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Vim users, where do you rest your right hand? [closed]
...en make 3rd & 4th fingers left & right
Then, to avoid overwriting base Vim features: Toss whatever used to be on ; to the now-empty h button
As a cute bonus, the "l" key now stands for "left" ;)
noremap l h
noremap ; l
noremap h ;
The previous "runners-up", who both u...
How to select the rows with maximum values in each group with dplyr? [duplicate]
...py the count table into a new object. Then filter for the max of the group based on the first grouping characteristic. For example:
count_table <- df %>%
group_by(A, B) %>%
count() %>%
arrange(A, desc(n))
count_table %>%
group_by...
What is the purpose of Order By 1 in SQL select statement?
...RDER BY 1
...is known as an "Ordinal" - the number stands for the column based on the number of columns defined in the SELECT clause. In the query you provided, it means:
ORDER BY A.PAYMENT_DATE
It's not a recommended practice, because:
It's not obvious/explicit
If the column order changes, ...
Java `final` method: what does it promise?
...You can't override it in your derived class, therefore it will do what the base class author intended.
http://download.oracle.com/javase/tutorial/java/IandI/final.html
Worth noting is the part where it suggests that methods called from constructors should be final.
...
How can I efficiently select a Standard Library container in C++11?
...arch tag.
Ordering
If you need a container of items to always be sorted based on a particular comparison operation, you can use a set. Or a multi_set if you need multiple items to have the same value.
Or you can use a sorted std::vector, but you'll have to keep it sorted.
Stability
When iterat...
Linq to Entities join vs groupjoin
... input sequence, found all the matching items from the "inner" sequence
(based on a key projection on each sequence) and then yielded pairs of
matching elements. GroupJoin is similar, except that instead of
yielding pairs of elements, it yields a single result for each "outer"
item based on ...
Android Webview - Webpage should fit the device screen
I have tried the following to fit the webpage based on the device screen size.
21 Answers
...
Storing time-series data, relational or non?
...n is never a Key (duplicate rows, which are prohibited in a Relational database, must be prevented by other means).
The Id column requires an additional Index, which obviously impedes the speed of INSERT/DELETE, and adds to the disk space used.
You can get rid of it. Please.
Elevation
Now ...
Is a view faster than a simple query?
...t is materialized immediately and persisted in physical storage in the database, saving the overhead of performing this costly operation at execution time.
Second, these indexed views can work even when they are not directly referenced by another query as the optimizer will use them in place of a ...
How to get error information when HttpWebRequest.GetResponse() fails
... wraps HttpWebRequest and Response into simple methods that return objects based on the results. It uses some of the techniques described in these answers and has plenty of code inspired by answers from this and similar threads. It automatically catches any exceptions, seeks to abstract as much bo...