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What exactly is Arel in Rails 3.0?
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What exactly is Arel in Rails 3.0?
It's an object model for an algebra of relational query operators.
I understand that it is a replacement for ActiveRecord
No, it isn't. It's a replacement for hand-crafting SQL queries in strings. It is a common query l...
Select element based on multiple classes
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edited May 23 '17 at 12:02
Community♦
111 silver badge
answered Mar 31 '10 at 16:52
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PostgreSQL array_agg order
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If you are on a PostgreSQL version < 9.0 then:
From: http://www.postgresql.org/docs/8.4/static/functions-aggregate.html
In the current implementation, the order of the input is in principle unspecified. Supplying the input values from a sorted subquery will u...
What does PorterDuff.Mode mean in android graphics.What does it do?
...or
Da Destination alpha
Dc Destination color
Where alpha is a value [0..1], and color is substituted once per channel (so use the formula once for each of red, green and blue)
The resulting values are specified as a pair in square braces as follows.
[<alpha-value>,<color-value>]
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LINQ to Entities does not recognize the method
...ting it.
– Zorgarath
Oct 27 '17 at 20:10
4
EDIT: nevermind, it would be : context.Where(IsSatisfi...
How to abandon a hg merge?
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edited Apr 3 '10 at 4:23
answered Apr 3 '10 at 4:14
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Android, How can I Convert String to Date?
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From String to Date
String dtStart = "2010-10-15T09:27:37Z";
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'");
try {
Date date = format.parse(dtStart);
System.out.println(date);
} catch (ParseException e) {
e.printSt...
Differences between Html.TextboxFor and Html.EditorFor in MVC and Razor
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Darin DimitrovDarin Dimitrov
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C++使用OLE/COM高速读写EXCEL的源码 - C/C++ - 清泛网 - 专注C/C++及内核技术
...erhill/article/details/18716559
http://www.cnblogs.com/xianyunhe/archive/2011/09/25/2190485.html
http://blog.sina.com.cn/s/blog_6e51df7f01015cci.html
感谢原作者的无私奉献。
通过VC实现对Excel表格的操作的方法有多种，如：通过ODBC数据库实现，通过解析Excel...
ASP.NET MVC3: What is the packages.config for?
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edited Jun 10 '11 at 9:24
answered Jun 10 '11 at 9:17
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