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Inheritance vs. Aggregation [closed]
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The "reuse almost all functionality of a class" is the one time I do actually prefer inheritance. What I'd really like is a language that has the ability to easily say "delegate to this aggregated object for these specific methods"; that's the best of both worlds.
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Iterate through every file in one directory
...on all files in subdirs:
Dir.glob("**/*.txt") do |my_text_file| # note one extra "*"
puts "working on: #{my_text_file}..."
end
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Titlecasing a string with exceptions
...he number issue is fixed, or I did not hit your edge case. Ex: titlecase('one 4 two') -> 'One 4 Two'. Now titlecase('1one') -> '1one', but '1one'.title() -> '1One'. though this later case is an edge case and I'm not sure '1One' is the correct titling. I'm also not concerned enough to gr...
Why is Node.js single threaded? [closed]
...he single threaded, async nature does make things complicated. But do you honestly think it's more complicated than threading? One race condition can ruin your entire month! Or empty out your thread pool due to some setting somewhere and watch your response time slow to a crawl! Not to mention deadl...
In bash, how does one clear the current input?
...rom the cursor to the end of the line. (It is sometimes useful to use only one of them.)
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Postgres: Distinct but only for one column
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To do a distinct on only one (or n) column(s):
select distinct on (name)
name, col1, col2
from names
This will return any of the rows containing the name. If you want to control which of the rows will be returned you need to order:
select distin...
Difference between Fact table and Dimension table?
... set of tables and consolidate data (possibly from different systems) into one database structure that can be queried in a very efficient way.
On its simplest form, it contains a fact table (Example: StoreSales) and a one or more dimension tables. Each Dimension entry has 0,1 or more fact tables as...
How can I select multiple columns from a subquery (in SQL Server) that should have one record (selec
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Thank you, outer apply is better than join, because one can reference other parameters as well, which is needed for more complex functions calls etc.
– Andreas Reiff
Jan 25 '18 at 10:22
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Should import statements always be at the top of a module?
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One use case is avoiding circular imports (not usually sensible, but sometimes it is suitable). Sometimes class A in module m1 calls a method on class B in module m2 which constructs another instance of class A. If the method...
How to decide when to use Node.js?
...ould create immense load on the server, because each active client eats up one server process. This situation amounts to a tarpit attack. When you use something like Node.js, the server has no need of maintaining separate threads for each open connection.
This means you can create a browser-based...