How to set the default app that will run an executable file

I'm working on an assembler that gets assembly code and generates machine code in a binary file.

On the other side I develop an interpreter that reads the machine code generated and interprets it.

I do something like this:

myas foo.asm -o out
myint out

(myas is my assembler application and myint is the interpreter application and both are nodejs applications)

Is there a way to set the program that runs the executable file in the executable file, somehow?

Instead doing myint out I want to do ./out (running it as executable).

If I have an executable file that I want to run with node I put this on the first line: #!env/node.

How can I set myint command to run out file?

Best How To :

I applied the hack with the env start.

The assembler knows to append first the snippet:

#!/usr/bin/env arc-int

I also make the file executable:

Fs.chmodSync(OUTPUT_FILE, 0755);

And then the interpreter knows to not to interpret that snippet.

I open-sourced the assembler and the interpreter here.

How to get my node.js mocha test running?

javascript,node.js,mocha,supertest

Create a separate file called app.js. The only purpose of this file would be to run the server. You'll also need to export your app object from server.js. So, your server.js would look like this // set up ====================================================================== var express = require('express'); var app = express(); // create our...

Bash alias function with predefined argument

bash

Simply, add it in your .bashrc like: alias gl10="gitLog 10" To apply the changes: source ~/.bashrc...

Waiting for promises - code hangs

javascript,node.js,promise

What you want is validate = function(data) { var p = new Promise(function(resolve, reject)){ var all_promises = Array(); all_promises.push(resBooking); resBooking.count(...).then(...).catch(...); Promise.all(all_promises).then(resolve); }); return p; }; In other words, call resolve, not p.resolve(). p.resolve will generate a run-time error (p doesn't exist), which will be "swallowed" by the promise constructor and...

shell script cut from variables

bash,shell,shellcode

With GNU grep: grep -oP 'aaa&\K.*' file Output: 123 456 \K: ignore everything before pattern matching and ignore pattern itself From man grep: -o, --only-matching Print only the matched (non-empty) parts of a matching line, with each such part on a separate output line. -P, --perl-regexp Interpret PATTERN as a...

What type of database is the best for storing array or object like data [on hold]

database,node.js,sockets

Redis would probably be fastest, especially if you don't need a durability guarantee - most of the game can be played out using Redis' in-memory datastore, which is probably gonna be faster than writing to any disk in the world. Perhaps periodically, you can write the "entire game" to disk....

AWK write to new column base on if else of other column

linux,bash,shell,awk,sed

You can use: awk -F, 'NR>1 {$0 = $0 FS (($4 >= 0.7) ? 1 : 0)} 1' test_file.csv ...

What does a [Function] (wrapped in square brackets) mean when inside of a javascript object?

javascript,node.js,javascript-objects

I'm able to replicate the output with the following setup: > function bar() {} > bar.baz = 42; > console.log({foo: bar}); { foo: { [Function: bar] baz: 42 } } So ObjectId: { [Function: ObjectId] schemaName: 'ObjectId' } } means that ObjectId is the property of an object. The value...

How to append entry the end of a multi-line entry using any of stream editors like sed or awk

linux,bash,awk,sed,sh

Here's a sed version: /^Host_Alias/{ # whenever we match Host_Alias at line start : /\\$/{N;b} # if backslash, append next line and repeat s/$/,host25/ # add the new host to end of line } If you need to add your new host to just one of the host aliases, adjust...

Create n:m objects using json and sequelize?

javascript,json,node.js,sequelize.js

Have a look at nested creation (the feature is not documented yet) Store.create({ name:'corner store', address: '123 Main Street', products: [ { name: 'string beans' }, { name: 'coffee' }, { name: 'milk' } ] }, { include: [Product] }); This will create both stores and products and associate the...

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node.js,heroku

I resolved it. I think, I asked incorrect question. The problem was in missing bower command installation for dependencies when deploy.

How do I check whether a file or file directory exist in bash?

bash,if-statement

Checking file and/or directory existence To check whether a file exists in bash, you use the -f operator. For directories, use -d. Example usage: $ mkdir dir $ [ -d dir ] && echo exists! exists! $ rmdir dir $ [ -d dir ] && echo exists! $ touch file...

shell script for counting replacements

bash,replace,count

Assuming you want to replace the word 'apple' with 'banana' (exact match) in the contents of the files and not on the names of the files (see my comment above) and that you are using the bash shell: #!/bin/bash COUNTER=0 for file in *.txt ; do COUNTER=$(grep -o "\<apple\>" $file...

Capitalize all files in a directory using Bash

osx,bash,rename

In Bash 4 you can use parameter expansion directly to capitalize every letter in a word (^^) or just the first letter (^). for f in *; do mv -- "$f" "${f^}" done You can use patterns to form more sophisticated case modifications. But for your specific question, aren't you...

How do I run C# within a Node.js server application?

c#,node.js,server

I have idea for your problem . U can write c# console app and then call it from nodejs . U can look this url Execute an exe file using node.js . after c# job writes all data to database, u can look to the this table read from it...

Assign and use of a variable in the same subshell

bash,scope,subshell

Let's look to the POSIX specification to understand why this behaves as it does, not just in bash but in any compliant shell: 2.10.2, Shell Grammar Rules From rule 7(b), covering cases where an assignment precedes a simple command: If all the characters preceding '=' form a valid name (see...

Sockets make no sense?

javascript,node.js,sockets

The client doesn't get to cause arbitrary events to fire on the socket. It is always a message event. Using the same client, try this server code in your connection handler: socket.on('message', function(data) { // data === "pressed", since that's what the client sent console.log("Pressed!"); socket.close(); }); ...

mongodb populate method not working

node.js,mongodb,model,populate,auto-populate

When you create an instance of the Post model, you need to assign the _id from the user as an ObjectId, not a string: var ObjectId = require('mongoose').Types.ObjectId; Post.create({ text: 'farheen123', created_by: new ObjectId('5587bb520462367a17f242d2') }, function(err, post) { if(err) console.log("Farheen has got error"+err); else console.log(post); }); ...

I'd like to count the documents with the matching “name” property AND group them by “name” at the same time

node.js,mongoose,group-by

If you want mongodb to handle the query internally you could use the aggregation framework. In mongodb it looks like: db.users.aggregate( [{ $group: { _id: '$firstName', // similar to SQL group by, a field value for '_id' will be returned with the firstName values count: {$sum: 1} // creates a...

Socket.IO message doesn't update Angular variable

javascript,angularjs,node.js,sockets

You need to wrap the change of the model (changing properties on the $scope), with $scope.$apply(function() {}) in order to to update the view. var container = angular.module("AdminApp", []); container.controller("StatsController", function($scope) { var socket = io.connect(); socket.on('message', function (msg) { console.log(msg); $scope.$apply(function() { $scope.frontEnd = msg; }); }); }); $apply()...

Python: can't access newly defined environment variables

python,bash,environment-variables

After updating your .bashrc, perform source ~/.bashrc to apply the changes. Also, merge the two BONSAI-related calls into one: export BONSAI=/home/me/Utils/bonsai_v3.2 UPDATE: It was actually an attempt to update the environment for some Eclipse-based IDE. This is a different usecase altogether. It should be described in the Eclipse help. Also,...

How do I silence the HEAD of a curl request while using the silent flag?

bash,shell,curl,command-line,pipe

Try this: curl --silent "www.site.com" > file.txt ...

Emitting and receiving socket io within the same file

node.js,express,socket.io

If you are trying to emit and listen for events within the same file, you should be using the built in event listeners for node, not the specialized ones for socket.io (https://nodejs.org/api/events.html): var EventEmitter = require('events').EventEmitter; var eventExample = new EventEmitter; //You can create event listeners: eventExample.on('anEvent', function(someData){ //Do something...

how to modify an array value with given index?

arrays,linux,bash

You don't need the quotes. Just use ${i}, or even $i: pomme[${i}]="" Or pomme[$i]="" ...

Is express similar to grunt? what is the difference? what are the advantages of express over grunt?

node.js,express,gruntjs,mean-stack

Express is a webserver framework on top of nodejs (like symphony for php). Grunt is an automation tool (like make or gulp) and not a webserver. The only thing they have in common is, that they use the JavaScript programming language. MEAN is a full stack environment for developing web...

Error is not thrown inside a deferred method

node.js,exception-handling,deferred

The behavior of deferred seems reasonable to me in your cases. In the second case, I don't think that deferred has a way to catch the error thrown in the nextTick callback. So the error is thrown. In the first case, deferred catches it and considers that that resulting promise...

how can I import a file in node.js?

javascript,node.js

You will need to change this line: var template={ to this: module.exports={ And then you can simply do: var template = require('./path/to/template.js'); Note that this is a relative path to your file. You need to set module.exports because that is the convention NodeJS uses to say "this is what will...

Identifying when a file is changed- Bash

bash,shell,unix

I would store the output of find, and if non-empty, echo the line break: found=$(find . -name "${myarray[i]}") if [[ -n $found ]]; then { echo "$found"; echo "<br>"; } >> "$tmp" fi ...

How to change svn:externals from bash file non-interactive

bash,svn,svn-externals

Use svn ps svn:externals svn://hostname/branchname -F extenals.txt http://svnbook.red-bean.com/en/1.8/svn.ref.svn.c.propset.html...

Extra backslash when storing grep in a value

linux,bash

The output from set -x uses single quotes. So the outer double quotes were replaced with single quotes but you can't escape single quotes inside a single quoted string so when it then replaced the inner double quotes it needed, instead, to replace them with '\'' which ends the single...

Replace nodejs for python?

python,node.js,webserver

You might want to have a look at Tornado. It is well-documented and features built-in support for WebSockets. If you want to steer clear of the Tornado-framework, there are several Python implementations of Socket.io. Good luck!...

NPM : how to just run post-install?

node.js,npm,package.json

You can run individual script entries using npm run SCRIPTNAME: $ npm run postinstall ...

websockets - reject a socket connection

node.js,sockets,websocket

You can either use socket.close() or socket.terminate() to close the connection.

Bash modify CSV to change a field

linux,bash,awk

Please save following awk script as awk.src: function date_str(val) { Y = substr(val,0,4); M = substr(val,5,2); D = substr(val,7,2); date = sprintf("%s-%s-%s",Y,M,D); return date; } function time_str(val) { h = substr(val,9,2); m = substr(val,11,2); s = substr(val,13,2); time = sprintf("%s:%s:%s",h,m,s); return time; } BEGIN { FS="|" } # ## MAIN...

Node Server - Source Code accessible

node.js,express

The obvious answer is to change the directory used in the express.static() middleware if you're using that. Typically there is a public or similarly-named directory that you would create that holds only your public assets. Remove the app.use(express.static(__dirname + '/'));, this is what is allowing your code to be public....

node ssh2 shell unable to run apt-get install on remote machine

node.js

Try to change \nwith &&: stream.end('sudo apt-get update -y && sudo apt-get install -y build-essential && exit'); ...

Redis: Delete user token by email ( find Key by Value )

node.js,express,redis

You basically have to choose one of two approaches: a full scan of the database or an index. A full scan, as proposed in another answer to this question, will be quite inefficient - you'll go over your entire keyspace (or at least all the tokens) and will need to...

What are some patterns I can look at for database implementations in JavaScript?

javascript,node.js,mongodb

That's a pretty wide question, partly opinion based. This question should be closed, but I still want to give you some advice. There once was the Active Record pattern, which has been proven to be pretty difficult to maintain. The solution was the DAO pattern, but this adds a lot...

node.js winston logger no colors with nohup

node.js,logging,nohup,winston

It's caused by colors package (used by winston) that performs the following check when trying to determine whether to support colors: if (process.stdout && !process.stdout.isTTY) { return false; } This means that when your application is running in a background, it doesn't have a terminal and colors are not used....

Macports switch PHP CLI version

php,bash,drupal,terminal,macports

Do not modify files in /usr/bin. That's Apple's turf, and there are always other possibilities to avoid changing things there, especially since Apple's next update will happily revert these changes again and scripts might rely on /usr/bin/php being exactly the version Apple shipped with the OS. Put the original binary...

How to use promises to do series without duplicate code

node.js,promise,bluebird

Just use a loop. var lastPromise = Promise.resolve(); for (var x = 0; x < 100; x++) { lastPromise = lastPromise.then(function () { return object.asyncFunc(); }); } You could also use Promise.reduce over an array with a length of 100 to achieve the same effect. Promise.reduce(new Array(100), function () {...

nodejs head request isn't triggering events

node.js,http

The problem is that you don't declare a data or readable event handler. According to the fine manual: A Readable stream will not start emitting data until you indicate that you are ready to receive it. Instead, the stream will be put in a "paused" state indefinitely (until you start...

Getting CROS Error even after adding header in node.js for Angular js

javascript,angularjs,node.js

The error message spells it out for you. Your client side code is trying to set an Access-Control-Allow-Origin header: RestangularProvider.setDefaultHeaders({"Access-Control-Allow- Origin":"*"}); Your server side code allows a number of headers, but that isn't one of them: 'Access-Control-Allow-Headers': 'Origin, X-Requested-With, Content-Type, Accept"', Remove the line: RestangularProvider.setDefaultHeaders({"Access-Control-Allow- Origin":"*"}); Access-Control-Allow-Origin is a response...

bash interactive script pass input

bash,command-line-arguments

If you want to redirect the normal standard input of the program, you could use so called "here documents" (see e.g. the BASH manual page): java -jar script.jar <<EOF your input here EOF That means standard input (a.k.a. stdin) is redirected and will be the text in the "here document",...

NodeJS / ExpressJS check valid token parameter before routing

node.js,express,parameters

Use a middleware. app.use(function (req, res, next) { if (checkToken(req.query.token) { return next(); } res.status(403).end("invalid token"); }); app.use(require('./controllers')) ...

call functions in async with node which is more recomended Q or callback

javascript,node.js,callback,promise,q

I don't even see why you particularly need promises for this. function myHandler(req, res) { var dataChunks = [], dataRaw, data; req.on("data", function (chunk) { dataChunks.push(chunk); }); req.on("end", function () { dataRaw = Buffer.concat(dataChunks); data = dataRaw.toString(); console.log(data); var filePath = 'C://test.txt'; var writeStream = fs.createWriteStream(filePath, {flags: 'w'}); writeStream.write(data); writeStream.on('finish',...

Access Node-Webkit App from other Application

node.js,node-webkit

I'm not familiarized with the applescript language, but is possible between languages that have an implemented library for socket.io Using socket.io you can behave between applications, socket.io act like an node.js EventEmitter (or pubsub), clients can send events and suscribe to those events in real-time. For your case you can...

linux - running a process and tailing a file simultaneously

bash,shell,tail

I would simply start the tail in background and the python process in foreground. When the python process finishes you can kill the tail, like this: #!/bin/bash touch /tmp/out # Make sure that the file exists tail -f /tmp/out & pid=$! python test.py kill "$pid" ...

While loop in bash using variable from txt file

linux,bash,rhel

As indicated in the comments, you need to provide "something" to your while loop. The while construct is written in a way that will execute with a condition; if a file is given, it will proceed until the read exhausts. #!/bin/bash file=Sheetone.txt while IFS= read -r line do echo sh...

Bash script using sed acts differently when passing variable

bash,sed

Your variable is still within single quote hence not getting expanded. Use: sed -i 's|^$'"$CHECK"' = $*.|\1'6'|' /user/file.txt ...

Matching string inside file and returning result

regex,string,bash,shell,grep

Using sqlite3 from bash on OS X seems fairly straightforward (I'm no expert at this, by the way). You will need to find out which table you need. You can do this with an interactive session. I'll show you with the database you suggested: /Users/fredbloggs> sqlite3 ~/Library/Application\ Support/Dock/desktoppicture.db SQLite version...