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I’m currently working on PSBT and I try to understand all the part of the original implementation. Dealing with base64 PSBT encoding: it seems that we convert the buffer from a base 8 to a base 6 using the convertBytes function. Is someone that could explain me the aim of this conversion ?Read more

Last week our teacher gave us a question about Huffman Encoding Algorithm described as below. HUFFMAN ENCODING ALGORITHM: Consider all pairs: . Choose the two lowest frequencies, and make them brothers, with the root having the combined frequency. Iterate. The question was to find the Final Binary Tree and Variable Length Codes for the givenRead more

On Windows system, Mathematica by default opens stream which will automatically transform any “\n” into “\r\n”. But I want pure line feed. In this post, librik suggested using BinaryFormat->True in OpenWrite to explicitly control newline behaviour. In this way, tmp = OpenWrite[file, BinaryFormat -> True]; WriteString[tmp, “test”, “\n”, “test”]; Close[tmp] will give correctly in which,Read more

Estoy teniendo problemas en un servicio hecho con web API en VS2015. El tema es que tengo que recibir un post en formato XML con Encoding ISO-8859-1 y no esta parseando a mi clase. Si le coloco UTF-8 funciona todo perfecto, el problema es con ese encoding. Ya coloqué en el WebApiConfig lo siguiente peroRead more

I’ve written a huffman compression program that works as intended, however in order to intuitively lay out the processes required to write the compressed file, I used strings in critical functions that I suspect are causing a performance hit. I came here to get ideas from the community on ways that I can go aboutRead more

Upon submission of a custom-coded form, I’m redirecting to a URL that includes query parameters. How can I prevent Drupal from URL-encoding those parameters? Example: $ params = [ ‘something’ => ‘1,2,3’, ‘something_else’ => ‘4,5,6’, ]; $ url = Url::fromRoute(‘<current>’, $ params); $ form_state->setRedirectUrl($ url); Results in the URL below: http://example.com/page?something=1%2C2%2C3&something_else=4%2C5%2C6 But I’d like: http://example.com/page?something=1,2,3&something_else=4,5,6Read more

I’m reading this report on unicode security and found the following paragraphs confusing: When converting from a multi-byte encoding, a byte value may not be a valid trailing byte, in a context where it follows a particular leading byte. For example, when converting UTF-8 input, the byte sequence E3 80 22 is malformed because 0x22Read more