I have been trying to get the week number in Processing but didn't find how to do it.
How can I get the week number in Processing?
Processing doesn't have a week() function out of the box. But the language that Processing is built on does offer more functionality that you can use for more advanced things that aren't already in Processing.
First off, which mode are you using? Are you using Java mode, or are you using JavaScript mode or P5.js? I'm going to assume you're in Java mode.
If so, keep in mind that since Processing is built on top of Java, anything you can do in Java, you can also do in Processing. So if you can't find the function you're looking for in Processing, chances are it exists somewhere in Java.
I recommend googling something like "Java get current week number" for a ton of results.
Related
Problem statement:
I read in multiple sources/articles that implicits drive up scala compilation time
I want to remove/reduce them to minimum possible to see what compilation time without them will look like (codebase is around 1000 files of various complexity based on scalaz & akka & slick)
I don't really know what kind of static analysis I can perform. Any liks/references to already existing tooling highly appreciated.
It is true that implicits can degrade compilation speed, especially for code that uses them for type-level computations. It is definitely worth it to measure their impact. Unfortunately it can be difficult to track down the culprits. There are tools that can help though:
Run scalac with -Ystatistics:typer to see how many tree nodes are processed during type-checking. E.g. you can check the number of ApplyToImplicitArgs and ApplyImplicitView relative to the total (and maybe compare this to another code base).
There is currently an effort by the Scala Center to improve the status quo hosted at scalacenter/scalac-profiling. It includes an sbt plugin that should be able to give you an idea about implicit search times, but it's still in its infancy (not published yet at the time of writing). I haven't tested it myself but you can still give it a try.
You can also compile with -Xlog-implicits, pipe the output to a file and analyse the logs. It will show a message for each implicit candidate that was considered but failed, complete with source position, search type and reason for the failure. Such failed searches are expensive. You can write a simple script with your favourite scripting language (why not Scala?) to summarize the data and even plot it with some nice graphics.
Aside: How to resolve a specific implicit instance?
Just use reify and good ol' println debugging:
import scala.collection.SortedSet
import scala.reflect.runtime.universe._
println(showCode(reify { SortedSet(1,2,3) }.tree))
// => SortedSet.apply(1, 2, 3)(Ordering.Int)
There is scalac profiling being done by scala center now: https://scalacenter.github.io/scalac-profiling/
Can Pascal run multi procedures at the same time?
If yes, can anyone provide the code?
Since I would like to display a clock on screen (command prompt) but at the same time I want the program also accepts inputs.
I use
write(DateTimeToStr(now))
to display the current time and use a repeat loop to keep flashing it, but the repeat loop makes accepting inputs at the same time not possible as the cursor keeps flashing
Pascal, as a language, has no multiprocessing/multithreading capabilities. So, no.
Now, I guess you're using that antique language for a reason, and probably in a more recent implementation like FreePascal, and that, for example, has a threading implementation. Giving you a full tour of multithreading in general and in FreePascal in detail would definitely be too much for a single answer, so go and search google for "freepascal multithreading".
Start the Free Pascal textmode IDE and you'll see that the timer runs without actually using threading.
Event driven principles and updating the clock when idle goes a long way...
first question I've asked and I'm not sure how to ask it clearly, or if there will be an answer that I want to hear ;)
tl;dr: "I want to import a file into my application at work but I don't know the input format. How can I discover it?"
Forgive any pending wordiness and/or redaction.
In my work I depend on an unsupported (and proprietary) application written in Pascal. I have no experience with pascal (yet...) and naturally have no source code access. It is an excellent (and very secret/NDA sort of deal I think) application that allows us to deal with inventory and financial issues in my employer's organization. It is quite feature-comprehensive, reasonably stable and robust, and kind of foistered (word?) on us by a higher power.
One excellent feature that it has is the ability to load up "schedules" into our corporate system. This feature should be saving us hundreds of hours in data entry.
But it isn't.
The problem is, the schedules we receive are written in a legacy format intended for human eyes. The "new" system can't interpret them.
Our current information (which I have to read and then re-enter into the database by hand) is send in a sort of rich-text flat-file format, which would be easy to parse with the string library of probably any mainstream language.
So I want to write a converter to convert our data into a format that the new software can interpret.
By feeding certain assorted files into the system, I have learned a little bit about what kind of file it expects:
I "import" a zero-byte file. Nothing happens (same as printing a report with no data)
I "import" an XML file that I guess might look like the system expects. It responds with an exception dialog and a stacktrace. Apparently the string <?xml contains illegal characters or something
I "import" a jpeg image -- similar result to #2.
So I think that my target wants a flat-file itself. The file would need to contain a "document number" along with {entries with "incident IDs" and descriptions and numeric values}.
But I don't know this for certain.
Nobody is able to tell me exactly what these files should look like. Someone in the know said that they have seen the feature demonstrated -- somewhere out there is a utility that creates my importable schedules. But for now, the utility is lost and I am on my own.
What methods can I use to figure out the input file format? I know nothing about debugging pascal, but I assume that that is probably my best bet. Or do I have to keep on with brute force until I can afford a million monkey-operated typewriters? Do I have to decompile the target application? I don't know if I can get away with that, let alone read the decompiled source.
My google-fu has failed me.
Has anyone done something like this before or could they point me in the right direction? Are there any guides on this subject?
Thanks in advance.
PS: I am certain that I am not breaking any laws at this point, although I will have to check to find out if decompilation would get me into trouble or not, and that might be outside of my technical competence anyway.
If you have an example file you can try to take a hexdump utility and try to see if there things you can identify. Any additional info that you have (what should in the file) helps with that. Better even, if you know a program that can edit the file, you can use the editor to make minimal changes and then compare the file before and after.
IOW standard tricks of binary file format reverse engineering.
...If you have no existing files whatsoever, then reverse engineering the binary is your only option, and that is not pretty. Decompilation of native binaries is a black art that requires considerable time and skill. Read the various decompilation FAQs on the net.
First and for all, I would try to contact the authors of the program. Source code are options 1,2,3 and you only go with other options if there is really, really, really no hope whatsoever of obtaining source or getting normal support.
I've been using Shark to benchmark a (very large) application and have a set of features I drill down into each time (e.g., focus on one function and remove stacks with particular others to determine the milliseconds for a particular feature on that run). So far, so good.
I'd like to write a script that takes in a bunch of shark session files and outputs the results of these queries for each file: is there a way to programmatically interact with Shark, or perhaps a way to understand the session log format?
Thanks!
I think this will be tricky unless you can reverse-engineer the Shark data files. The only other possibility I can think of is to export the profiles as text and manipulate these (obviously only works if there's enough info in the exported text to do what you need to do.)
I would also suggest asking the question again on Apple's PerfOptimization-dev mailing list (PerfOptimization-dev#lists.apple.com) - there are a number of Apple engineers on that list who can usually come up with good advice when it comes to performance and the Apple CHUD tools etc.
My first question =). I'm writing a video game with a user interface written in JavaFx. The behavior is correct, but I'm having performance problems. I'm trying to figure out how to figure out what is queuing up the refreshes which are slowing down the app.
I've got a relatively complex Scene Graph that represents a hexagonal map. It scales so that you could have 100 or a 1000 hexagons in the map. As the number of hexagons grow the responsiveness of the gui decreases. I've used YourKit (a Java Profiler) to trace these delays to major redraw operations.
I've spent most of the night trying to figure out how to do two things and understand one thing:
1) Cause a CustomNode to print something to the console whenever it is painted. This would help me identify exactly when these paints are being queued.
2) Identify when a CustomNode is put on the repaint queued.
If I answered 1 and 2, I might be able to figure out what it is that is binding all these different nodes together. Is it possible that JavaFX only works through global refreshes (doubtful)?
JavaFX script is a powerful UI language but certain practices will kill performance. Best performance generally boils down to:
keeping the Scene Graph small
keeping use of bind to a minimum (you can look at using triggers instead which are more performant)
This blog post by Jim Weaver expands these points.
I'm not sure as to the specific answers to your questions. If you examine the 1.2.1 docs you might be able to find a point in the Node documentation that you can override and add println statements but I'm not sure it can be done. You could try posting on forums.sun.com
This is a partial post. I expect to expand it after I've done some more work. I wanted to put in what I've done to date so I don't forget.
I realized that I'd need to get my IDE running with a full compliment of the JavaFx 1.2 source. This would allow me to put break points into the core code to figure out what is going on. I decided to do this configuration on Eclipse for remote debugging. I'm developing my FX in Netbeans but am more comfortable with Eclipse so that's what I want to debug in if I can.
To get this info into Eclipse, I first made a project with the Java source that my code uses. I then added external Jars to the project. On my Mac, the Jars I linked to were in /Library/Frameworks/JavaFX.framework/Versions/1.2
Then I went searching for the Source to link to these Jars. Unfortunately, it's not available. I could find some of it in /Library/Frameworks/JavaFX.framework/Versions/1.2/src.zip.
I did some research and found that the only available option left was to install a Java Decompilier. I used this one because it was easy to install into Eclipse 3.4: http colon_ //java dot decompiler _dot free.fr/ (<-- Please forgive the psudo link, I'm limited because I'm new)
This is where I am now. I can navigate into the Core FX classes and believe I'll be able to set break points and begin real analysis. I'll update this post as I progress.
I found a helpful benchmarking tool:
If you run with the JVM arg:
-Djava.util.logging.config.file=/path/to/logging/file/logging.properties
And you've put the following args into the file referenced by that arg:
handlers = java.util.logging.ConsoleHandler
java.util.logging.ConsoleHandler.level = ALL
java.util.logging.ConsoleHandler.formatter = java.util.logging.SimpleFormatter
com.sun.scenario.animation.fps.level = ALL
You'll get console output that includes your frame count per second. For FX 1.2 it wasn't working for me, but it appears to be working for 1.2.1 (which was released Sept. 9, 2009.) I don't have a Netbeans that runs 1.2.1 yet.
You may want to read this article.
http://fxexperience.com/2009/09/performance-improving-insertion-times/
Basically, insertions in to the scenegraph are slow and benefits can be seen by batching up inserts