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Mastering Development

Spring kafka – Failed to construct kafka consumer

I’m having an issue with getting my Kafka / confluent spring boot with gradle project up and running. I originally had just a producer in this test project and everything was running well. I then added a Kafka consumer and now I get an exception on start up. Would anyone be able to spot the […]

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Mastering Development System & Network

How to use Flow-guided video completion (FGVC)?

How can you use Flow-guided video completion (FGVC) for a personal file? Operation is not specified on the various official sources for those who would like to use the FGVC freely from the Google Colab platform (https://colab.research.google.com/drive/1pb6FjWdwq_q445rG2NP0dubw7LKNUkqc?usp=sharing). I, as a test, I uploaded a video to Google Drive (of the same account from which I […]

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Mastering Development

Hashing Function for a Dynamic Open Addressing Quadratically Probed Hash Table

I’ve been writing from scratch a C implementation for a dynamically sized hash table. I made a crucial error in that my hashing function was based on the capacity of the hash table. Since the capacity changes over times this doesn’t work. What are the recommendations for developing a hashing function for a dynamically allocated […]

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Mastering Development

Why does this constant variable change inside a function

I have written a function which gets a const unsigned char* variable as an argument, then copies it and does some process(triple DES) on it. I have no problem with the rest of the code. But I am struggling to understand why does this function change the unsigned chars which this pointer point to! the […]

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Bitcoin Cryptocurrency Mastering Development

I encountered Signature is found in scriptCode exception when trying to make a BTC transfer

When I transferred a 0.001 BTC from miBEA6o6nZcaLZebR1dsDv4AMHRwJk1mbi to miV1sbmLM9fptRfWD5o8hs5L6ucUeJzmp5, the following error occurred: mandatory-script-verify-flag-failed (Signature is found in scriptCode) (code 16) This is my broadcast data: 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 The test method I performed: https://github.com/lingting/VirtualCurrency/blob/0.3.1/src/test/java/live/lingting/virtual/currency/omni/Transfer.java#L130 Transfer operation, signed code: https://github.com/lingting/VirtualCurrency/blob/0.3.1/src/main/java/live/lingting/virtual/currency/service/impl/BtcOmniServiceImpl.java#L248 The signature is at https://github.com/lingting/VirtualCurrency/blob/0.3.1/src/main/java/live/lingting/virtual/currency/service/impl/BtcOmniServiceImpl.java#L335 signature code: List<TransactionInput> inputs = tx.getInputs(); for (int i = 0; […]

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Mastering Development

Filter multiple value from multi array

My array like this : $myArray = array( array( ‘uid’ => ‘100’, ‘name’ => ‘Michael’, ‘pic_square’ => ‘urs121’ ), array( ‘uid’ => ‘200’, ‘name’ => ‘machavent’, ‘pic_square’ => ‘urs222’ ), array( ‘uid’ => ‘300’, ‘name’ => ‘Ayem’, ‘pic_square’ => ‘urs333’ ), array( ‘uid’ => ‘400’, ‘name’ => ‘Bucin’, ‘pic_square’ => ‘urs444’ ), array( ‘uid’ => […]

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Mastering Development

R shiny: Getting information from Datatable with JS in shiny

I want to read out all column names and in which order they are displayed in my Datatable. I can’t use options like "stateSave" because of different reasons. I don’t have a glue about JS, but I’m sure it can be done with it, so I need you to help me. I tried code snippets […]

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User Help

Why doesn’t “ssh-keygen -R” remove the host from ~/.ssh/known_hosts

It seems that ssh-keygen is unable to identify the host that I’ve requested to remove from the hosts file. $ ssh-keygen -R ‘leviathan.labs.overthewire.org’ Host leviathan.labs.overthewire.org not found in /Users/zachriggle/.ssh/known_hosts But the host is clearly in the known_hosts file: $ grep leviathan.labs.overthewire.org ~/.ssh/known_hosts [leviathan.labs.overthewire.org]:2223 ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDPNAn6LOV1QtSqlnnXz6eECuznq5bNIe6DLFpMNZMEI This is only caught by Paramiko, but it seems that […]

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CMS Drupal Mastering Development

How to display configuration updates when deleting fields programatically

I am working on a module that adds it’s needed fields automatically when you enable it’s function in the UI for specific entity types. It also deletes it’s needed fields when you disable it’s function for an entity type. (I’m not talking about when you enable the module) We are doing this with the following […]

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CMS Mastering Development Wordpress

How to prevent checkout in billing_country dropdown field if option is not selected

The title might seem a simple fix but it is indicating it is a required field – yet checkout is allowed without an option being chosen and the select option just showing. I have the following functions running in the function.php of the child theme – anybody see any conflict? add_filter( ‘woocommerce_form_field_country’, ‘filter_form_field_country’, 10, 4 […]