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Java Reflection Performance
... reflection throughout a million line system only to later discover it was orders of magnitude too slow.
– RichieHH
Aug 15 '10 at 14:51
2
...
Why the switch statement cannot be applied on strings?
...array but it doesn't really fully understand the notion of a string.
In order to generate the code for a switch statement the compiler must understand what it means for two values to be equal. For items like ints and enums, this is a trivial bit comparison. But how should the compiler compare 2...
使用 XML 和 Web 服务 · App Inventor 2 中文网
...r (hello, everybody). The pairs in a decoding are listed in alphabetical order by tag, regardless of their order in the original input sequence. Each pair consists of the tag, together with the decoding of the data delimited by that tag. As this example shows, if the items delimited by the tag ...
INNER JOIN vs LEFT JOIN performance in SQL Server
...clustered index scans with a seek - meaning that this will literally be an order of magnitude faster with a large number of rows.
So the conclusion is more or less what I mentioned several paragraphs above; this is almost certainly an indexing or index coverage problem, possibly combined with one o...
How to require a controller in an angularjs directive
...controller methods created via $scope.methodName = function(){...}, but in order for this to work, you must use this.methodName for the methods you want accessible. I didn't notice that at first.
– coblr
Mar 19 '14 at 0:57
...
When writing a directive in AngularJS, how do I decide if I need no new scope, a new child scope, or
...ral directives (some nested inside others or adding attributes to them) in order to fully write in my own HTML, which is the purpose of a Domain Specific Language.
In the end, it's too weird to have to pass every global or shared value down the chain with multiple attributes on each DOM invocation ...
How can I remove duplicate rows?
...VER (PARTITION BY Col1, Col2, Col3
ORDER BY ( SELECT 0)) RN
FROM #MyTable)
DELETE FROM cte
WHERE RN > 1;
I am using ORDER BY (SELECT 0) above as it is arbitrary which row to preserve in the event of a tie.
To preserve the latest one in RowID...
Can we have multiple in same ?
...ore easily style groups of data, like this:
thead th { width: 100px; border-bottom: solid 1px #ddd; font-weight: bold; }
tbody:nth-child(odd) { background: #f5f5f5; border: solid 1px #ddd; }
tbody:nth-child(even) { background: #e5e5e5; border: solid 1px #ddd; }
<table>
<thead...
Delete duplicate records in SQL Server?
...
You can do this with window functions. It will order the dupes by empId, and delete all but the first one.
delete x from (
select *, rn=row_number() over (partition by EmployeeName order by empId)
from Employee
) x
where rn > 1;
Run it as a select to see what w...
How to sort List of objects by some property
...d idea to implement Comparable<T> if there's a single "natural" sort order... otherwise (if you happen to want to sort in a particular order, but might equally easily want a different one) it's better to implement Comparator<T>. This particular situation could go either way, to be honest...