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Rails: How can I set default values in ActiveRecord?
...an column...
self.bool_field = true if (self.has_attribute? :bool_value) && self.bool_field.nil?
Also note that the syntax is different prior to Rails 3.2 (see Cliff Darling's comment below)
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How to change Rails 3 server default port in develoment?
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First - do not edit anything in your gem path! It will influence all projects, and you will have a lot problems later...
In your project edit script/rails this way:
#!/usr/bin/env ruby
# This command will automatically be run when you run "rails" with Rails 3 gems installed from the root...
SQL Server Management Studio SSMS tries to “save to file” instead of execute on F5
...
It sounds like you have accidentally changed from the default query option of "Results to Grid" to "Results to File". If that is the case it is easy to fix:
From the Query Menu -> Results To ->
Results To Grid.
OR
Press Ctrl + D
Once you hav...
How can I change Mac OS's default Java VM returned from /usr/libexec/java_home
...'`"
But standard double-clickable application bundles don't use JDKs installed under /Library/Java at all. Old-style .app bundles using Apple's JavaApplicationStub will use Apple Java 6 from /System/Library/Frameworks, and new-style ones built with AppBundler without a bundled JRE will use the "p...
Extract value of attribute node via XPath
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With xqilla it was necessary to call xs:string. I wonder why.
– krlmlr
Jul 22 '13 at 20:00
1
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Set Locale programmatically
...in consideration that the minSkdVersion for this method is API 17.
Full example code:
@SuppressWarnings("deprecation")
private void setLocale(Locale locale){
SharedPrefUtils.saveLocale(locale); // optional - Helper method to save the selected language to SharedPreferences in case you might nee...
Use cases for the 'setdefault' dict method
...e case: Grouping items (in unsorted data, else use itertools.groupby)
# really verbose
new = {}
for (key, value) in data:
if key in new:
new[key].append( value )
else:
new[key] = [value]
# easy with setdefault
new = {}
for (key, value) in data:
group = new.setdefault(k...
c++关闭按钮灰掉 - C++ UI - 清泛IT社区，为创新赋能！
...tem(ID,MF_ENABLED);复制代码
同理，最大化、最小化按钮灰掉&启用代码如下：
//禁用最小化按钮
void CMainFrame::OnMenudismin()
{
        //获得窗口风格
        Style = ::GetWindowLong(m_hWnd,GWL_STYLE);
     ...
How can I generate an ObjectId with mongoose?
...jectId with Mongoose. Is there a way to access the ObjectId constructor from Mongoose?
4 Answers
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How should I edit an Entity Framework connection string?
...del From Database. The wizard then let me include the sensitive info (uid & pwd) in the connection string. Thanks!
– DeveloperDan
Mar 14 '11 at 15:41
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