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Foreign Key to multiple tables
I've got 3 relevant tables in my database.
5 Answers
5
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Best way to store date/time in mongodb
...st.find()
{ "_id" : ObjectId("..."), "date" : ISODate("2014-02-10T10:50:42.389Z") }
{ "_id" : ObjectId("..."), "date" : ISODate("2014-02-10T10:50:57.240Z") }
The native type supports a whole range of useful methods out of the box, which you can use in your map-reduce jobs, for example.
If you nee...
What is the purpose of the -nodes argument in openssl?
...t the private key, you can omit -nodes and your key will be encrypted with 3DES-CBC. To encrypt the key, OpenSSL prompts you for a password and it uses that password to generate an encryption key using the key-derivation function EVP_BytesToKey.
Depending on your version of OpenSSL and compiled op...
Get city name using geolocation
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Alex
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answered Jul 23 '11 at 3:15
MichalMichal
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How to set up a PostgreSQL database in Django
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edited May 3 '17 at 13:00
community wiki
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What is pseudopolynomial time? How does it differ from polynomial time?
...t input.
For example, if the input to a sorting algorithm is an array of 32-bit integers, then the size of the input would be 32n, where n is the number of entries in the array. In a graph with n nodes and m edges, the input might be specified as a list of all the nodes followed by a list of all t...
How do I convert a Ruby class name to a underscore-delimited symbol?
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Rails comes with a method called underscore that will allow you to transform CamelCased strings ...
Extract a regular expression match
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answered Feb 3 '10 at 14:46
hadleyhadley
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How to compare types
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answered Mar 30 '11 at 6:47
JaredParJaredPar
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Placeholder Mixin SCSS/CSS
...-lang.com/docs/yardoc/file.SASS_REFERENCE.html#mixin-content
As of Sass 3.4, this mixin can be written like so to work both nested and unnested:
@mixin optional-at-root($sel) {
@at-root #{if(not &, $sel, selector-append(&, $sel))} {
@content;
}
}
@mixin placeholder {
@include ...