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MySQL Error 1093 - Can't specify target table for update in FROM clause
... into a from clause ...
If you absolutely need the subquery, there's a workaround, but it's
ugly for several reasons, including performance:
UPDATE tbl SET col = (
SELECT ... FROM (SELECT.... FROM) AS x);
The nested subquery in the FROM clause creates an implicit temporary
table, so it doesn't...
How to identify whether a file is normal file or directory
How do you check whether a file is a normal file or a directory using python?
7 Answers
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Concatenate a vector of strings/character
...apse argument within the paste function:
paste(sdata, collapse = '')
Thanks to http://twitter.com/onelinetips/status/7491806343
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How to swap files between windows in VIM?
When I work with VIM, I always have multiple windows visible. Sometimes I would like to have an easy way, to swap those windows in places. Is there any Plugin, Macro, etc to make this more easy? BTW, I use MiniBufExplorer.
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How to view files in binary from bash?
I would like to view the contents of a file in the current directory, but in binary from the command line. How can I achieve this?
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How do I convert a git repository to mercurial?
...n developing a java application using git as source code repository. I'd like to share the project with other java developers and hg seems to be most used by them.
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Use of class definitions inside a method in Java
...ass.
2 is the easy one: yes, a class file will be generated.
1 and 3 are kind of the same question. You would use a local class where you never need to instantiate one or know about implementation details anywhere but in one method.
A typical use would be to create a throw-away implementation of...
How to permanently disable region-folding in Visual Studio 2008
Anyone know how to turn off code folding in visual studio 2008? Some of my colleagues love it, but I personally always want to see all the code, and never want code folded out of sight. I'd like a setting that means my copy of Visual Studio never folds #regions or function bodies.
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HTML 5 strange img always adds 3px margin at bottom [duplicate]
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This problem is caused by the image behaving like a character of text (and so leaving a space below it where the hanging part of a "y" or "g" would go), and is solved by using the vertical-align CSS property to indicate that no such space is needed. Almost any value of v...
What are all the valid self-closing elements in XHTML (as implemented by the major browsers)?
...ment.
<div/>, <script/>, <br></br> all should work just fine. If they don't, then you have HTML with inappropriately added XHTML DOCTYPE.
DOCTYPE does not change how document is interpreted. Only MIME type does.
W3C decision about ignoring DOCTYPE:
The HTML WG has di...