utilities

I'm very new to OOP and am trying my hardest to keep things strictly class based, while using good coding principles. I'm a fair ways into my project now and I have a lot of general use methods I want to put into an utilities class. Is there a best way to create a utilities class? public class Utilities { int test; public Utilities() { } public int sum(int number1, int number2) { test = number1 + number2; } return test; } After creating this Utilities class, do I just create an Utilities object, and run the methods of my choosing? Do I have this Utilities class idea correct? You should make it

I'm working on a mac, with some fairly old files. Different files were created by different programs, so some of them end with \r (mac) and some with \n (unix). I want to be able to run commands like diff, grep, etc on these files, but the ones that have \r are treated as one giant line. does anyone know of a version of diff, grep, etc that will work correctly with all new-lines? ETA: I'd also like them to be unix utilities so I can use them in scripts, emacs, etc... As Jay said, Diff'nPatch seems what you are looking for. Alternatively you can convert all your '\r' line endings in '\n' in a

If I want to cut a list of text using a string as a delimiter, is that possible? For example I have a directory where a list of shell scripts call same perl script say abc.pl So when I do $grep abc.pl * in that directory, it gives me following results xyz.sh: abc.pl 1 2 xyz2.sh: abc.pl 2 mno.sh: abc.pl 3 pqr.sh: abc.pl 4 5 I basically want all the output after "abc.pl" (to check what range arguments are being passed to the perl right now) When I tried $grep abc.pl * | cut -d'abc.pl' -f2 OR $grep abc.pl * | cut -d'abc\.pl' -f2 its giving me cut: invalid delimiter When I read man for cut it

Suppose I have a list of things (numbers, to keep things simple here) and I have a function I want to use to sort them by, using SortBy. For example, the following sorts a list of numbers by last digit: SortBy[{301, 201}, Mod[#,10]&] And notice how two of (ie, all of) those numbers have the same last digit. So it doesn't matter which order we return them in. In this case Mathematica returns them in the opposite order. How can I ensure that all ties are broken in favor of how the items were ordered in the original list? (I know it's kind of trivial but I feel like this comes up from time to

I know there has been previous talk on here about screencasting tools/apps, however I thought I would be more specific in what I am after in the hope that it can help me and others :) I am looking at trialling some screencasts on my blog . There are numerous reasons for this (hopefully being more helpful to readers, improving my elocution etc.) So, do you know of any good FREE screencasting tools & utilities to get started? I am not interested in apps that cost at this time because I do not want to shell out until I am more comfortable with the medium! Also, if you have posted screencasts

Linux supports sending an arbitrary Posix-Signal such as SIGINT or SIGTERM to a process using the kill -Command. While SIGINT and SIGTERM are just boring old ways to end a process in a friendly or not-so-friendly kind of way, SIGQUIT is meant to trigger a core dump. This can be used to trigger a running Java VM to print out a thread dump, including the stacktraces of all running threads -- neat! After printing the debugging info, the Java VM will continue doing whatever it was doing before; in fact the thread dump just happens in another spawned thread of maximum priority. (You can try this

I prefer to jot down UML-diagrams on paper and then implement them using Java. It would be nice to have a utility which could create UML-diagrams for me which I may share on-line and include in the digital documentation. In other words: I want to create UML diagrams from Java source code. The utility must be able to: Run in Linux. Handle Generics, i.e show List<Foo> correctly in parameters and return type. Show class inheritance and interface implementations. It's nice if the utility is able to: Run in Windows and Mac OS X. Display enums in some nice manner. Generate output in a diagram format