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Update multiple rows in same query using PostgreSQL
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You can also use update ... from syntax and use a mapping table. If you want to update more than one column, it's much more generalizable:
update test as t set
column_a = c.column_a
from (values
('123', 1),
('345', 2)
) as c(column_b, column_a)
wher...
Android: HTTP communication should use “Accept-Encoding: gzip”
...set Accept-Encoding: gzip in my HttpClient? The search for gzip in the Android References doesn't show up anything related to HTTP, as you can see here .
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Suppress command line output
... the invocation to this:
taskkill /im "test.exe" /f >nul 2>&1
and all will be better.
That works because stdout is file descriptor 1, and stderr is file descriptor 2 by convention. (0 is stdin, incidentally.) The 2>&1 copies output file descriptor 2 from the new value of 1, whic...
C++, Free-Store vs Heap
...ce.
Do compilers make a distinction between the two terms? ( Free store and Heap , not new/malloc )
7 Answers
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How to change the value of attribute in appSettings section with Web.config transformation
... Excellent answer. I was trying 3rd party options like Slow Cheetah and getting nowhere - this was simple and perfect.
– Steve
Aug 14 '15 at 20:53
2
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Meaning of “[: too many arguments” error from if [] (square brackets)
...t find any one simple straightforward resource spelling out the meaning of and fix for the following BASH shell error, so I'm posting what I found after researching it.
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Is Enabling Double Escaping Dangerous?
...ath.
Finally, a very simple, if limited workaround is simply to avoid '+' and use '%20' instead. In any case, using the '+' symbol to encode a space is not valid url encoding, but specific to a limited set of protocols and probably widely supported for backwards-compatibility reasons. If only for...
CSS Properties: Display vs. Visibility
...n - you can't see it).
The display property tells the browser how to draw and show an element, if at all - whether it should be displayed as an inline element (i.e. it flows with text and other inline elements) or a block-level element (i.e. it has height and width properties that you can set, it's...
Maintain git repo inside another git repo
...r Git repository. This lets you clone another repository into your project and keep your commits separate.
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When should I use h:outputLink instead of h:commandLink?
When should I use an <h:outputLink> instead of an <h:commandLink> ?
2 Answers
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