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Rails: How can I set default values in ActiveRecord?
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See Paul Russell's comment on this answer for more details
If you're only selecting a subset of columns for a model (ie; using select in a query like Person.select(:firstname, :lastname).all) you will get a MissingAttributeError if your init method accesses a column that hasn't been included in the...
What is in your Mathematica tool bag? [closed]
...pplication of Reap and Sow which mimics/extends the behavior of GatherBy:
SelectEquivalents[x_List,f_:Identity, g_:Identity, h_:(#2&)]:=
Reap[Sow[g[#],{f[#]}]&/@x, _, h][[2]];
This allows me to group lists by any criteria and transform them in the process. The way it works is that a c...
Vim: apply settings on files in directory
...should the braces of the for-snippet be on a newline ?"), or call function from them (I don't limit myself to coding standards, I also set the makefile to use depending on the current directory)
DRY: with modelines, a setting needs to be repeated in every file, if there are too many things to set or...
Unable to create a constant value of type Only primitive types or enumeration types are supported in
...umerable() // database query ends here, the rest is a query in memory
.Select(x =>
new PersonDTO
{
personId = x.personId,
addressId = x.addressId,
favoriteId = x.favoriteId,
personProtocol = ppCombined
.Where(p...
“Remote System Explorer Operation” causing freeze for couple of seconds
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Here are the steps:
Click on the Windows > Preferences menu
Select General > Workspace > Build in the tree
Uncheck Use default build order
Select RemoteSystemsTempFiles
Click Remove Project
Click Apply and Close
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When to use single quotes, double quotes, and backticks in MySQL
...ng query will produce different results (or errors) depending on SQL mode:
SELECT "column" FROM table WHERE foo = "bar"
ANSI_QUOTES disabled
The query will select the string literal "column" where column foo is equal to string "bar"
ANSI_QUOTES enabled
The query will select the column column where ...
How to automatically generate getters and setters in Android Studio
...ar -> Code -> Generate...
and then using shift or control button, select all the variables you need to add getters and setters
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How to find the port for MS SQL Server 2008?
...nfiguration -> Client Protocols -> TCP/IP
double click ( Right click select Properties ) on TCP/IP.
You will find Default Port 1433.
Depending on connection, the port number may vary.
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How to select a radio button by default? [duplicate]
I have some radio buttons and I want one of them to be set as selected by default when the page is loaded. How can I do that?
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django-debug-toolbar not showing up
.... In *nix, you can do that simply with find . -name "*.pyc" -exec rm {} \; from the project root. Finally, run python manage.py shell and execute from django.conf import settings and check the value of settings.INSTALLED_APPs.
– Chris Pratt
May 9 '12 at 14:42
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