message-passing | 易学教程

Node.Js in Erlang style?

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问题 I am a complete noob when it comes to both Node.Js and Erlang. But wouldn't it be possible to build a Node.js app that emulates Erlang behavior? e.g. you pass json messages across an distributed node.js server park and even pass new code to those servers w/o going offline, just like erlang. If you have a message handler callback that is activated when a message is received, then this message handler could check if the message is a code update message and thus replace itself(the current

Does Erlang always copy messages between processes on the same node?

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问题 A faithful implementation of the actor message-passing semantics means that message contents are deep-copied from a logical point-of-view, even for immutable types. Deep-copying of message contents remains a bottleneck for implementations the actor model, so for performance some implementations support zero-copy message passing (although it's still deep-copy from the programmer's point-of-view). Is zero-copy message-passing implemented at all in Erlang? Between nodes it obviously can't be

Message passing in chrome extension not working

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问题 I'm new to chrome extensions and I'm having a bit of trouble getting started. First of all my overall goal is to be able to click a button in my popup and have something in the DOM change. If I understand correctly, the way to do this is to load a content script and send this content script a message. This is what I have from looking at the Chrome developers page, but I don't see anything in the console log: manifest.json { "manifest_version": 2, "name": "Test", "version": "1.0", "permissions

How to choose the “Key” for inter-processes communication in Linux?

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问题 Good Day... I am doing a homework which states that I have 5 processes; a server and the rest are clients. Each process is supposed to be sparked from a different executable . I am going to implement a two-way message passing solution, but the question is not about message passing per se. Is there an elegant way to communicate the key between those different executables. i.e. when I call the following function: int msgget(key_t key, int msgflg); How are other processes supposed to know the

How to implement message passing in Firefox extension?

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问题 I have a file which overwrites overlay.xul that overwrites browser.xul . I want to implement message passing in a similar way as implemented in chrome extensions. chrome.manifest- content helloworld content/ overlay chrome://browser/content/browser.xul chrome://helloworld/content/overlay.xul overlay chrome://navigator/content/navigator.xul chrome://helloworld/content/overlay.xul skin helloworld classic/1.0 skin/ style chrome://global/content/customizeToolbar.xul chrome://helloworld/content

Method delegation in python

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问题 I'm writing a small framework for orchestrating AWS clusters and there are some common hierarchical patterns that appear over and over again. One such pattern is gathering a collection of instances into a bigger object and then delegating some methods down to all the instances directly. So instead of copying and pasting the same boilerplate code over and over again I abstracted it with the following pattern: def __getattr__(self, item): if not item in self._allowed_items: raise

Node.Js in Erlang style?

阅读更多关于 Node.Js in Erlang style?

I am a complete noob when it comes to both Node.Js and Erlang. But wouldn't it be possible to build a Node.js app that emulates Erlang behavior? e.g. you pass json messages across an distributed node.js server park and even pass new code to those servers w/o going offline, just like erlang. If you have a message handler callback that is activated when a message is received, then this message handler could check if the message is a code update message and thus replace itself(the current handler) with the new code. So it should be possible to have Node.Js servers with no downtime for code

The actor model: Why is erlang special? Or, why do you need another language for it?

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问题 I've been looking into learning erlang, and as a result, have been reading (okay, skimming) about the actor model. From what I understand, the actor model is simply a set of functions (run within lightweight threads called "processes" in erlang), which communicate with each other only via message passing. This seems fairly trivial to implement in C++, or any other language: class BaseActor { std::queue<BaseMessage*> messages; CriticalSection messagecs; BaseMessage* Pop(); public: void Push

How to implement message passing in Firefox extension?

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I have a file which overwrites overlay.xul that overwrites browser.xul . I want to implement message passing in a similar way as implemented in chrome extensions. chrome.manifest- content helloworld content/ overlay chrome://browser/content/browser.xul chrome://helloworld/content/overlay.xul overlay chrome://navigator/content/navigator.xul chrome://helloworld/content/overlay.xul skin helloworld classic/1.0 skin/ style chrome://global/content/customizeToolbar.xul chrome://helloworld/content/overlay.css How to I register content_script.js which in my case is overlay.js ? Overlay.xul - <script

Chrome Extension - Message Passing to batch file

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问题 I used the sample project https://developer.chrome.com/extensions/samples I am able to run the python native app. Is there any way to get the message within native-messaging-example-host.bat I don't want to load python script What I want to do here is send message from chrome {text: "xyz.bat"} and the batch file should run START xyz.bat 回答1: You should not approach this problem from the batch file standpoint, as in lieu of my solution, it requires the program to be run upfront, which in most