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How can I generate an ObjectId with mongoose?
...nerate a new new ObjectId
const newId2 = new mongoose.Types.ObjectId();
// Convert string to ObjectId
const newId = new mongoose.Types.ObjectId('56cb91bdc3464f14678934ca');
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Differences between Proxy and Decorator Pattern
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Fully agree Sir. I would convert that in other words what I meant was with Proxy Pattern, the proxy class can hide the detail information of an object from its client. Therefore, when using Proxy Pattern, we usually create an instance of abject insid...
explicit casting from super class to subclass
...[] args)
{
Dog d = getMeAnAnimal();// ERROR: Type mismatch: cannot convert Animal to Dog
Dog d = (Dog)getMeAnAnimal(); // Downcast works fine. No ClassCastException :)
d.eat();
}
private static Animal getMeAnAnimal()
{
Animal animal = new Dog();
return animal;
}
However, ...
How can I make the computer beep in C#?
How do I make the computer's internal speaker beep in C# without external speakers?
6 Answers
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How to hide a View programmatically?
...e, but it still takes up space for layout purposes. Use with setVisibility(int) and android:visibility.
GONE
This view is invisible, and it doesn't take any space for layout purposes. Use with setVisibility(int) and android:visibility.
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What are some compelling use cases for dependent method types?
...pes can give rise to a need for dependent method types. In particular, I maintain that without dependent method types the classic cake pattern is closer to being an anti-pattern.
So what's the problem? Nested types in Scala are dependent on their enclosing instance. Consequently, in the absence of ...
The communication object, System.ServiceModel.Channels.ServiceChannel, cannot be used for communicat
...happen on your server side, and you didn't catch and handle it, and didn't convert it to a SOAP fault, either.
Now since the server side "bombed" out, the WCF runtime has "faulted" the channel - e.g. the communication link between the client and the server is unusable - after all, it looks like you...
efficient circular buffer?
...s answer is very misleading - Python's deque appears to be quite fast, but converting from and to numpy arrays slows it down considerably in the benchmarks you link to.
– xitrium
Dec 11 '19 at 18:09
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wkhtmltopdf: cannot connect to X server
I have been using wkthmltopdf to convert html to pdf documents on-the-fly on my linux web server. The program originally needed X11 or similar X server to run correctly, but through many requests by developers to have this run on servers without GUI, I am pretty sure it runs a virtual X server in...
Java 8 method references: provide a Supplier capable of supplying a parameterized result
...hrow. Otherwise you will get an error message like MyException cannot be converted to java.lang.RuntimeException
Update:- This was an issue with an older version of JDK. I don't see this issue with the latest versions.
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