 to open the text.
Add in. vimrc
Set fileencodings=utf-8,ucs-bom,gb18030,gbk,gb2312,cp936 set
termencoding=utf-8
set Encoding=utf-8
How t
Normal SQL Index
Full-text indexing
Storage is controlled by the database in which they are defined.
stored in the file system, but managed through the database.
Each table allows several common indexes.
Only one Full-text index is allowed per table.
They are automatic
Label:MySQL various index differences:Normal index: The most basic index, without any restrictionsUnique index: Similar to "normal index", the difference is that the value of the indexed column must be unique, but a null value is allowed.Primary KEY index: It is a special unique index and is not allowed to have null values.Full-Text indexing: Available only for MyISAM tables, generating full-
Copy Code code as follows:
'//convert Chinese to Unicode
function urlencoding (Vstrin)
Dim i
Dim strreturn,thischr,innercode,hight8,low8
Strreturn = ""
For i = 1 to Len (Vstrin)
THISCHR = Mid (vstrin,i,1)
If Abs (ASC (THISCHR)) Strreturn = Strreturn THISCHR
Else
Innercode = ASC (THISCHR)
If Innercode Innercode = Innercode + h10000
End If
Hight8 = (Innercode and hff00) \ hff
Low8 = Innercode and hff
Strreturn = strreturn "%" Hex (HIGHT8) "%" Hex (LOW8)
End If
Next
practical problem: under Linux system, using cat to view text files containing Chinese is normal, but using vim to open it is garbled
Workaround: When you open a text file with Vim, enter it in command mode:
: Set Encoding=utf8
can be solved. However, you need to enter this command every time you use VIM to open a text
Win8 system after the mouse cursor flashing can not be the normal way to enter the text of the solution
Failure Reason analysis:
There should be a problem with the mouse hardware.
Workaround:
1, replace the other mouse, if the return to normal instructions is the problem of the mouse.
2, the same mouse access to different computers, if you still encounter th
Copy Code code as follows:
'//convert Chinese to Unicode
function urlencoding (Vstrin)
Dim i
Dim strreturn,thischr,innercode,hight8,low8
Strreturn = ""
For i = 1 to Len (Vstrin)
THISCHR = Mid (vstrin,i,1)
If Abs (ASC (THISCHR)) Strreturn = Strreturn THISCHR
Else
Innercode = ASC (THISCHR)
If Innercode Innercode = Innercode + h10000
End If
Hight8 = (Innercode and hff00) \ hff
Low8 = Innercode and hff
Strreturn = strreturn "%" Hex (HIGHT8) "%" Hex (LOW8)
End If
Next
index. If the query operation only needs an index on the ColumnA data column, you can use the composite Index, index (ColumnA, COLUMNB). However, this usage applies only to combinations of data columns that are arranged in the composite index. For example, index (a, B, c) can be used as an index to a or (a, b), but not as an index to B, C, or (b, c). 6 Full-text indexing A normal index on a
Tags: add win primary key index field name sign a URI properly plain1. 1 Primary key index added when a table is set as the primary key, then the column is the key indexCreate Tableaaa (IDintUnsignedPrimary Keyauto_increment, namevarchar( +) not NULLdefaul "); This is the ID column is automatically the primary key index. If you create a table without specifying a primary key index, you can also add, after creating the table, the directive:Alter TableTable nameAdd Primary Key(column name); For ex
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