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So I am trying to convert a String array into a character array and I keep running into this error: Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: 16 . I even tried to increase my array size but that keeps happening.

The string that is in the file which is stored in the array is exactly 16 characters long. So that maybe the error?

"keyChar[i] += ht[j].charAt(i);" this line is where the error is being thrown. UPDATED CODE:

Now its working but only iterating through the 8 string and 128 characters.

I am developing an LTI Tool Provider in Python and have had no problems getting any aspects of LTI 1.x basic launch working or the Content Item specification. I have hit a huge brick wall though trying to use the LTI 2 registration mechanism.

Whenever I run my code on some Tool Consumers all I get is a 400 error when I post my tool proxy to the tool proxy endpoint listed in the tool consumer profile.

I have tried this on:

• http://lti.tools/test/tc.php (Registers Succesfully)
• Moodle 3.2 running on AWS (400 Bad Request)
• Moodle 3.3 runnong on Localhost (Registers Succesfully)
• Canvas (400 Bad Request) {"error":"Invalid Capabilities"}

Unfortunately nothing is giving me any idea of what is bad about the request. I am 90% certain that it is the JSON or something in the headers. I am pretty sure it is not the oAuth (Thanks to Comments below and the fact that it works in 2 of the 4 tested environments)

Supposedly Moodle gives you some output somewhere, but I have looked everywhere and haven't found it. I turned on the development mode from the Site Administrator Menu and followed several directions on how to make sure that errors are being logged in PHP and I can't find anything anywhere.

Originally I couldn't get this to work anywhere, but I was able to hook up xdebug to the local Moodle 3.3 instance and that's how I was finally able to get that working.

Here is the Tool Consumer Profile from Canvas:

So, this is a particularly puzzling problem for me. I'm open to using whatever I must, but I typically only write simple batch files.

I have a huge research project at the hospital where I work, and the data I'm working with is presented to me with a 4 digit subject identifier followed by a timestamp, as seen in this example:

6443_20170419_141200416
6443_20170419_141200447
6443_20170419_141200500
6476_20170419_141200537
6476_20170419_141201112
etc.

I have literally thousands of these folders, and in each of them is between 1 and 3 files with very long file names - the only commonality is the .DCM extension.

What I'd like to do is have a script that will extract the first 4 characters of the folder name, create a new directory with that 4 character name, and then copy any files located within folders with the matching prefix into the newly created folder.

For example, let's say the folders which all start with 6443 have several .DCM files in them. I want to create a new folder named 6443 (in a different location that the then current directory, to avoid accidental deletion), and then move all of the .DCM files from each directory into the new folder.

I have a .TXT file which contains all of the subject ID #'s that I've been using for various other scripted tasks, using FOR /F to walk this file, if that gives anyone an idea for a solution.

This once is really picklin' my noggin. Help!!!

----- ADDITIONAL INFO ----- I've been making progress, but it's still not right. I'm using the script as shown below, but it's moving ALL of the files in each of the folders to each of the newly created folders, instead of sorting them by 4 digit prefix.

Need a bit of guidance on some homework for college. So if you could give me pointers rather than the actual solution that would be much appreciated.

Been tasked to modify an existing program so that when the mouse hovers over the dark squares of a draughts board, only the dark squares are changed to a different colour. When the mouse exits the dark square, it goes back to its original colour.

I have included the two classes I feel are important to solving this task.

Thankyou for any help received. Been scratching my noggin' on this one for a while now. Part of the task is to only edit the Board class and no others.