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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...
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...
Best practice: AsyncTask during orientation change
...
I usually solve this by having my AsyncTasks fire broadcast Intents in the .onPostExecute() callback, so they don't modify the Activity that started them directly. The Activities listen to these broadcasts with dynamic BroadcastReceivers and act accordingly.
This way the AsyncTasks ...
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...
Is there documentation for the Rails column types?
... captured via textarea, use Text. For input using textfields, use string.
Integer:
Whole numbers
Float:
Decimal numbers stored with floating point precision
Precision is fixed, which can be problematic for some calculations; generally no good for math operations due to inaccurate rounding.
De...
When is the init() function run?
...suming you have this:
var WhatIsThe = AnswerToLife()
func AnswerToLife() int {
return 42
}
func init() {
WhatIsThe = 0
}
func main() {
if WhatIsThe == 0 {
fmt.Println("It's all a lie.")
}
}
AnswerToLife() is guaranteed to run before init() is called, and init() is guara...
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 ...