Rideau | Rideau is a drawer UI | 3D Animation library

Take a closer look at the documentation of uiop:launch-program and uiop:run-program, especially the options for the :input and :output keys.

You can call launch-program with :input :stream. Launch-program returns a process info object that contains the stream connected to that program's standard input behind the accessor process-info-input, so you can print to that.

If you have a different program that produces output that should go into that input stream, you have several options:

• create a temporary file, then read it and print it to the second program's input stream (that seems to be your current approach)
• use run-program with :output :string for the first call, then use launch-program with :input :stream for the second and write the output of the first to that stream
• use launch-program also for the first call, in this case with :output :stream, then read from that output and print it to the second program's input

You can either read everything first, then write everything, or you can do buffered reading and writing, which might be interesting for long running processes.

Instead of this in-process buffering, you could also use a fifo (named pipe) from your OS.

The issue looks to be that the map object is not initialized yet when you create a new MarkerClusterer. In the log, you can see that the markers are parsed before the map is created. You could move that code into the loadJSON() function to ensure that the map is created before adding the markers. Here's a simple sample JSBin with the code moved into that function

The code:

MarkerClusterer doesn't change the markers. Your code is using the default icon for the markers you are adding to the MarkerClusterer. Your createMarker function (from your fiddle, not your code snippet), doesn't set the icon property of the marker, which means it creates a marker with the default icon:

You can create a dictionary from your df2 and then map df1 to create the new column. If all of your entries in BSI are the same format as provided, then it's simple to just select the first 2 letters. If if it needs to be more complicated, like all things before the first hyphen, then you can use regex.

Here's some test data

I was going about the validation all wrong. Thanks to @max and @TarynEast for the push in the right direction.