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When should I use a composite index?
...he tables in a query (Exemptions are there. eg, Merging of indexes). Which ideally means that a table in a query, must use a single index for all where-clause, table join, group-by and order-by. So a separate index on each column may not work always but a composite index can do the magic.
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View/edit ID3 data for MP3 files
What's a quick and easy way to view and edit ID3 tags (artist, album, etc.) using C#?
6 Answers
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Segmentation fault on large array sizes
... size of your local variables subtracted from the stack pointer. When you call malloc or calloc or any of the memory fuctions the fuctions go and find blocks of memory large enough to sataisfy your reqest.
– rerun
Dec 4 '09 at 16:12
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How do I get Gridview to render THEAD?
...ds to go on Page_Load or GridView_PreRender. I put it in a method that was called after Page_Load and got a NullReferenceException.
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PadLeft function in T-SQL
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I believe this may be what your looking for:
SELECT padded_id = REPLACE(STR(id, 4), SPACE(1), '0')
FROM tableA
or
SELECT REPLACE(STR(id, 4), SPACE(1), '0') AS [padded_id]
FROM tableA
I haven't tested the syntax on the 2nd example. I'm not sure if that works 100% - it may requ...
show all tags in git log
... commit would not be decorated correctly because parse_object had not been called on the second tag and therefore its tagged field had not been filled in, resulting in none of the tags being associated with the relevant commit.
Call parse_object to fill in this field if it is absent so that the...
How to select the last record of a table in SQL?
...e can do is something like
Sql Server
SELECT TOP 1 * FROM Table ORDER BY ID DESC
MySql
SELECT * FROM Table ORDER BY ID DESC LIMIT 1
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Using smart pointers for class members
...Settings object alone? Will the Device object have to be destroyed automatically when the Settings object gets destroyed, or should it outlive that object?
In the first case, std::unique_ptr is what you need, since it makes Settings the only (unique) owner of the pointed object, and the only objec...
Cross-reference (named anchor) in markdown
...e but SO's renderer strips out the anchor.)
Note on self-closing tags and id= versus name=
An earlier version of this post suggested using <a id='tith' />, using the self-closing syntax for XHTML, and using the id attribute instead of name.
XHTML allows for any tag to be 'empty' and 'self-c...
Paging in a Rest Collection
...oing is really simple. My solution only makes a sense for what REST people call a collection.
Client MUST include a "Range" header to indicate which part of the collection he needs, or otherwise be ready to handle a 413 REQUESTED ENTITY TOO LARGE error when the requested collection is too large to ...