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Ralf Roth

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Jan 18, 2024, 3:03:50 PM1/18/24
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Package reflect implements run-time reflection, allowing a program tomanipulate objects with arbitrary types. The typical use is to take a valuewith static type interface and extract its dynamic type information bycalling TypeOf, which returns a Type.

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The .reflect method returns a promise that is always successful when this promise is settled. Its fulfillment value is an object that implements the PromiseInspection interface and reflects the resolution of this promise.

When I'm trying to patch in a slice I have no problem, reflect.ValueOf(&slice).Elem().Index(0).CanSet() returns true. This allows me to patch anything inside the slice element, be it a slice of primitive or of structs.

However when I attempt this with a map reflect.ValueOf(&map).Elem().MapIndex(reflect.ValueOf("key")).CanSet() returns false. This prevents me from attempting to do anythnin with the content of my map.

This is not a limitation of the reflect package. Slice index expressions are addressable (e.g. &s[0] is valid for example), so slice elements obtained via reflection will be settable. Map index expressions are not addressable (e.g. &m["a"] is invalid), so values of keys obtained via reflection will not be settable. See related How to update map values in Go

Note: taking the address of a map index expression (and allowing to change a value using reflection) is not allowed because the internals of a map may change at any time (e.g. if new key-values are added to the map, the implementation may have to re-structure the way it stores the key-value pairs internally), so a possible pointer you would obtain by &m["a"] may not exist (or may point to another value) by the time you end up using it. To avoid such confusions and run-time panics, this is not allowed in the first place.

For 1x2 image, you have 2 pixels in one row. Width is 2. Just 1 iteration is enough for this. In the old scenario, 1st iteration is executed when j=0. But then 2nd iteration is also executed because j=1 is still within the condition (equals to width/2). 2nd iteration is unnecessary. You are just reflecting twice which results in no change in the image.

For 4x4 image, the similar issue. You should finish reflection with 2 iterations when j = 0, and when j = 1. However, when j = 2 (j is still equal and smaller than width/2), 3rd iteration is executed and replaces 3rd pixel with 1st pixel which is wrong. Because you had already replaced them once.

Reflect damage has many unique traits that set it apart from all other types of damage in Last Epoch. Unlike hit damage or damage over time, reflected damage does neither and instead directly reduces health and/or ward without going through the full damage calculation. As a result of this, reflect damage itself cannot be reflected. Reflect damage will also not apply ailments or leech health. However, it can still proc on-kill effects if it kills the attacker.

Here is my LEtools project, my idea is to just spam thorn shield and let the reflect damage and the bees do the rest of the job, Druid allows me to reach a correct amount avec Str and Attunement. If you want to improve this build with me that would be awesome !

This high-visibility suit offers UV protection and exceptional visibility, ideal for professionals in challenging environments. With 3M reflective striping in 50 mm width on the shoulders, legs, and back, as well as 25 mm on the arms, it ensures maximum visibility in low-light conditions.

We sought to define whether there are intrinsic molecular subtypes of high-grade bladder cancer. Consensus clustering performed on gene expression data from a meta-dataset of high-grade, muscle-invasive bladder tumors identified two intrinsic, molecular subsets of high-grade bladder cancer, termed "luminal" and "basal-like," which have characteristics of different stages of urothelial differentiation, reflect the luminal and basal-like molecular subtypes of breast cancer, and have clinically meaningful differences in outcome. A gene set predictor, bladder cancer analysis of subtypes by gene expression (BASE47) was defined by prediction analysis of microarrays (PAM) and accurately classifies the subtypes. Our data demonstrate that there are at least two molecularly and clinically distinct subtypes of high-grade bladder cancer and validate the BASE47 as a subtype predictor. Future studies exploring the predictive value of the BASE47 subtypes for standard of care bladder cancer therapies, as well as novel subtype-specific therapies, will be of interest.

The inNormal vector defines a plane (a plane's normal is the vector that is perpendicular toits surface). the inDirection vector is treated as a directional arrow coming in to the plane.The returned value is a vector of equal magnitude to inDirection but with its direction reflected.


Reflection of a vector off a plane.

These can be combined as much as you like. To make all methods exceptions (thereby rendering this rule useless), use prefer-reflect: [2, "exceptions": ["apply", "call", "defineProperty", "getOwnPropertyDescriptor", "getPrototypeOf", "setPrototypeOf", "isExtensible", "getOwnPropertyNames", "preventExtensions", "delete"] ]

Native Image has partial support for reflection and needs to know ahead-of-time the reflectively accessed program elements.Examining and accessing program elements through java.lang.reflect.* or loading classes with Class.forName(String) at run time requires preparing additional metadata for those program elements.(Note: loading classes with Class.forName(String) are included here since it is closely related to reflection.)

Native Image tries to resolve the target elements through a static analysis that detects calls to the Reflection API.Where the analysis fails, the program elements reflectively accessed at run time must be specified using a manual configuration. See Reachability Metadata and Collect Metadata with the Tracing Agent for more information.

The only exception to the constant arguments rule is that the ClassLoader argument of Class.forName(String, ClassLoader) does not need to be a constant; it is ignored and instead a class loader that can load all the classes on the class path is used.The analysis runs to a fix point which means that a chain of calls like Class.forName(String).getMethod(String, Class[]) will first replace the class constant and then the method will effectively reduce this to java.lang.reflect.Method.

The configuration distinguishes between methods and constructors that can be invoked during execution via Method.invoke(Object, Object...) or Constructor.newInstance(Object...) and those that can not.Including a function in the configuration without invocation capabilities helps the static analysis correctly assess its reachability status and results in smaller binary sizes.The function metadata is then accessible at runtime like it would for any other registered reflection method or constructor, but trying to call the function will result in a runtime error.The configuration fields prefixed by query or queried only include the metadata, while the other ones (e.g., methods) enable runtime invocation.

The native image builder generates reflection metadata for all classes, methods, and fields referenced in that file.The queryAllPublicConstructors, queryAllDeclaredConstructors, queryAllPublicMethods, queryAllDeclaredMethods, allPublicConstructors, allDeclaredConstructors, allPublicMethods, allDeclaredMethods, allPublicFields, allDeclaredFields, allPublicClasses, and allDeclaredClasses attributes can be used to automatically include an entire set of members of a class.

However, allPublicClasses and allDeclaredClasses do not automatically register the inner classes for reflective access.They just make them available via Class.getClasses() and Class.getDeclaredClasses() when called on the declaring class.Code may also write non-static final fields like String.value in this example, but other code might not observe changes of final field values in the same way as for non-final fields because of optimizations. Static final fields may never be written.

With conditional configuration, a class configuration entry is applied only if a provided condition is satisfied.The only currently supported condition is typeReachable, which enables the configuration entry if the specified type is reachable through other code.For example, to support reflective access to sun.misc.Unsafe.theUnsafe only when io.netty.util.internal.PlatformDependent0 is reachable, the configuration should look like:

Conditional configuration is the preferred way to specify reflection configuration: if code doing a reflective access is not reachable, it is unnecessary to include its corresponding reflection entry.The consistent usage of condition results in smaller binaries and better build times as the image builder can selectively include reflectively accessed code.

Reflection can be used without restrictions during the native binary generation, for example, in static initializers.At this point, code can collect information about methods and fields and store them in their own data structures, which are then reflection-free at run time.

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