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AppInventor2 文本输入框（TextBox）已支持文本变更事件，非常便于实时处理...
自 v2.70开始，文本输入框加入了文本变更事件：
效果如下：
同理，密码输入框组件也是一样的。
How to output MySQL query results in CSV format?
Is there an easy way to run a MySQL query from the Linux command line and output the results in CSV format?
38 Answers
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Are PDO prepared statements sufficient to prevent SQL injection?
...CII \ i.e. 0x5c. As it turns out, there are 5 such encodings supported in MySQL 5.6 by default: big5, cp932, gb2312, gbk and sjis. We'll select gbk here.
Now, it's very important to note the use of SET NAMES here. This sets the character set ON THE SERVER. There is another way of doing it, but we...
“21天教你学会C++” - 创意 - 清泛网 - 专注C/C++及内核技术
...法（如果你已经会一门类似的语言），但你无法学到多少如何运用这些语法。简而言之，如果你是，比如说一个Basic程序员，你可以学会用C++语法写出Basic风格的程序，但你学不到C++真正的优点（和缺点）。那关键在哪里？Alan Per...
PHP PDO: charset, set names?
I had this previously in my normal mysql_* connection:
9 Answers
9
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LAST_INSERT_ID() MySQL
I have a MySQL question that I think must be quite easy. I need to return the LAST INSERTED ID from table1 when I run the following MySql query:
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Remote connect to clearDB heroku database
How can i perform a remote connect to ClearDB MySQL database on heroku using for example MySQL Query Browser. Where to get url, port, login and password?
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How to escape single quotes in MySQL
How do I insert a value in MySQL that consist of single or double quotes. i.e
16 Answers
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内存管理内幕：动态分配的选择、折衷和实现 - C/C++ - 清泛网 - 专注C/C++及内核技术
...点是 C 语言，但同样也适用于其他语言。文中将为您提供如何管理内存的细节，然后将进一步展示如何手工管理内存，如何使用引用计数或者内存池来半手工地管理内存， 以及如何使用垃圾收集自动管理内存。为什么必须管理...
Differences between INDEX, PRIMARY, UNIQUE, FULLTEXT in MySQL?
... the differences between PRIMARY, UNIQUE, INDEX and FULLTEXT when creating MySQL tables?
3 Answers
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