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How do I handle too long index names in a Ruby on Rails ActiveRecord migration?
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Provide the :name option to add_index, e.g.:
add_index :studies,
["user_id", "university_id", "subject_name_id", "subject_type_id"],
:unique => true,
:name => 'my_index'
If using the :index option on references in...
Correct way to use StringBuilder in SQL
...y. (I think you've misquoted it, though; surely there aren't quotes around id2 and table?)
Note that the aim (usually) is to reduce memory churn rather than total memory used, to make life a bit easier on the garbage collector.
Will that take memory equal to using String like below?
No, it'll...
Set “Homepage” in Asp.Net MVC
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@NikolaiDante you should make that comment an answer as I nearly missed it and it's quicker than this answer. :) Thanks
– GazB
May 21 '13 at 12:20
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REST API Best practices: Where to put parameters? [closed]
...nted best practices, I have not found them yet. However, here are a few guidelines I use when determining where to put parameters in an url:
Optional parameters tend to be easier to put in the query string.
If you want to return a 404 error when the parameter value does not correspond to an exist...
Select distinct values from a table field
...ctually that works. However! I couldn't get it to work on all my models. Weidly, it worked on some but not others. For those that have a Meta ordering it doesn't work. So, you have to clear the ordering on the queryset first. models.Shop.objects.order_by().values('city').distinct()
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Clean code to printf size_t in C++ (or: Nearest equivalent of C99's %z in C++)
...r for size_t and ptrdiff_t arguments, Visual C++ for instance use %Iu and %Id respectively, I think that gcc will allow you to use %zu and %zd.
You could create a macro:
#if defined(_MSC_VER) || defined(__MINGW32__) //__MINGW32__ should goes before __GNUC__
#define JL_SIZE_T_SPECIFIER "%Iu"
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Multiple GitHub Accounts & SSH Config
...hub.com
HostName github.com
PreferredAuthentications publickey
IdentityFile ~/.ssh/me_rsa
Host work.github.com
HostName github.com
PreferredAuthentications publickey
IdentityFile ~/.ssh/work_rsa
My work profile didn't take until I did a ssh-add ~/.ssh/work_rsa. After that ...
How to apply a function to two columns of Pandas dataframe
Suppose I have a df which has columns of 'ID', 'col_1', 'col_2' . And I define a function :
12 Answers
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How to add a WiX custom action that happens only on uninstall (via MSI)?
...odifies. According to the table above I had to use
<Custom Action='CA_ID' Before='other_CA_ID'>
(NOT UPGRADINGPRODUCTCODE) AND (REMOVE="ALL")</Custom>
And it worked!
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Node.js + Express: Routes vs controller
...e in general) is it doesn't push a lot of opinions on you; one of the downsides is it doesn't push any opinions on you. Thus, you are free (and required!) to set up any such opinions (patterns) on your own.
In the case of Express, you can definitely use an MVC pattern, and a route handler can certa...