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Development

Convert 12-bit Monochrome Image to 8-bit Grayscale

EDIT: If you downvote this question, at least have the decency to comment as to why and how I can make this question better? I honestly thought this was a well-formed question, with all the relevant information, otherwise I wouldn’t have posted it. I have an image sensor board for embedded development for which I […]

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Development

Maven plugin underlined in red + Error creating bean with name ‘entityManagerFactory’ defined in class path

I was having a perfectly fine project, just until a couple of days ago. I ran the project a few days later and now I have a field underlined with red in Maven and something with the ‘entityManagerFactory’. Down here is the stack trace. Connected to the target VM, address: ‘127.0.0.1:14490’, transport: ‘socket’ . ____ […]

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Development

Create object by merging other three with priority (C# .NET 3.5)

I have three C# (using .NET 3.5 for a legacy sw) objects of the same class (A, B, C) that has all public properties (string, int, short, byte, datetime, double) I need to create a fourth (D) by merging the “three” objects. If A has a property set (not null or empty) I have to […]

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Android API Development

How to send/receive data to USB device connection using Android Hardware USB API?

I have here a Bluefruit LE Feather 32u4 board connected to my Android device that I’m trying to send and receive data to. It’s currently programed to echo back what is sent, so I’m trying to figure out the Android API to write and read from it. Here’s some verbose info on the hardware I’m […]

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Android API Development

How to send/receive data to USB device connection using Android Hardware USB API?

I have here a Bluefruit LE Feather 32u4 board connected to my Android device that I’m trying to send and receive data to. It’s currently programed to echo back what is sent, so I’m trying to figure out the Android API to write and read from it. Here’s some verbose info on the hardware I’m […]

Categories
Development HTTP

How to abort request when using ClientHttpRequestInterceptor in Spring?

If you read the javadoc on ClientHttpRequestInterceptor.intercept method, it says: execute the request using ClientHttpRequestExecution.execute(org.springframework.http.HttpRequest, byte[]), or do not execute the request to block the execution altogether. The second part of this statement is what I’m trying to achieve (block the execution altogether based on certain criteria). However, I’ve not been successful in doing so. […]

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Development

32 bit implicit conversions fail generic overload resolution

I’m experimenting with custom integer types and came across an interesting issue involving generics, implicit conversions, and 32 bit integers. Below is a stripped down example of how to reproduce the problem. If I have two implicit methods that convert int to MyInt and vice versa, I get a compilation error which looks like C# […]

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Development

Illegal refective access

JDK11 + Spring batch CommandLineJobRunner Does anyone know what those warnings mean: WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by org.springframework.cglib.core.ReflectUtils$1 (jar:file:/Users/boru/Downloads/spcljr/build/libs/spcljr-0.0.1-SNAPSHOT.jar!/BOOT-INF/lib/spring-core-5.0.5.RELEASE.jar!/) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain) WARNING: Please consider reporting this to the maintainers of org.springframework.cglib.core.ReflectUtils$1 WARNING: Use –illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal […]

Categories
Development JSON Unity

Convert Unity3D json to Javascript Object json format

My whole workflow: Unity3D(encoding class data in json format) -> WebGL Build -> Javascript html -> Socket.IO Those data type(int, byte[], string) should be readable in socket.io. This is the function I used in Unity3D, in order to convert a class to json string. JsonUtility.ToJson(); Below is the json result from above script, but the […]

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Development

Reading from a data file in c

I’ve been working my way through The Art of Exploitation by Jon Erickson, but I’ve come to a sticking point regarding reading data from a file and his code. There are two programs ./notetaker and ./notesearch, the former is used to create a note with the users id, the latter is used to retrieve notes […]