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Select Basename in Postgres SQL
Postgres doesn't have a basename function per se. But it's easy to accomplish. select regexp_replace('', '.+/', '') ; -- Will return logo.png
Written by Sean Behan on 08/16/2018
How to Extract all Images from a Webpage with Ruby
Here is a little ruby snippet that will download all pictures from a webpage. Rather than using XPath, we are going to first reduce the source code to capture everything inside of quotes. Some websites use JSON w/in a script tag to lazy load images an...
Written by Sean Behan on 08/01/2018
How to Get GPS Location Information from Address String with Swift and iOS CLGeocoder
You can use CLGeocoder geocodeAddressString method. It will return an array of CLPlacemark objects that contain gps coords and city, location info. let address = "Burlington, Vermont" CLGeocoder().geocodeAddressString(address, completionHandler...
Written by Sean Behan on 06/11/2018
How to Get GPS Location Information from a Photo or Movie with Swift and UIImagePickerController
This code assumes you're using the UIImagePickerController. If not you will need to get an image url another way. But, If you are using UIImagePickerControllerDelegate then it will supply the asset's url in the `info` dictionary . From the asset's url...
Written by Sean Behan on 06/11/2018
How to Dynamically Call a Method from a String in Swift
You have to subclass NSObject class Car : NSObject { func drive(){ print("Driving..") } } let car : Car = Car() car.perform(NSSelectorFromString("drive"))
Written by Sean Behan on 06/09/2018
How to Check if Your iOS or MacOS App is Connected to the Internet
Is your app connected to the internet? You can use this standalone class to check! There are no dependencies so you can copy/paste it into your project without needing to install another framework. With this class it's as simple as running `Reachabili...
Written by Sean Behan on 06/08/2018
How to Flush or Erase Cache of Your XCode iOS or MacOS Cocoa App
If you're working with an XCode application, either iOS or MacOS, and want to do a completely clean build and delete the cache, it's simple. Execute this command from the command line.. defaults delete Where "your.apps.bundl...
Written by Sean Behan on 06/08/2018
How to Find the Directory Locations Your XCode App Uses
You can add this snippet to your application, say for instance in your `viewDidLoad` function, that will print to the XCode console, the location of your app while it's being developed. // prints the location of asset my-added-file.txt that you've ad...
Written by Sean Behan on 06/06/2018
How to Find Postgres Log File and Postgres Data Directory from PSQL
If you want to find the location of your log file in Postgres, you'll need to hop into a Psql session.. psql dbname Then it's as simple as running.. show data_directory ; Which will output the data directory, in my case.. /Users/sea...
Written by Sean Behan on 05/25/2018
How to Use Python Shutil Make_Archive to Zip Up a Directory Recursively including The Root Folder
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...
Written by Sean Behan on 05/16/2018
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