trj | computer using a trojan horse | Hacking library

As some comments said, it's probably safer to open up the input file and write output to a separate file.

Using a with block is handy, because you don't need to handle closing a file; your file is automatically closed at the end of the block.

I'd do something like this:

You only have one copy of the elements in coords, and modify those elements with your run() function. This is one reason Julia has a convention that argument-mutating functions be named with a !, as run!(coords, vels), to remind you of this. I would suggest you change run() to modify a copy of its argument and return it, but if you don't want to do that you could do:

This is not a full answer as it's just what came to mind and is completely untested.

First thing is to search SO for ways to create a multi-column table, there are plenty of answers already so I won't explain in detail here. They usually involve adding RowNumber to each row which you can then use to calculate a matrix row and matrix column number, the column number can be used in a matrix as the column group. (e.g. if the row limit is 6 and the row number is 14, that will have a final row number of 2 (14 mod 6 = 2) and a column number of 3 as Floor(14/6)+1 = 3.

Next, create dataset that just gets the highest row count from each of your tables. Something like

I'd guess something like this would work:

You should try to query the error of the build in such cases. Another thing you can do in similar, kernel code errors is that you can use offline compilers. Every OpenCL implementer has offline compiler.

You can find Intel's OpenCL offline compiler here: https://software.intel.com/en-us/articles/programming-with-the-intel-sdk-for-opencl-applications-development-tools

AMD has a tool called CodeXL, in which you can also do offline compilation to see if your kernel code compiles.

Here is the ARM OpenCL offline compiler: https://developer.arm.com/products/software-development-tools/graphics-development-tools/mali-offline-compiler/downloads

Intel's support is up to OpenCL 2.1 while ARM supports up until 1.1. So, you can choose any of them to compile your kernel code to find out bugs or errors easily.

The problem in your kernel is the following line:

You can test with ls your_pattern. I think you were trying to find all files with 1 or 2 digits

I believe you want to change your glob expression to cfdT100-{0..19}.trj instead.