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COALESCE Function in TSQL
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declare @store table (store_id varchar(300))
insert into @store
values ('aa'),('bb'),('cc')
declare @str varchar (4000)
select @str = concat(@str+',',store_id) from @store
select @str
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How do I write good/correct package __init__.py files
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__all__ is very good - it helps guide import statements without automatically importing modules
http://docs.python.org/tutorial/modules.html#importing-from-a-package
using __all__ and import * is redundant, only __all__ is nee...
What does auto do in margin:0 auto?
...e replacement for the "center" tag. It comes in handy when you need broken tables and non-working centering for blocks and text.
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How to trigger HTML button when you press Enter in textbox?
...void using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.
What should I use then? (The good practice)
// Make sure this code gets executed after the DOM is loaded...
Best Practice to Organize Javascript Library & CSS Folder Structure [closed]
...n easily use different themes and you allow your application to be more portable. appcropolis-project resources css blue-theme background.png images background.png blue-theme.css my-index.css js my-index.js my-contact-info.js images products computer.jpg cellphone.png printer.jpg my-c...
What are the most interesting equivalences arising from the Curry-Howard Isomorphism?
... have a few things (assisted by the Wikipedia article, which has some neat tables and such itself):
I think that sum types/union types (e.g. data Either a b = Left a | Right b) are equivalent to inclusive disjunction. And, though I'm not very well acquainted with Curry-Howard, I think this demons...
Convert data.frame columns from factors to characters
...sAsFactors:
The default setting for arguments of data.frame and read.table.
may be something you want to set to FALSE in your startup files (e.g. ~/.Rprofile). Please see help(options).
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jQuery to serialize only elements within a div
...I imagine the above could get slow if the div had lots of elements, like a table with several rows/columns.
– David Murdoch
Apr 14 '11 at 19:23
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Rails create or update magic?
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Won't assign_or_new return the first row in the table if it exists and then that row will get updated? It seems to be doing that for me.
– steve klein
Apr 27 '15 at 17:13
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How to get the browser viewport dimensions?
...eight on mobile devices, really tripleodeon.com/wp-content/uploads/2011/12/table.html
– Dan
Jul 31 '13 at 10:57
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