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Practical uses for AtomicInteger
...n see, it basically works almost the same way as incrementAndGet(), but performs arbitrary calculation (calculateNext()) instead of increment (and processes the result before return).
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What are the best practices for using a GUID as a primary key, specifically regarding performance?
...ry Key in almost all tables and I have read that there are issues about performance when using GUID as Primary Key. Honestly, I haven't seen any problem, but I'm about to start a new application and I still want to use the GUIDs as the Primary Keys, but I was thinking of using a Composite Primary Ke...
How do I escape a single quote?
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You could use HTML entities:
' for '
" for "
...
For more, you can take a look at Character entity references in HTML.
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How to write UPDATE SQL with Table alias in SQL Server 2008?
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The syntax for using an alias in an update statement on SQL Server is as follows:
UPDATE Q
SET Q.TITLE = 'TEST'
FROM HOLD_TABLE Q
WHERE Q.ID = 101;
The alias should not be necessary here though.
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Python: changing value in a tuple
...es where the values rarely change but on few occasions they might want to. For a small but non-zero length sequence, the memory consumption of tuple (60-bytes for one-element) vs list (104 bytes) and make a difference. Another use case is for namedtuples since namedlist doesn't natively exist.
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Check if a row exists, otherwise insert
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I assume a single row for each flight? If so:
IF EXISTS (SELECT * FROM Bookings WHERE FLightID = @Id)
BEGIN
--UPDATE HERE
END
ELSE
BEGIN
-- INSERT HERE
END
I assume what I said, as your way of doing things can overbook a flight, as it wi...
Android - border for button
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thanks.+1 for this.After saving it into drawable folder as a xml file.How can we use it ?
– Android Killer
Oct 7 '11 at 18:26
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Android soft keyboard covers EditText field
... You might want to play with the windowSoftInputMode. See developer docs for more discussion.
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When should I use a table variable vs temporary table in sql server?
... always on disk, and table variables are in memory, that is to say, the performance of table variable is better than temp table because table variable uses less IO operations than temp table.
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Is it possible to Turn page programmatically in UIPageViewController?
...etion:(void (^)(BOOL finished))completion;`
That is the same method used for setting up the first view controller on the page. Similar, you can use it to go to other pages.
Wonder why viewControllers is an array, and not a single view controller?
That's because a page view controller could have ...