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How to check which locks are held on a table
...e locked, but this may helpful to you.
You can check which statements are blocked by running this:
select cmd,* from sys.sysprocesses
where blocked > 0
It will also tell you what each block is waiting on. So you can trace that all the way up to see which statement caused the first block that...
How to 'insert if not exists' in MySQL?
...It will certainly stop your script, with a failure. It must be possible in PHP to adress that case ...
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Difference between volatile and synchronized in Java
... as volatile and always accessing the variable in a synchronized(this) block in Java?
4 Answers
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Setting a width and height on an A tag
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You need to make your anchor display: block or display: inline-block; and then it will accept the width and height values.
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What are the allowed tags inside a ?
...hat an <li> may contain flow content, which is the collection of all block and inline elements.
The HTML5 spec for an <li> is the same in that it also allows any flow content.
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Is there a way to programmatically tell if particular block of memory was not freed by FastMM?
I am trying to detect if a block of memory was not freed. Of course, the manager tells me that by dialog box or log file, but what if I would like to store results in a database? For example I would like to have in a database table a names of routines which allocated given blocks.
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using statement with multiple variables [duplicate]
...tle more compact by somehow declaring the 2 variable inside the same using block?
2 Answers
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_block_type_is_valid(phead- nblockuse) - C/C++ - 清泛网 - 专注C/C++及内核技术
_block_type_is_valid(phead- nblockuse)出现这种错误的原因有多个，基本原因有四个,可以参见:SO。错误如下:比较常见的错误时，把多个对象的数组当做一个对象删除了，例如:void te...出现这种错误的原因有多个，基本原因有四个, 可以参...
使用位置传感器 · App Inventor 2 中文网
...rcode which can be scanned to install the app on your phone.
The source (blocks) for you to use/customize. Download the file to your computer then upload it into App Inventor.
A snapshot of the app in the Component Designer.
Annotated blocks to help you undertstand the app. The annotations are...
Nested classes' scope?
....inner_var = outer_var
The problem you encountered is due to this:
A block is a piece of Python program text that is executed as a unit.
The following are blocks: a module, a function body, and a class
definition.
(...)
A scope defines the visibility of a name within
a block.
(...)...