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Android存储系统基础知识：内部存储，外部存储，App特定目录 ASD(app speci...
...部存储：
内部存储
内部存储只能通过已取得 root 权限的设备进行访问。
应用程序包保存在： /data/data//
私有目录在： /data/user/0//files/
私有目录可与文件组件一起使用来保...
Oracle: If Table Exists
...pts for an Oracle database, and was hoping Oracle had something similar to MySQL's IF EXISTS construct.
15 Answers
...
What's the easiest way to escape HTML in Python?
... on where you'll put the text after running cgi.escape in it. If placed in root HTML context then yes, you're completely safe.
– nosklo
Feb 12 '10 at 3:00
...
back button callback in navigationController in iOS
...utton;
[backButton release];
}
- (void) handleBack:(id)sender
{
// pop to root view controller
[self.navigationController popToRootViewControllerAnimated:YES];
}
Then you can do things like raise an UIAlertView to confirm the action, then pop the view controller, etc.
Or instead of creating a n...
How do I automatically update a timestamp in PostgreSQL
...omatically update the time stamp when a new row is inserted as I can do in MySQL using CURRENT_TIMESTAMP.
4 Answers
...
How do I get the result of a command in a variable in windows?
...iped expression, use ^|:
FOR /F "delims=" %%i IN ('svn info . ^| findstr "Root:"') DO set "URL=%%i"
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What is the difference between XML and XSD?
...
Take an example
<root>
<parent>
<child_one>Y</child_one>
<child_two>12</child_two>
</parent>
</root>
and design an xsd for that:
<xs:schema attributeFormDefault="unqualified" el...
How to access and test an internal (non-exports) function in a node.js module?
...ming you've not globally installed mocha, you could have a Makefile in the root of your app directory that contains the following:
REPORTER = dot
test:
@NODE_ENV=test ./node_modules/.bin/mocha \
--recursive --reporter $(REPORTER) --ui bbd
.PHONY: test
This make file sets up the NODE...
Rails 3 datatypes?
...t by using :limit option with :integer. I have tested it on Rails 3 and MySQL, they are still working, just as said in the blog, they are signed integer.
– RacsO
Dec 18 '13 at 3:23
...
How can I reset a react component including all transitively reachable state?
...mention and state of children is reset, you can add a key attribute to the root-level component returned by render; when it changes, that component will be thrown away and created from scratch.
render: function() {
// ...
return <div key={uniqueId}>
{children}
</div>...