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How to get first record in each group using Linq
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var res = from element in list
group element by element.F1
into groups
select groups.OrderBy(p => p.F2).First();
share
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Hibernate: Automatically creating/updating the db tables based on entity classes
...now if leaving hibernate off the front makes a difference.
The reference suggests it should be hibernate.hbm2ddl.auto
A value of create will create your tables at sessionFactory creation, and leave them intact.
A value of create-drop will create your tables, and then drop them when you close the ...
How to use index in select statement?
...rt: you don't have to specify index in query. It is used (or not) automagically. You can force it, however. More details (when and why do this) in other posts below.
– Rast
Apr 28 '14 at 11:05
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Where are an UIWebView's cookies stored?
I'm building an iPhone app with cookies. Deleting cookies in the Safari settings doesn't delete them. Where are they stored? Is it possible to read them from another UIWebView?
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emacs/elisp: What is the hash (pound, number sign, octothorp) symbol used for?
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There is no difference:
(eq 'my-add #'my-add)
yields t
The # can be used in front of a lambda expression indicating to the byte-compiler that the following expression can be byte compiled, see the docs for Anonymous Functions. But there's nothing to compile in the case of a symbol.
In gener...
How to safely open/close files in python 2.4
I'm currently writing a small script for use on one of our servers using Python. The server only has Python 2.4.4 installed.
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Convert JsonNode into POJO
This may seem a little unusual, but I am looking for an efficient way to transform/map a JsonNode into a POJO .
4 Answer...
Use NUnit Assert.Throws method or ExpectedException attribute?
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The first allows you to test for more than one exception, with multiple calls:
Assert.Throws(()=>MethodThatThrows());
Assert.Throws(()=>Method2ThatThrows());
The second only allows you to test for one exception per test function.
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Is there a “not in” operator in JavaScript for checking object properties?
...ator in JavaScript to check if a property does not exist in an object? I couldn’t find anything about this around Google or Stack Overflow. Here’s a small snippet of code I’m working on where I need this kind of functionality:
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jQuery selector regular expressions
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James Padolsey created a wonderful filter that allows regex to be used for selection.
Say you have the following div:
<div class="asdf">
Padolsey's :regex filter can select it like so:
$("div:regex(class, .*sd.*)")
Also, check the official documentation on se...