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Group by in LINQ
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Absolutely - you basically want:
var results = from p in persons
group p.car by p.PersonId into g
select new { PersonId = g.Key, Cars = g.ToList() };
Or as a non-query expression:
var results = persons.GroupBy(
p => p.PersonId,
p =&...
Python str vs unicode types
Working with Python 2.7, I'm wondering what real advantage there is in using the type unicode instead of str , as both of them seem to be able to hold Unicode strings. Is there any special reason apart from being able to set Unicode codes in unicode strings using the escape char \ ?:
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Collapse sequences of white space into a single character and trim string
Consider the following example:
13 Answers
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How to stretch the background image to fill a div
I want to set a background image to different divs, but my problems are:
10 Answers
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Cleanest way to toggle a boolean variable in Java?
Is there a better way to negate a boolean in Java than a simple if-else?
9 Answers
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Unix's 'ls' sort by name
Can you sort an ls listing by name?
11 Answers
11
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kill -3 to get java thread dump
I am using kill -3 command to see the JVM's thread dump in unix. But where can I find the output of this kill command? I am lost!!
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List vs List
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The difference is that, for example, a
List<HashMap<String,String>>
is a
List<? extends Map<String,String>>
but not a
List<Map<String,String>>
So:
void withWilds( List<? extends Map<String,String>> ...
stdlib and colored output in C
I am making a simple application which requires colored output. How can I make my output colored like emacs and bash do?
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Storing JSON in database vs. having a new column for each key
I am implementing the following model for storing user related data in my table - I have 2 columns - uid (primary key) and a meta column which stores other data about the user in JSON format.
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