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Why rgb and not cmy? [closed]
Seeing as how the three primary colors are cyan, magenta and yellow (CMY), why do monitors and almost all the GUI components out there use red, green and blue (RGB)? (If I'm not mistaken, printers use the CMYK model.)
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How do you effectively model inheritance in a database?
...s has its own table. The base class has all the base class elements in it, and each class which derives from it has its own table, with a primary key which is also a foreign key to the base class table; the derived table's class contains only the different elements.
So for example:
class Person {
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Does uninstalling a package with “pip” also remove the dependent packages?
...nocchio==0.3
As you can see those packages are dependencies from specloud and they're still there, but not the specloud package itself.
As mentioned below, You can install and use the pip-autoremove utility to remove a package plus unused dependencies.
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How to convert R Markdown to PDF?
I've previously asked about the commands for converting R Markdown to HTML .
8 Answers
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Expanding tuples into arguments
Is there a way to expand a Python tuple into a function - as actual parameters?
4 Answers
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Is a `=default` move constructor equivalent to a member-wise move constructor?
... same declared function type (except for possibly differing ref-qualifiers and except that in the case of a copy constructor or copy assignment operator, the parameter type may be “reference to non-const T”, where T is the name of the member function’s class) as if it had been implicitly decla...
Regex to replace everything except numbers and a decimal point
... is the code that I'm currently using to replace everything except numbers and a decimal point. Issue is, I can't figure out a regex that will identify everything else
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ActiveRecord: size vs count
In Rails, you can find the number of records using both Model.size and Model.count . If you're dealing with more complex queries is there any advantage to using one method over the other? How are they different?
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PostgreSQL: Is it better to use multiple databases with one schema each, or one database with multip
... will work with no trouble. So you definitely want to go with one database and multiple schemas within that database.
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Rails migrations: self.up and self.down versus change
Looks like the new rails version has "change" versus self.up and self.down methods.
3 Answers
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