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Using an RDBMS as event sourcing storage
If I were using an RDBMS (e.g. SQL Server) to store event sourcing data, what might the schema look like?
6 Answers
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JavaScript string newline character?
... the universal newline character sequence in Javascript for all platforms? If not, how do I determine the character for the current environment?
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Selectors in Objective-C?
... class of type 'SEL' and then run methods such as respondToSelector to see if the receiver implements that method. Can someone offer up a better explanation?
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Remove empty array elements
...all this for you:
print_r(array_filter($linksArray));
Keep in mind that if no callback is supplied, all entries of array equal to FALSE (see converting to boolean) will be removed. So if you need to preserve elements that are i.e. exact string '0', you will need a custom callback:
// PHP 7.4 and...
How can I get System variable value in Java?
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To clarify, system variables are the same as environment variables. User environment variables are set per user and are different whenever a different user logs in. System wide environment variables are the same no matter what user ...
Python SQL query string formatting
...String Literal Concatenation (http://docs.python.org/), which could be qualified a somewhere between Option 2 and Option 4
Code Sample:
sql = ("SELECT field1, field2, field3, field4 "
"FROM table "
"WHERE condition1=1 "
"AND condition2=2;")
Works as well with f-strings:
fie...
Where does git config --global get written to?
...it for Windows, it may not be clear what location this corresponds to. But if you look at etc/profile (in C:\Program Files\Git), you'll see:
HOME="$HOMEDRIVE$HOMEPATH"
Meaning:
C:\Users\MyLogin
(on Windows 7)
That means the file is in C:\Users\MyLogin\.gitconfig for Git in Windows 7.
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How to run a C# console application with the console hidden
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If you are using the ProcessStartInfo class you can set the window style to hidden - in the case of console (not GUI) applications, you have to set CreateNoWindow to true:
System.Diagnostics.ProcessStartInfo start =
ne...
Best way to add “current” class to nav in Rails 3
...on?(*action)
action.include?(params[:action])
end
Then you can use if controller?("homepage") && action?("index", "show") in your views or other helper methods…
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Finding ALL duplicate rows, including “elements with smaller subscripts”
...or or data frame is a duplicate of an element with a smaller subscript. So if rows 3, 4, and 5 of a 5-row data frame are the same, duplicated will give me the vector
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