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I have a data.table which looks like this:

I have a program that uses tesseract to analyze an image taken as a screenshot from the computer. I also have a text file containing "F1 car Bahrain".

I'm working on a code base that uses quite a bit of conditional compilation via macros passed as arguments to the compiler (i.e. gcc -DMACRO_HERE file.cpp). I would like to have a way to get a list of all the macros defined this way within the code so that I can write out all the used macros to the console and save files when the application is run, that way we know exactly what build was used.

I also need to do the same thing with the git hash but I think I can do that easily with a macro.

Edit 1: Note that this is not the same question as GCC dump preprocessor defines since I want the list available within the program and I only want the macros that are declared by being passed to the compiler with the -D argument

Edit 2: I also need it be cross compiler compatible since we use GCC, XL, CCE, CLANG, NVCC, HIP, and the MPI versions of those. Note that we're building with Make

I am trying to write a custom loss function to a Keras model. This loss function takes in the prediction and suppresses all the predictions except the highest one to zero. Something like this:

Given a json such as:

I recently read a paper entitled "REGULARIZING NEURAL NETWORKS BY PENALIZING CONFIDENT OUTPUT DISTRIBUTIONS https://arxiv.org/abs/1701.06548". The authors discuss regularizing neural networks by penalizing low entropy output distributions through adding a negative entropy term to the negative log-likelihood and creating a custom loss function for model training.

The value β controls the strength of confidence penalty. I have written a custom function for categorical cross-entropy as shown below but the negative entropy term need to be added to the loss function.

this is my first post in stackoverflow and english is not my first language, so I'll apologize in advance for any mistakes both in grammar and programming.

I need to replace values in one column of my data frame based on part of values which are in another data frame. My question is similar to this post here, but in their example they have all the possible errors mapped out. In my case, I only need a part of the string to know if I need to replace a value or not.

I already tried to use "if_else" and "grepl" with dplyr. "Grepl" works as long as I have only one row on the second dataframe, when I insert another example I get an error.

Right now my real DF has around 30k rows and 33 variables, and the second DF with the right values may grow every month, so I'm trying to run away from loops as much as I can.

I made a mock table with random data to simulate my need:

Hi I am creating an Android application that allows the title, content, price, number(1), and image to be stored in the database when I write on the bulletin board. An error occurs while registering the publication to the database. I've been thinking about it for days, but I don't know why.

Below is my error.

I have an application that subscribes to a topic in GCP and when there is some messages over there it downloads them and sends them to a queue on ActiveMQ.

In order to make this process fast, I am using executorService and launching multiple threads for sending messages to activeMQ. Since this the subscription is supposed to be an ongoing task I am putting the code in a while(true) loop, and hence I can't shutdown the executorService in a normal fashion, as I will be creating and shutting down the executor service in every loop.

I am searching for an elegant way to shutdown the executorService when the subscription is empty (no data in the topic) for like 2 or 3 minutes or some inactivity window. and then of course it starts again when there is some new data.

The following is my idea which I don't like, which is just a counter that I am incrementing when the subscription retrieves no data.

I am looking for a more elegant way of doing that.