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SQL SELECT speed int vs varchar
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Int comparisons are faster than varchar comparisons, for the simple fact that ints take up much less space than varchars.
This holds true both for unindexed and indexed access. The fastest way to go is an indexed int column....
Is it possible to for SQL Output clause to return a column not being inserted?
...ons) taking the data from the original table (Practice), and fill a second intermediate table (PracticeReportOption).
2 Ans...
What exactly is an “open generic type” in .NET? [duplicate]
...lt;T,U> are all open types (T and U are type arguments) whereas List<int> and Dictionary<string,int> are closed types.
There's a related concept: An unbound generic type is a generic type with unspecified type arguments. An unbound type can't be used in expressions other than typeof()...
How can I perform a culture-sensitive “starts-with” operation from the middle of a string?
...exes
for every candidate anyway.
The simplest solution to this is to just internally store strings in case folded form and do binary comparisons with case folded candidates. Then you can
move the cursor correctly with just .Length since the cursor is for internal representation. You also get most o...
C++ catch blocks - catch exception by value or reference? [duplicate]
...e. If a MyException type was thrown your catch block would cause it to be converted to a CustomException instance which would cause the error code to change.
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Split a collection into `n` parts with LINQ?
Is there a nice way to split a collection into n parts with LINQ?
Not necessarily evenly of course.
19 Answers
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Excel RTD(Excel Real-Time Data)实时刷新数据技术 - C/C++ - 清泛网 - 专注C/C++及内核技术
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创建一个项目ExcelRTD，添加Microsoft.Office.Interop.Excel引用。创建一个类MarketData.cs，这个类继承IRtdServer接口，以实现一个RTD Server。新建另一个类DataCollector.cs用于从数据源获取数据。DataCollector有一个方法public DataTabl...
How do I sort a list of dictionaries by a value of the dictionary?
..." % (elem['age'], elem['name']))
It is rather hackish, since it relies on converting the values into a single string representation for comparison, but it works as expected for numbers including negative ones (although you will need to format your string appropriately with zero paddings if you are ...
“:” (colon) in C struct - what does it mean? [duplicate]
...he field in bits. The
type-specifier for the declarator must be unsigned int, signed int, or
int, and the constant-expression must be a nonnegative integer value.
If the value is zero, the declaration has no declarator. Arrays of bit
fields, pointers to bit fields, and functions returning bi...
How to apply bindValue method in LIMIT clause?
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I remember having this problem before. Cast the value to an integer before passing it to the bind function. I think this solves it.
$fetchPictures->bindValue(':skip', (int) trim($_GET['skip']), PDO::PARAM_INT);
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