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What's the difference between an inverted index and a plain old index?
In software engineering we create indexes all the time (e.g., in databases) but I also hear a lot of people talk about inverted indices. Is there something fundamentally different between the two? They sound like the same thing.
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How does MySQL process ORDER BY and LIMIT in a query?
...not 1):
SELECT * FROM tbl LIMIT 5,10; # Retrieve rows 6-15
To retrieve all rows from a certain offset up to the end of the result set, you can use some large number for the second parameter. This statement retrieves all rows from the 96th row to the last:
SELECT * FROM tbl LIMIT 95,18446744073...
How can foreign key constraints be temporarily disabled using T-SQL?
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If you want to disable all constraints in the database just run this code:
-- disable all constraints
EXEC sp_MSforeachtable "ALTER TABLE ? NOCHECK CONSTRAINT all"
To switch them back on, run: (the print is optional of course and it is just list...
Why would someone use WHERE 1=1 AND in a SQL clause?
...out whether you have one or more than one condition. You can generate them all like:
and <condition>
and concatenate them all together. With the 1=1 at the start, the initial and has something to associate with.
I've never seen this used for any kind of injection protection, as you say it ...
Folder structure for a Node.js project
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Concerning the folders you mentioned:
/libs is usually used for custom classes/functions/modules
/vendor or /support contains 3rd party libraries (added as git
sub-module when using git as source control)
/spec contains specifications for BDD tests.
/tests contains the unit-...
MySQL LIKE IN()?
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I like this answer - quick, simple, got all of the "options" in one line like I wanted (easy to edit). On the small result set I am targeting, no decrease in performance at all.
– Michael Wales
Jul 14 '09 at 19:04
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iPhone app signing: A valid signing identity matching this profile could not be found in your keycha
...utton "Renew". After renewing and downloading updated provisioning profile all seems to work as expected, so problem is definitely solved :)
Update: you may have to contact Apple to get a "Renew"-button, or they removed it -- and the solution is to just download it and add it to the keychain, no ne...
What’s the best RESTful method to return total number of items in an object?
...ly the most RESTful thing to do if fetch limits are going to be imposed at all.
– Donal Fellows
Sep 15 '10 at 9:06
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How to grep and replace
I need to recursively search for a specified string within all files and subdirectories within a directory and replace this string with another string.
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Is recursion a feature in and of itself?
...int of learning a language, recursion isn't a feature. If your professor really docked you marks for using a "feature" he hadn't taught yet, that was wrong.
Reading between the lines, one possibility is that by using recursion, you avoided ever using a feature that was supposed to be a learning ou...