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What is the Ruby equivalent of Node.js' socket.io?


What is the Ruby equivalent of Node.js' socket.io?

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What is the Ruby equivalent of Node.js' socket.io?
Tag : ruby-on-rails , By : user121350
Date : November 24 2020, 05:44 AM


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What is the equivalent of php's fgetc() for Node.js socket's?


Tag : php , By : Tink
Date : March 29 2020, 07:55 AM
will help you The docs have an excellent example of how to connect to a server over the network.
var net = require('net');
var client = net.connect({port: 8124},
    function() { //'connect' listener
  console.log('client connected');
  client.write('world!\r\n');
});
client.on('data', function(data) {
  console.log(data.toString());
  client.end();
});
client.on('end', function() {
  console.log('client disconnected');
});
var net = require('net');


var max = 1024 * 1024 // 1 MB, the maximum amount of data that we will buffer (prevent a bad server from crashing us by filling up RAM)
    , allocate = 4096; // how much memory to allocate at once, 4 kB (there's no point in wasting 1 MB of RAM to buffer a few bytes)
    , buffer=new Buffer(allocate) // create a new buffer that allocates 4 kB to start
    , nread=0 // how many bytes we've buffered so far
    , nproc=0 // how many bytes in the buffer we've processed (to avoid looping over the entire buffer every time data is received)
    , client = net.connect({host:'example.com', port: 8124}); // connect to the server

client.on('data', function(chunk) {
    if (nread + chunk.length > buffer.length) { // if the buffer is too small to hold the data
        var need = Math.min(chunk.length, allocate); // allocate at least 4kB
        if (nread + need > max) throw new Error('Buffer overflow'); // uh-oh, we're all full - TODO you'll want to handle this more gracefully

        var newbuf = new Buffer(buffer.length + need); // because Buffers can't be resized, we must allocate a new one
        buffer.copy(newbuf); // and copy the old one's data to the new one
        buffer = newbuf; // the old, small buffer will be garbage collected
    }

    chunk.copy(buffer, nread); // copy the received chunk of data into the buffer
    nread += chunk.length; // add this chunk's length to the total number of bytes buffered

    pump(); // look at the buffer to see if we've received enough data to act
});

client.on('end', function() {
    // handle disconnect
});


client.on('error', function(err) {
    // handle errors
});


function find(byte) { // look for a specific byte in the buffer
    for (var i = nproc; i < nread; i++) { // look through the buffer, starting from where we left off last time
        if (buffer.readUInt8(i, true) == byte) { // we've found one
            return i;
        }
    }
}
function slice(bytes) { // discard bytes from the beginning of a buffer
    buffer = buffer.slice(bytes); // slice off the bytes
    nread -= bytes; // note that we've removed bytes
    nproc = 0; // and reset the processed bytes counter
}

function pump() {
    var pos; // position of a EOT character

    while ((pos = find(0x04)) >= 0) { // keep going while there's a EOT (0x04) somewhere in the buffer
        if (pos == 0) { // if there's more than one EOT in a row, the buffer will now start with a EOT
            slice(1); // discard it
            continue; // so that the next iteration will start with data
        }
        process(buffer.slice(0,pos)); // hand off the message
        slice(pos+1); // and slice the processed data off the buffer
    }
}

function process(msg) { // here's where we do something with a message
    if (msg.length > 0) { // ignore empty messages
        // here's where you have to decide what to do with the data you've received
        // experiment with the protocol
    }
}

Is there a node/npm equivalent for Ruby's `bundle open #{gem_name}`?


Tag : ruby , By : George H.
Date : March 29 2020, 07:55 AM
I hope this helps . You can use the npm edit command to do this
Description

Ruby equivalent of Node .toString('ascii')


Tag : node.js , By : Willem van Schevikho
Date : March 29 2020, 07:55 AM
I hope this helps you . Okay well I am not that familiar with Node.js but you can get fairly close with some basic understandings:
Node states:
def node_js_ascii(bytes) 
  bytes.map {|b| b % 128 }
    .reject(&127.method(:==))
    .pack('C*')
    .encode(Encoding::UTF_8)
end
node_js_ascii(a)
#=>  #=> "5qx9\bpR\"Ho\u0004.\u0012R>\u0005XPa:\vj|v\u0013?T\u001E~xL"
a = [53, 127, 241, 120, 57, 136, 112, 210, 162, 200, 111, 132, 46, 146, 210, 62, 133, 88, 80, 97, 58, 139, 234, 252, 246, 19, 191, 84, 30, 126, 248, 76].map do |b| 
    b < 128 ? b : b - 128
end.pack('C*')
#=> "5\x7Fqx9\bpR\"Ho\x04.\x12R>\x05XPa:\vj|v\x13?T\x1E~xL"
a.encode(Encoding::UTF_8)
#=> "5\u007Fqx9\bpR\"Ho\u0004.\u0012R>\u0005XPa:\vj|v\u0013?T\u001E~xL"
 a = [53, 127, 241, 120, 57, 136, 112, 210, 162, 200, 111, 132, 46, 146, 210, 62, 133, 88, 80, 97, 58, 139, 234, 252, 246, 19, 191, 84, 30, 126, 248, 76].map do |b| 
    b < 127 ? b : b - 128
end.pack('C*')
#=> "5\xFFqx9\bpR\"Ho\x04.\x12R>\x05XPa:\vj|v\x13?T\x1E~xL"
a.encode(Encoding::UTF_8, undef: :replace, replace: '')
#=> "5qx9\bpR\"Ho\u0004.\u0012R>\u0005XPa:\vj|v\u0013?T\u001E~xL"

Ruby Rails .inject equivalent in Node.js


Tag : javascript , By : user157064
Date : March 29 2020, 07:55 AM
hope this fix your issue You can use reduce:
 const reducer = (rates, c) => Object.assign(rates, { [c.currency]: c.rate } )
 const result = all_rates.reduce(reducer, {})

HTTP Status Code 200 but page does not load Node.js Socket.io -- Node.js Tutorial With Socket.io, Daniel Nill, fs.readFi


Tag : node.js , By : user179190
Date : March 29 2020, 07:55 AM
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