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E11000 duplicate key error index in mongodb mongoose
...find the index that you are not using anymore (in OP's case 'email'). Then select Drop Index
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Why is '397' used for ReSharper GetHashCode override?
...g a hash the result will overflow (since GetHashCode() returns an Int32). Selecting a prime is just helpful for distribution, I don't have a math degree so I'm not going to try and explain it, but multiplication by a prime will have a result that's more well distributed than multiplication by any o...
mysql command for showing current configuration variables
...ent global setting for the innodb_log_buffer_size in bytes and megabytes:
SELECT
variable_name,
variable_value AS innodb_log_buffer_size_bytes,
ROUND(variable_value / (1024*1024)) AS innodb_log_buffer_size_mb
FROM information_schema.global_variables
WHERE variable_name LIKE 'innodb_log_buffe...
configure Git to accept a particular self-signed server certificate for a particular https remote
...es -> View Certificates -> Servers, found there the selfsigned host, selected it and using Export button I got exactly the same file, as created using openssl.
Note: I was a bit surprised, there is no name of the authority visibly mentioned. This is fine.
Having the trusted certificate in de...
Practical uses of different data structures [closed]
...ght accent at all. You need to understand not just which data structure to select, but some other points to consider when people think about data structures:
pros and cons of the common data structures
why each data structure exist
how it actually work in the memory
specific questions/exe...
Scope of sessionStorage and localStorage
...se called webappsstore.sqlite in my Firefox profile directory, using query SELECT scope FROM webappsstore2;. The result is the reverse of the domain, followed by the non-reversed protocol, and sufficed with the port, eg: gro.allizom.snodda.secivres.:https:443. As you can see, there's no mention of a...
Set value of hidden field in a form using jQuery's “.val()” doesn't work
...ontribute to any problems you're having, and specifying a more complicated selector just slows things down and doesn't look as neat.
Example at http://jsbin.com/elovo/edit, using your example code at http://jsbin.com/elovo/2/edit
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Calculate distance between 2 GPS coordinates
...
This is very easy to do with geography type in SQL Server 2008.
SELECT geography::Point(lat1, lon1, 4326).STDistance(geography::Point(lat2, lon2, 4326))
-- computes distance in meters using eliptical model, accurate to the mm
4326 is SRID for WGS84 elipsoidal Earth model
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Enable binary mode while restoring a Database from an SQL dump
...ease follows the preceding steps.
Open file in notepad.
Click on Save as
Select Encoding type UTF-8.
Now source your db.
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In git, is there a simple way of introducing an unrelated branch to a repository?
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The currently selected answer is correct, I would just add that coincidentally...
This is actually exactly how github.com lets users create Github Pages for their repos, thru an orphaned branch called gh-pages.
The pretty steps are given ...