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Using Linq to group a list of objects into a new grouped list of list of objects
...ows you to iterate over the members of the group. As Lee mentions, you can convert each group to a list if you really want to, but if you're just going to iterate over them as per the code above, there's no real benefit in doing so.
...
Recommended date format for REST GET API
... timezone setting of user's device/browser.
Cons:
Extra processing for converting to UTC for storing in UTC format in the database.
Readability of input/output.
Readability of GET URLs.
Notes:
Timezones are a presentation-layer problem! Most of your code shouldn't be dealing with timezones o...
Simple state machine example in C#?
...mand, End Command, Pause Command, Resume Command, Exit Command).
You can convert this to C# in a handful of ways, such as performing a switch statement on the current state and command, or looking up transitions in a transition table. For this simple state machine, I prefer a transition table, whi...
Why would adding a method add an ambiguous call, if it wouldn't be involved in the ambiguity
... object)
Candidate zero is obviously inapplicable because string is not convertible to string[]. That leaves three.
Of the three, we must determine a unique best method. We do so by making pairwise comparisons of the three remaining candidates. There are three such pairs. All of them have ident...
Output array to CSV in Ruby
...{ |csv, row| csv << CSV.generate_line(row) }.join(""))}
NOTE:
To convert an active record database to csv would be something like this I think
CSV.open(fn, 'w') do |csv|
csv << Model.column_names
Model.where(query).each do |m|
csv << m.attributes.values
end
end
H...
what's data-reactid attribute in html?
...loqi70ccu80.0' />
</span>
</div>
It needs to be able to convert that back into the data structure above. The way it does that is with the unique data-reactid attributes. This is called inflating the component tree.
You might also notice that if React renders at the client-side, i...
Javascript reduce on array of objects
...lue: Y): X { }
That means that the body of the reducer needs to be about converting currentValue and the current value of the accumulator to the value of the new accumulator.
This works in a straightforward way, when adding, because the accumulator and the element values both happen to be the sam...
What is the Invariant Culture?
...ture, then parsing will fail. However you can use the invariant culture to convert a number to a string and later parse it back from any computer with any culture set.
// Use some non-invariant culture.
CultureInfo nonInvariantCulture = new CultureInfo("en-US");
Thread.CurrentThread.CurrentCulture ...
What are the differences between Rust's `String` and `str`?
...an be seen as a fixed-length String that cannot be resized (you can always convert it into a String if you want to resize it).
A very similar relationship exists between [T] and Vec<T> except there is no UTF-8 constraint and it can hold any type whose size is not dynamic.
The use of str on t...
Using an ORM or plain SQL? [closed]
...dog-work of copying database columns to object fields. They usually handle converting the language's date and time types to the appropriate database type. They generally handle one-to-many relationships pretty elegantly as well by instantiating nested objects. I've found if you design your database ...