rum | Simple , decomplected , isomorphic HTML UI library

If you loop through a file a second time, you have to reset the file pointer first with QFile.seek(0) as indicated in the comments.

Getting the line count can be shortened down to

The anaconda you later installed caused the Python interpreter vscode was looking for to be inconsistent.
You can type ctrl + shift + P and type "select Interpreter" and then choose the appropriate interpreter.

You can filter the total drinks by those in which every ingredient is part of the havedIngredients.

I had the same issue, Upgrading both Datadog Rum and logging to 3.6.13 fixed this for me:

If you want to keep a list of all the names, do something like that:

Wrap your figure elements inside of a div and set that to display as flex. See below:

The problem caused by the mutable default parameter in your _deck.py module.

When you create a new Deck(), its self.card attribute is the same for all instances (because of card=[] in the init definition).

If you change it to this, it should work properly:

kindly update the custom-webpack with ^12.1.3

The JVMS §5.1 says

The Java Virtual Machine maintains a run-time constant pool for each class and interface (§2.5.5).

The term “for each” means that there is not one run-time constant pool, but each class or interface has its own dedicated pool. The subsequent sentences make even clear that this data structure corresponds to the constant pool of a class file.

The constant_pool table in the binary representation of a class or interface (§4.4) is used to construct the run-time constant pool upon class or interface creation (§5.3).

It should be clear that this per-class structure is not the same as the single global data structure used to canonicalize string instances throughout the entire runtime.

But since all uses of string constants in a class file are expressed as indices into the class file’s constant pool which is then used to construct the class’s run-time constant pool, there is a relationship between these uses and the global data structure. As stated within §5.1

The static constants in the run-time constant pool are also derived from entries in the constant_pool table in accordance with the structure of each entry:

• A string constant is a reference to an instance of class String, and is derived from a CONSTANT_String_info structure (§4.4.3). To derive a string constant, the Java Virtual Machine examines the sequence of code points given by the CONSTANT_String_info structure:
  • If the method String.intern has previously been invoked on an instance of class String containing a sequence of Unicode code points identical to that given by the CONSTANT_String_info structure, then the string constant is a reference to that same instance of class String.
  • Otherwise, a new instance of class String is created containing the sequence of Unicode code points given by the CONSTANT_String_info structure. The string constant is a reference to the new instance. Finally, the method String.intern is invoked on the new instance.

So formally, the String instances corresponding to the string constants used in a class are part of that class’s runtime constant pool but initialized in terms of String.intern to ensure that each class has canonicalized string instances in its pool.

But this relationship has only one direction. When application code invokes String.intern() explicitly, it won’t access a class’s run-time constant pool. It wouldn’t even be clear, which run-time constant pool we shall expect to be accessed.

So intern() has nothing do to with the run-time constant pool, at least not more than it has to do with every other caller.

A source of confusion is the fact that the data structure used by the JVM to implement intern() has no name in the JVMS or JLS at all. So, without a formal name, different names appear in different media. E.g., the API documentation of intern() says

A pool of strings, initially empty, is maintained privately by the class String.

It’s typically some kind of hash table, but the term “pool” matches its purpose and since it exists at runtime, it’s not surprising that people come up with terms easy to confuse with the run-time constant pools of JVMS §5.1.

So before starting a heated discussion with another developer, it’s important to clarify, whether everyone is talking about the same pool.

As an addendum, I said above that the String is formally part of the run-time constant pool, as this hits implementation specific aspects.

In principle, a JVM could initialize all string entries of a class’s run-time constant pool with String instances when creating the pool. But as this answer demonstrates, this is not the case for the widely used HotSpot JVM which looks up or creates a String instance on the first use rather than class initialization time.

This implies that the run-time constant pool contains the raw character data in some form instead of a reference to a String instance. Once the String is constructed, it is referenced and reused by the code, but whether the run-time constant pool is modified to reference the String now or the bytecode instruction (ldc) keeps it, is not observable from the Java application. All we can observe, is that the String instance does not get garbage collected as long as the class exist.