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sudo tcpdump -A -s0 -ilo0 port 24224 or port 12201 or port 8125

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1) In your terminal, open the file using vim:

vim file_name
2) Remove all BOM characters:

:set nobomb
3) Save the file:

:wq

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ssh-keygen -t rsa -b 4096 -N '' -C "rthijssen@gmail.com" -f ~/.ssh/id_rsa
ssh-keygen -t rsa -b 4096 -N '' -C "rthijssen@gmail.com" -f ~/.ssh/github_rsa
ssh-keygen -t rsa -b 4096 -N '' -C "rthijssen@gmail.com" -f ~/.ssh/mozilla_rsa

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type arr = number[];
type multiple = number[][];
type irregular = any[];

const flatten = (arr : arr | multiple | irregular) : number[] => {
  const newState : number[] = [];

  for (let item of arr) {

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# SSL self signed localhost for rails start to finish, no red warnings. 

# 1) Create your private key (any password will do, we remove it below)

$ openssl genrsa -des3 -out server.orig.key 2048


# 2) Remove the password

$ openssl rsa -in server.orig.key -out server.key

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Virtual Hosts on nginx (CSC309)

When hosting our web applications, we often have one public IP address (i.e., an IP address visible to the outside world) using which we want to host multiple web apps. For example, one may wants to host three different web apps respectively for example1.com, example2.com, and example1.com/images on the same machine using a single IP address.

How can we do that? Well, the good news is Internet browsers

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// Quiero crear un loop que corra cada 1000 miliseconds, pero que espere a que
// el anterior termine
// incorrecto: http://g.recordit.co/p8ssRrRY27.gif
// correcto: http://g.recordit.co/OFFYS9Nd6F.gif
function doStuff(){
  setTimeout(function(){
    console.log('done doing stuff');
  }, 3000);
};

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Setup babel + gulp + jasmine + browserify + babelify

ES2015 it's awesome and babel.js is a great tool for compiling ES2015 into javascript code. If you take a look at babel's documentation, you'll find out over than 20 different ways to install babel.js from node to .NET. One of the greatets features in ES2015 is import and export but you can't use it in the browser :( right out of the box. If you want to use modules in the browser you will need to do a trick and use browserify + babelify.

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Javascript FAQS

How can I create a function which only runs just one time?

I have a method that is running multiple times and I'm not sure why. Since this method does a ajax call, I don't want to fetch the same data twice.

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@mixin bg-image($image) {
  // other properties
  background-image: image-url($image);
  // other properties
}

.myclass {
  @include bg-image('asadas.jpg');
}