interactive

Bash commands are available from an interactive tclsh session. E.g. in a tclsh session you can have % ls instead of $ exec ls However, you cant have a tcl script which calls bash commands directly (i.e. without exec ). How can I make tclsh to recognize bash commands while interpreting tcl script files, just like it does in an interactive session? I guess there is some tcl package (or something like that), which is being loaded automatically while launching an interactive session to support direct calls of bash commans. How can I load it manually in tcl script files? What's going on here is

I'm currently generating 3D graphs in R using the persp -command. To change the viewpoint one has to set the parameters theta and phi . To evaluate (a good viewpoint on) the graph, one has to try lots of combinations for these parameters. I was wondering if one can define an interactive output device that allows to rotate the graph using the mouse. It would be also nice if this device gives the current values for theta and phi . Is there such a device/package? See the rgl package: http://cran.r-project.org/web/packages/rgl/index.html It won't report the theta and phi values you need, IIRC

I was wondering why is there a different rule for blank lines in Python between interactive prompt and when the program is run from shell as an executable. Since blank lines are ignored, I enjoy using them abundantly. However, in the interactive prompt, a blank line is used to terminate a loop. Thus, I keep running into indentation errors when I paste a chunk of code into the interactive prompt as I would have blank lines throughout my loops. Consequently, this makes the interactive debugging/development process somewhat tedious. Putting a # instead of blank line helps, but I like my blank

I'm pretty new to Haskell, so I'm looking for a simple-ish way to detect keypresses, rather than using getLine . If anyone knows any libraries, or some trick to doing this, it would be great! And if there is a better place to ask this, please direct me there, I'd appreciate it. If you don't want blocking you can use hReady to detect whether a key has been pressed yet. This is useful for games where you want the program to run and pick up a key press whenever it has happened without pausing the game. Here's a convenience function I use for this: ifReadyDo :: Handle -> IO a -> IO (Maybe a)

I use a couple of software packages (like gitlab) that you install by cloning from their git repo. They typically come with some config.example (under version control), which you copy to your own config file (not under version control or even ignored in .gitignore ) and adapt to your needs. When the upstream package is updated and for example changes the config file options that will obviously only be reflected in config.example . Is there a chain of git commands that i'm missing that can help me compare the changes of config.example to the new one in upstream/HEAD and maybe even merge them

I'm trying to rebase a commit. However, any time I run git rebase -i f83eff3ffc8 , for example, a MacVim window opens, that's empty (there is no information in the file). Then once I write and close the file (even though it's empty), I get a Successfully rebased and updated refs/heads/clicktocall-hotfix message. The file name is .git/rebase-merge/git-rebase-todo . I also tried running it with sudo but this didn't make a difference. What could be the problem? I've never successfully completed a rebase. Kevin Burke I was using Macvim and needed to run mvim with the -f option, as documented here:

How can I define an emacs command X that does something and then calls another emacs command Y and also copying the interactive interface of the command Y too? I want to define an altenative version of query-replace with temporarilly toggled value of case-fold-search: (defun alt-query-replace (a b c d e) (interactive) (let ((case-fold-search (not case-fold-search)) (query-replace a b c d e))) This doesn't work. When I call alt-query-replace, it says "wrong number of arguments". I want the interactive interface of alt-query-replace to be the same as query-replace. Do I need to inspect the