jacky haha

In iOS development, it is often used to define macros, or to modify some data types with const, and often developers do not know how to use them correctly, resulting in the confusion of macros and const decorations in the project.Can you tell the difference between the following? Do you know when to use it?#define Hscoder @ "Hansha haha"NSString*hscoder = @"Hansha haha";extern NSString*hscoder;extern Const

Tags: blog http SP data log code BS AS-------Sub-query------------Select Bumen,count (*) as the number of people from the haha group by bumen have COUNT (*) >=5Select MAX (nianling) from haha where bumen= ' sales department 'Select *from haha where bumen= ' sales department ' and nianling=56--SummarySelect *from haha w

Recorded in: 2016.1.32016 years to hkust 5 months to write but has not written tomorrow Test English tonight how can not read the book casually write a summary of this 5 months5 months to study for 1200 hours 5*30*8=1200 seniors said that an industry in the study of 1w hours is basically the industry's experts. Haha don't know if it's trueFirst of all, the choice of summer lessons have no choice at that time first contact with Hkust's teaching atmosph

Worksheet class and object of Excel VBA Project 1. worksheet classes and objects when creating a workbook: 1. Create classes and objects: 2. Class and object names: 2. Modify codename: 1. codename is read-only during running, that is, during running, you cannot use code to change this attribute of the worksheet. You can only read this attribute. Otherwise, an error dialog box is displayed as follows. 2. synchronous modification: [1] codename can be modified, but can only be modified in the at

Http://blog.chinaunix.net/u/29134/showart_1069838.html My articles are generally easy to understand and won't be so in-depth that it is hard for everyone to understand. (In fact, I am not at the same level) Load data infile has always been considered a powerful Mysql Data Import tool because it is very fast.But pay attention to a few issues.1. encoding.2. Flexible import and export. Here are two examples.I. EncodingOur example text file:"I love you", "20", "common looks, often playing tricks!

in the/usr/include directory-I/usr/include [4. Reveal the powerful GCC] 1), GCC main. C // generate a. Out 2), GCC-C main. C // generates main. O but does not generate binary execution files 3), GCC-O main. C-C // generate main. O and optimize 4), GCC-C main. c ta. c Gcc-O main. O ta. o // Compile two files into one execution step 5. Important make commands] 1), four files Main. c # Include Int main (void) { Haha (); Sin_value (); Cos_value (); }

") (); When you do this, you print: Harry If the function inside is also passing in the variable Guess whether to print "Harry" or "18". Only "18" will be printed. Iii. self-execution of anonymous functions The above is the recommended wording.Other wording: -function (name) { alert (name); Print: Haha } ("haha") +function (name) { alert (name); Print:

= input (' Please enter name: ') inp2 = Input (' Enter teacher ID: ') # Second: string concatenation # sql = ' INSERT INTO course (CNAME) VALUES ("%s") '%INP # cursor.execute (SQL) # string concatenation can be used, but it is easy to cause SQL injection is not recommended # Third: parameter passing, using%s to make placeholder symbols, passed in parameters, Pymysql internal help us to convert insert_effect_row_sec = Cursor.execute ("Inser T into course (CNAME, teacher_id) VALUE

-consuming operations, provides better control over those operations, and a unified programming interface. Its main function can be attributed to four points. Let's go through the sample code and learn it one step at a.Second, the Ajax operation of the chain-style notationFirst, look back at the traditional writing of jquery's Ajax operations: $.ajax ({ URL: "Test.html", Success:function () {Alert ("Haha, success!") ");}, Error:fu

of the chain-style notationFirst, look back at the traditional writing of jquery's Ajax operations: $.ajax ({ URL: "Test.html", Success:function () {Alert ("Haha, success!") ");}, Error:function () {Alert ("Error! ");} }); (Run code example 1) In the above code, $.AJAX () accepts an object parameter that contains two methods: The Success method specifies the callback function after the operation succeeds, and the err

traditional jQuery ajax operations: Copy codeThe Code is as follows:$. Ajax ({Url: "test.html ",Success: function (){Alert ("Haha, success! ");},Error: function (){Alert ("error! ");}}); In the code above, $. ajax () accepts an object parameter. This object contains two methods: The success method specifies the callback function after the operation is successful, and the error method specifies the callback function after the operation fails. $. After

programming interfaces. Its main functions can be summarized as four points. Next we will learn through the sample code step by step. Ii. Link Writing of ajax operations First, let's review the traditional jQuery ajax operations: The Code is as follows: $. Ajax ({Url: "test.html ",Success: function (){Alert ("Haha, success! ");},Error: function (){Alert ("error! ");}}); In the code above, $. ajax () accepts an object parameter. This object contain

of the chain-style notationFirst, look back at the traditional writing of jquery's Ajax operations:"Test.html"function() {alert ("Haha, success!")　　　　"); }, Error:function() {Alert ("Error!　　　　"); }});In the above code, $.AJAX () accepts an object parameter that contains two methods: The Success method specifies the callback function after the operation succeeds, and the error method specifies the callback function after the operation failed.After th

for jquery. In English, defer means "delay", so the meaning of the deferred object is "delay" to some point in the future to execute.It solves the problem of how to handle time-consuming operations, provides better control over those operations, and a unified programming interface. Its main function can be attributed to four points. Let's go through the sample code and learn it one step at a.　　Second, the Ajax operation of the chain-style notationFirst, look back at the traditional writing of j

ajax operations: The Code is as follows: $. Ajax ({Url: "test.html ",Success: function (){Alert ("Haha, success! "); },Error: function (){Alert ("error! ");} }); In the code above, $. ajax () accepts an object parameter. This object contains two methods: The success method specifies the callback function after the operation is successful, and the error method specifies the callback function after the operation fails. $. After ajax () is completed,