Here is the one liner. ls -lhtTr It will output something like total 24152 -rw-rw-r-- 1 sean staff 1.0M May 4 14:31:42 2019 4c2caf52cb084ea39a6a65a0e68ee382 -rw-rw-r-- 1 sean staff 1.0M May 4 14:31:44 2019 76eeeea5d...

Here is the one liner. ls -lhtTr It will output something like total 24152 -rw-rw-r-- 1 sean staff 1.0M May 4 14:31:42 2019 4c2caf52cb084ea39a6a65a0e68ee382 -rw-rw-r-- 1 sean staff 1.0M May 4 14:31:44 2019 76eeeea5d...

Here is some very simple code to render React components dynamically without using a framework or routing library. It doesn't cover pushState and URL parsing, so in that sense it isn't a routing library. But it does let you render components from othe...

Here is an extension you can use in your Swift (v4) projects that makes it easy to parse parameters from a url. Given a url like, "http://example.com/?x=1&y=2", you can extract the x and y parameters into a key, value data structure. Here is the s...

The documentation for Python's shutil.make_archive is very confusing. Considering that the arguments to this function only need to be source and destination, makes it even more frustrating to try and reason about. Here are the relevant docs from the p...

Here is an extension to base 64 encode and decode strings in Swift (3) extension String { func fromBase64() -> String? { guard let data = Data(base64Encoded: self) else { return nil } return String(data: data, encoding: ....

The double tap event isn't supported in libraries like jQuery Mobile (out of date anyway). But coding up your own function is very easy. We will compare time in milliseconds between tap or click, events. The reason for both tap and click events is due ...

The basic approach is to use the `document.querySelectorAll` to match certain elements, then manually set the display property to 'none' or 'block' (or 'inline-block') to hide or show it. Using the `match` method allows us to detect whether or not the sea...

Here is a quick snippet for parsing query strings in PHP. You can use the `parse_url` and `parse_str` methods. `parse_str` will create a variable for you populated with results. $url = "http://www.seanbehan.com/path/?param=key"; parse_str(parse_url...

Here is a quick way to express a chance of something happening. This is an example in JavaScript that gives you a 1 in 3 chance of being true. [true, false, false].sort(function(){ return Math.random() >= 0.5 ? 1 : -1 })[0] Basically, we popu...

You can write reusable scripts with Postgres by taking advantage of named variables. A named variable starts with a `:` in your sql script. Here is an example select :a_number You can then use this statement with `psql` and the `--variable` fl...

Here is a snippet for generating a URL friendly slug in PHP function slugify($string){ return strtolower(trim(preg_replace('/[^A-Za-z0-9-]+/', '-', $string), '-')); } And you can use it in your code like so ...

Below is an example URL structure with rewrite rules using an Apache .htaccess file. GET /a/ => a/index.php GET /a/b/ => a/b/index.php GET /a/b/c/ => a/b/index.php This URL mapping will give you pretty URLs in PHP without needing t...

In React Native you see a lot of tutorials and articles using the `fetch` method when interacting with `JSON` APIs. It's great for this and the the pattern looks like this fetch(url).then((resp)=>{ return resp.json() }).then((json)=>{ console.log(json...

Here is a little snippet that will return new signups (or new records) for today select id, email, created_at::date date from signups where email not in (select distinct email from signups where created_at < current_date)

If you run into this error in development, using Rails 5 and Active Admin NoMethodError - undefined method `per_page_kaminari' Try the following. First, make sure you have an initializer in your application. # in config/initializers/kamina...

Matching email addresses in Javascript regex = /\b[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}\b/img "hello sean@example.com how are you? do you know bob@example.com?".match(regex) // => ["sean@example.com", "bob@example.com"]

There are a lot of practical uses for automating user behavior in a browser. Everything from testing your web application to logging into Twitter and auto following people. But first you have to install the tools. Here is everything you need to run yo...

Creating trigrams in Python is very simple trigrams = lambda a: zip(a, a[1:], a[2:]) trigrams(('a', 'b', 'c', 'd', 'e', 'f')) # => [('a', 'b', 'c'), ('b', 'c', 'd'), ('c', 'd', 'e'), ('d', 'e', 'f')] You can generalize this a little bit more ...

The following code will disable SSL verification when using Open SSL. OpenSSL::SSL::VERIFY_PEER = OpenSSL::SSL::VERIFY_NONE It is probably not a good idea to do this in production. But if you are just testing on your development machine it might...

This query and pattern will return urls in text all within a single SQL query. select substring(column_name from '.*://([^/]*)') as domain_name from table_name; And here it is in a larger query, say for retrieving page view counts for referrers. ...

You can use string interpolation in combination with a dictionary for simple formatting. print "My name is %(name)s and I have $%(change)0.2f in change in my pocket!" % { 'name': 'Sean', 'change': 00.23 } # My name is Sean and I have $0.23 in chang...

There is annoying line wrap issue present after installing iPython on OS X Mavericks for the first time. The issue has to do with readline being missing. To fix the problem uninstall iPython, install readline and then install iPython. pip uninstall ip...

You need to read from STDIN rather than parse command line arguments. while $stdin.gets puts $_ end

This regular expression matches non alphanumeric characters in a string. r = /[^a-z0-9]{1,}/i You can use it to create URL friendly slugs. slug = "hello world!".gsub(/[^a-z0-9]{1,}/i, '-').downcase # => hello-world In combination wit...

# Edit Rakefile in project root # # Add a new rake test task... E.g., rake test:lib, below everything else in that file... # Alternatively, add a task in lib/tasks/ directory and plop in the same code namespace :test do desc "Test lib source" ...

Here is a gist that demonstrates how easy it is to transform text using #gsub and a block with Ruby. "Scs Epc Score".gsub (/scs|epc/i) { |i| i.upcase } # => SCS EPC Score For more helpful string extensions in Ruby check out our Ruby Gem on GitHub...

I just wrote and released my first Ruby Gem, Hashed Attributes https://rubygems.org/gems/hashed_attributes. It is a very simple ActiveRecord extension for saving variables through a serialized hash. The Gem will let you declare getter and setter methods t...

Make a directory ( it can anywhere ) called baks/mysql mkdir -p /baks/mysql Create a file (it can be anywhere) called /root/mysql_backups.sh and put this script in it #!/bin/bash # modify the following to suit your environment export DB...

https://ajax.googleapis.com/ajax/libs/jquery/1.6.1/jquery.min.js That is the link to the jQuery source hosted by Google on their CDN. It's probably already cached on client machines so it should be as fast as is possible! You can read more/use other Java...

Short and sweet. Here all the commands I run in this order to set up a brand new box. It usually takes about 10 - 15 minutes on a 256 MB RAM instance. Compiling Ruby Enterprise Edition, which is super easy, will take the most amount of time. It will seem ...

It appears that the :disable_with option on the submit_tag form helper method does not behave as expected with remote forms. I'm not sure if this is a bug or not. But the fix is pretty straight forward, but perhaps a little difficult to trouble shoot. Usi...

If you use the link_to_function to replace content in a div with content from a partial, any javascript that you include in the partial will not be executed. It is instead included, but will do nothing. Obviously, this isn't the desired behavior. Why woul...

After installing Ruby Enterprise Edition, REE, and Passenger on Ubuntu you may see this error message when you run script/console for the first time ./script/console production # => Loading production environment (Rails 2.3.5) Rails requires RubyGems >=...

I was hoping to find a function in the Wordpress API, that goes something like this... the_child_categories("Vermont"); // print Burlington, Brattleboro... etc if this post has any child categories of Vermont But I could not. The result that I did ...

To clean up some repetitive html coding in views, pass a block of text to a helper function which will wrap it for you the same way, each and every time. For example, I have a 'help' link which will toggle the display of a block of text if a link is click...

Just for reference, here are the carrier email addresses for sending email as an SMS. Look up the carrier for the phone in question, then send an email in this format [telephonenumber]@[carrier-name.com] Carrier Email to SMS Gateway Alltel [10-digit p...

If you follow the instructions on how to install the Rails Redmine PM Software (available here) and are using Apache with Passenger (REE), you need to delete the .htaccess file that is kept in RAILS_ROOT/public directory. Otherwise you'll see a 404 page n...

When you use validations in Rails, db column names are used as 'keys' for error messages. This is usually the preferred way to go about it because this maps nicely to the form fields. However, if you use a virtual attribute this may not be the case. For e...

On your local machine cd into the .ssh directory in your home "~/" directory. If it doesn't exist you can create it with "mkdir ~/.ssh". Next generate your public/private keys and copy the public key to the remote server. cd ~/.ssh ssh-keygen ...

In the view there is a regular Rails form and a javascript function that will be triggered when the country select field is changed. The javascript function will make an ajax request to the country_select url with the country code passed as the id variabl...

Here is how to install a Rails application out of a subdirectory (rather than as a subdomain) with the Apache web server(Apache2). In this example I'm going to use my own blog which is a Wordpress installation and serve a Rails application from the subdir...

Simple script for posting a valid response back to Paypal service after a sale is completed using the Paypal Instant Checkout payment method. <?php // read the post from PayPal system and add 'cmd' $req = 'cmd=_notify-validate'; foreach ($_POST as $k...

Listing all files and directories using PHP 5. <?php $files = array(); $dir = dir("."); while(false!==($file=$dir->read())): if(($file{0}!=".") && ($file{0}!="~") && (substr($file, -3)!="LCK") && ($file!=basename($_SERVER["PHP_SELF"]))): ...

<%= hidden_field_tag :authenticity_token, form_authenticity_token %>

MySQL doesn't support having two columns with time stamping on both initialization and/or on updating at the same time. It would be nice to be able to do *this* where the created_at column gets the current_timestamp on initialization and the updated_at ge...

Download First install mod_python for Apache and then restart/reload the server. apt-get install libapache2-mod-python /etc/init.d/apache2 force-reload apache2ctl restart Next grab the web.py framework from webpy.org. You can grab the tar or use easy_in...

These aren't all of them, but I think they are some of the most useful. # making a directory in another directory that doesn't yet exist... FileUtils.mkdir_p '/path/to/your/directory/that/doesnt/exist/yet' # recursively remove a directory and the conten...

There must be a better way to do the following with PrototypeJS. I want to loop over nested links inside of table td cells and apply a class to the row that the link is in when the link is clicked. If a user clicks on another link the class will be remov...

gem install --no-rdoc --no-ri rails

I wanted to create a button for the TinyMCE Rich Text Editor for Wordpress. It was tough to find good docs on the subject. There are a couple of useful posts out there but in general I found them lacking. http://codex.wordpress.org/TinyMCE_Custom_Buttons...

Super simple to get double click "desktop" like functionality out of Prototype! For some reason, googling it doesn't yield many useful results. http://www.google.com/#hl=en&q=double+click+in+prototype+javascript&aq=f&oq=&aqi=&fp=peEfEjG9pWY :( Anyway, he...

Login as the root user or as a user that can execute sudo commands. #open this file for editing... vim /etc/ssh/sshd_config Find the line that reads Port 22 Change this to an different and an available port number... Port 8000 Next reload ssh /etc/...

You might use the attr_accessible method to create getters and setters for a class that has attributes which don't map directly to corresponding fields in a database. For example let's take the scenario where you are processing a credit card transaction. ...

How to find your user SHELL and PATH on Linux echo $PATH echo $SHELL Which will print the paths to the screen /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games /bin/bash

There is a helper method for handling the obfuscation of email addresses in Rails. mail_to "me@domain.com", "My email", :encode => "hex" # => My email If you want to then extract an email address(or all email addresses) from a block of text here is the...

TinyMCE is a nice little WYSIWYG for text processing online. It uses iFrames and Javascript callbacks to manipulate textarea form fields. Using it with Rails can be somewhat problematic if you want to set up an observer on a field that TinyMCE is managing...

Prototype has a powerful API for accessing and manipulating the Document Object Model, A.K.A the DOM. The following code will let you interact with a simple web form. Suppose we have a form that contains hidden/or locked inputs and they need to be update...

Parsing for links with the Prototype javascript library is easy. Here is the pattern for finding links /(http|https):\/\/[\w\-_]+(\.[\w\-_]+)+([\w\-\.,@?^ =%&amp;:/~\+#]*[\w\-\@?^=%&amp;/~\+#])?/ And to implement it you can loop through your con...

mysql driver is no longer bundled w/ rails. you'll need to install it yourself w/ sudo gem install mysql however, on ubuntu (heron) this won't work. issue these commands first sudo apt-get install libmysql-ruby libmysqlclient-dev if libmysqlclient-dev...

Here are all the commands for setting up your Rails application to server requests over SSL -on Ubuntu, of course. There are great resources and tutorials at these websites. http://www.tc.umn.edu/~brams006/selfsign.html http://www.tc.umn.edu/~brams006/se...