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Why do we need a pure virtual destructor in C++?
...r.
Nope, plain old virtual is enough.
If you create an object with default implementations for its virtual methods and want to make it abstract without forcing anyone to override any specific method, you can make the destructor pure virtual. I don't see much point in it but it's possible.
Note ...
Easy interview question got harder: given numbers 1..100, find the missing number(s) given exactly k
...me this, perform computations in Zq field, where q is a prime such that n <= q < 2n - it exists by Bertrand's postulate. The proof doesn't need to be changed, since the formulas still hold, and factorization of polynomials is still unique. You also need an algorithm for factorization over fini...
jQuery: checking if the value of a field is null (empty)
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@Guffa beg to differ, an empty <select> can contain possible options for your user whose <option>s will come from some sort of validation.
– Malcolm Salvador
Aug 1 '17 at 3:18
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How do I get a UTC Timestamp in JavaScript?
...etTime() / 1000)
It will factor the current timezone offset into the result. For a string representation, David Ellis' answer works.
To clarify:
new Date(Y, M, D, h, m, s)
That input is treated as local time. If UTC time is passed in, the results will differ. Observe (I'm in GMT +02:00 right n...
Fetch first element which matches criteria
...
This might be what you are looking for:
yourStream
.filter(/* your criteria */)
.findFirst()
.get();
An example:
public static void main(String[] args) {
class Stop {
private final String stationName;
private final int passengerCount;
...
What does ellipsize mean in android?
... android:maxLines="2" (or more). I haven't seen any dots at the start although the text was too long.
– ka3ak
Oct 28 '18 at 8:20
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Rails update_attributes without save?
Is there an alternative to update_attributes that does not save the record?
4 Answers
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How to format a number 0..9 to display with 2 digits (it's NOT a date)
... This will generate an Android Linter Warning "Implicitly using the default locale is a common source of bugs: Use String.format(Locale, ...) instead"
– Christopher Stock
Feb 15 '19 at 10:36
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What's best SQL datatype for storing JSON string?
...R columns come in two flavors: either you define a maximum length that results in 8000 bytes or less (VARCHAR up to 8000 characters, NVARCHAR up to 4000), or if that's not enough, use the (N)VARCHAR(MAX) versions, which store up to 2 GByte of data.
Update: SQL Server 2016 will have native JSON supp...
How to get function parameter names/values dynamically?
...nc) {
var fnStr = func.toString().replace(STRIP_COMMENTS, '');
var result = fnStr.slice(fnStr.indexOf('(')+1, fnStr.indexOf(')')).match(ARGUMENT_NAMES);
if(result === null)
result = [];
return result;
}
Example usage:
getParamNames(getParamNames) // returns ['func']
getParamNames(fun...