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Why is ArrayDeque better than LinkedList
... essentially involves JVM/OS, and that's expensive. Also, whenever you pop from any end, the internal nodes of LinkedList become eligible for garbage collection and that's more work behind the scene.
Also, since the linked list nodes are allocated here and there, usage of CPU cache won't provide mu...
Adding an identity to an existing column
... )
ON [PRIMARY]
go
SET IDENTITY_INSERT dbo.Tmp_Names ON
go
IF EXISTS ( SELECT *
FROM dbo.Names )
INSERT INTO dbo.Tmp_Names ( Id, Name )
SELECT Id,
Name
FROM dbo.Names TABLOCKX
go
SET IDENTITY_INSERT dbo.Tmp_Names OFF
go
DROP...
MIN/MAX vs ORDER BY and LIMIT
...oks like MIN() is able to simply pluck the smallest value from the index ('Select tables optimized away' and 'NULL' rows) whereas the SORT and LIMIT still needs needs to do an ordered traversal of the index (106,000 rows). The actual performance impact is probably negligible.
It looks like MIN() i...
Print newline in PHP in single quotes
I try to use single quotes as much as possible and I've noticed that I can't use \n in single quotes. I know I can just enter a newline literally by pressing return, but that screws up the indentation of my code.
...
MVC DateTime binding with incorrect date format
...these will be culture aware however. There is a very good reason for this, from a localization perspective. Imagine that I have written a web application showing airline flight information that I publish online. I look up flights on a certain date by clicking on a link for that day (perhaps somethin...
relative path in BAT script
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I have found that %CD% gives the path the script was called from and not the path of the script, however, %~dp0 will give the path of the script itself.
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How random is JavaScript's Math.random?
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90 have 2 digits
900 have 3 digits
1 has 4 digits
and so on.
So if you select some at random, then that vast majority of selected numbers will have the same number of digits, because the vast majority of possible values have the same number of digits.
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Is there a way to get the XPath in Google Chrome?
...asking "how to get an xpath string for an element?", rather than "how do i select by xpath?" wasn't he?
– Max Williams
Jan 3 '12 at 11:05
3
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Objective-C class -> string like: [NSArray className] -> @“NSArray”
I am trying to get a string name of a class from the class object itself.
3 Answers
3
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How to free memory in Java?
... they
currently occupy available for quick
reuse. When control returns from the
method call, the Java Virtual Machine
has made a best effort to reclaim
space from all discarded objects.
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