decode | 易学教程

Decoding and matching Chip 8 opcodes in C/C++

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问题 I'm writing a Chip 8 emulator as an introduction to emulation and I'm kind of lost. Basically, I've read a Chip 8 ROM and stored it in a char array in memory. Then, following a guide, I use the following code to retrieve the opcode at the current program counter (pc): // Fetch opcode opcode = memory[pc] << 8 | memory[pc + 1]; Chip 8 opcodes are 2 bytes each. This is code from a guide which I vaguely understand as adding 8 extra bit spaces to memory[pc] (using << 8) and then merging memory[pc

What is the fool proof way to convert some string (utf-8 or else) to a simple ASCII string in python

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问题 Inside my python scrip, I get some string back from a function which I didn't write. The encoding of it varies. I need to convert it to ascii format. Is there some fool-proof way of doing this? I don't mind replacing the non-ascii chars with blanks or something else... 回答1: If you want an ASCII string that unambiguously represents what you have got, without losing any information , the answer is simple: Don't muck about with encode/decode, use the repr() function (Python 2.X) or the ascii()

Decoding ampersand hash strings (&#124&#120&#97)etc

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问题 The solutions in other answers do not work when I try them, the same string outputs when I try those methods. I am trying to do web scraping using Python 2.7. I have the webpage downloaded and it has some characters which are in the form &#120 where 120 seems to represent the ascii code. I tried using HTMLParser() and decode() methods but nothing seems to work. Please note that what I have from the webpage in the format are only those characters. Example: &#66&#108&#97&#115&#116&#101&#114&

perl: convert a string to utf-8 for json decode

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问题 I'm crawling a website and collecting information from its JSON. The results are saved in a hash. But some of the pages give me "malformed UTF-8 character in JSON string" error. I notice that the the last letter in "cafe" will produce error. I think it is because of the mix of character types. So now I'm looking for a way to convert all types of character to utf-8 (hope there is a way perfect like that). I tried utf8::all, it just doesn't work (maybe I didn't do it right). I'm a noob. Please

Decode JSON with jQuery / AJAX

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问题 I'm trying to decode a JSON with jQuery. Here's what I get (for instance a class, here with one student): "{"Students":[{"Name":John,"Grade":17,}],"TotalClass":17,"TotalCount":1,}" here's what I do: $j.ajax({ type: 'POST', url: 'class.aspx/getClass', contentType: 'application/json; charset=utf-8', dataType: 'json', success: function (msg) { $j.each(msg, function (index, element) { alert(element.TotalClass); }); }, }); It keeps saying undefined in the alert (but I recieve the right JSON). Any

media foundation H264 decoder not working properly

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I'm creating an application for video conferencing using media foundation and I'm having an issue decoding the H264 video frames I receive over the network. The Design Currently my network source queues a token on every request sample, unless there is an available stored sample. If a sample arrives over the network and no token is available the sample is stored in a linked list. Otherwise it is queued with the MEMediaSample event. I also have the decoder set to low latency. My Issue When running the topology using my network source I immediately see the first frame rendered to the screen. I

How to decode base 64 format in jmeter?

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Does anyone know a solution to decode a base 64 format string in JMeter? I have to decode the a response, but i don't want to reinvent the wheel... Do i have to write the code by myself (hope not)? Thanks Your solution is pretty good. However you can use Beanshell Post Processor and refer previous sampler response data as data (see JMeter Pre-defined Beanshell variables section) import org.apache.commons.codec.binary.Base64; vars.put("decoded_response", new String(Base64.decodeBase64(data))); My current solution is: import org.apache.commons.codec.binary.Base64; log.info("Decoding base64

Using decode() vs. regex to unescape this string

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问题 I have the following string and I'm trying to figure out the best practice for unescaping it. The solution has to be somewhat flexible in that I'm receiving this input from an API and I can't be absolutely certain that the current character structure ( \n as opposed to \r ) will always be the same. '"If it ain\'t broke, don\'t fix it." \nWent in for a detailed car wash.\nThe attendants raved-up my engine when taking the car into the tunnel. NOTE: my car is...' This regex seems like it should

How to decode a unicode string Python [duplicate]

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问题 This question already has answers here : Why doesn't this conversion to utf8 work? (4 answers) Closed 3 years ago . What is the best way to decode an encoded string that looks like: u'u\xf1somestring' ? Background: I have a list that contains random values (strings and integers), I'm trying to convert every item in the list to a string then process each of them. Turns out some of the items are of the format: u'u\xf1somestring' When I tried converting to a string, I get the error:

Swift 4 - JSON parsing with Codable protocol (nested data)

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I am trying to update myself and use modern and recent Swift 4 features. That is why I am training with the Codable protocol in order to parse JSON and directly map my model object. First of all, I did some research and self learning. This article helped me a lot : Ultimate guide I just need to focus on the "Com" array. As you can notice, it contains some nested object. I named them Flash Info. It is defined by : endDate text image[] title productionDate id So here is my Codable Struct : struct FlashInfo : Codable { let productionDate: String let endDate: String let text: String let title: