Just downloaded and installed activeperl 5.16.3.
Trying to add DBD::mysql and found that I cannot change ppm preferences. /Perl/site/lib is unlocked but /Perl/lib is locked.
That means ppm won't put mysql.pm to /Perl/lib/DBD/ but /Perl/site/lib/DBD
Will this work without changing my perl scripts? If not, is there any way to put the module to /Perl/lib (unlock the area (D:\perl\lib)?)
The 'site' directory takes precedence, so it's the correct place to put additional & updated modules.
The other directory is the base install. If you don't muck with it, you won't easily get to a place where you irreparably break your perl.
Related
I'm new to octave, and want to run a few commands on startup automatically every time it opens.
I typed "help startup" and saw "Octave uses the file ".octaverc". I did a bit of searching online at https://www.math.utah.edu/docs/info/octave_4.html, and saw the .octaverc file should be in the following path:
OCTAVE_HOME/lib/octave/VERSION/startup/octaverc
PROBLEM:
In that directory I don't have a startup folder, only "oct" and "site". I do see hidden files, which was my first thought since the file begins with "." character. So I then used Agent Ransack in the directory, and still nothing came up.
QUESTION:
1) Do I have to make the startup folder and octaverc file myself?
2) If so, does one, both or none have to be hidden?
3) Can it be a txt file, or does it have a special extension?
4) Do I just type the commands straight into the file or is there special formatting?
NOTE:
In case I'm going about this the wrong way, there are the operations I'd like to have run on startup:
PS1('>> '), addpath('D:\Users\Me\Desktop'), clc
Thanks ahead of time for the help!!
Possible locations (and their differences) for octaverc files are specified in the documentation.
In short, these are, from more general to specific:
octave-home/share/octave/site/m/startup/octaverc (most generic, for entire system)
octave-home/share/octave/version/m/startup/octaverc (to cover for more than one octave versions installed on the system, possibly requiring different startup scripts)
~/.octaverc (where ~ is unix-speak for a user's home directory -- covering for user-specific startup files)
.octaverc files in any directory, creating specific startup conditions for specific directories
octaverc files are effectively simple script files that are executed from most generic to most specific each time octave starts. Therefore, in the presence of conflicting commands, the more specific file can effectively be used to override the more generic behaviour.
Octave also supports (but does not recommend) the use of the startup.m file, for matlab compatibility.
You might also want to check out pathdef and savepath as well.
As a more general tip, if you ever want to search for a specific keyword from the documentation (e.g. octaverc), you can type this kind of search query in duckduckgo (or google):
octaverc site:https://octave.org/doc/interpreter/
(or just download the documentation as pdf and search the pdf)
Found the solution, the file was in the following path:
OCTAVE_HOME/share/octave/site/m/startup
to find out where OCTAVE_HOME is for you, just type "OCTAVE_HOME" into your Octave command line window.
ANSWERS:
1) You do not have to make a startup octaverc file yourself
2) The file is actually not hidden, so it should be easy to find given you're looking in the right place.
3) The file doesn't have an extension. It's just octaverc.
4) Under the last line of the existing file, you can just append commands as you would type them at the Octave command line window.
the last(7.3.0) octave version placed HERE:/ does not find the THERE:/openEMS/matlab directory even it is already loaded with octaverc or addpath. It keeps looking into the work dir where openEMS is not placed and does not recognize, for instance, the 'physical_constants.m' file.
I'm trying to cross compile GNU grep for Windows from Fedora, using their mingw64 cross compilers. The process is really easy, with one exception. By default, it appears that mingw64 doesn't expand wildcards on the command line, so that grep FOO * gives "Invalid argument: *" rather than searching all files in the current directory.
After a bit of research, I found that there is an external symbol, _dowildcard in the mingw64 CRT, that will trigger wildcard expansion if set to -1. But I've found no useful documentation on how to set this (maybe because it's considered obvious ;-)).
I could modify the source code to set the variable, but I'd much prefer to not have to modify the source if at all possible. (I want to set up an automated build, and applying code patches just adds complexity that I'd like to avoid). Is there any way to set _dowildcard from the configure or make command line? I seem to remember older versions of mingw having a setargv.obj file that could be linked into your project to enable wildcard expansion - is there anything similar for mingw64?
Answer from #ssbssa above:
There is a file CRT_glob.o file supplied with the mingw packages, in /usr/x86_64-w64-mingw32/sys-root/mingw/lib/CRT_glob.o (or the corresponding location for 32-bit) that you can link with your executable to activate command line globbing.
You have to specify the file by full pathname for the linker to find it.
I have installed MediaWiki and I would like to use the {{listen}} template as one can do on Wikipedia.
I tried copying the {{Template:Listen}} and {{Module:Listen}} pages onto my wiki, but it doesn't give any result as the pages are interpreted as text (while {{Module:Listen}} is code (Lua?)).
What should I do to get this to work?
You need to install the extension Scribunto, to be able to use Lua. In recent MW versions, the extensions is already bundled, and all you have to do is
require_once "$IP/extensions/Scribunto/Scribunto.php";
Otherwise download it and put it in your extensions directory first.
If that doesn't work, you might have to use another version of Lua than the one bundled with the Scribuntu extension (this will depend on your server). See instructions on http://www.mediawiki.org/wiki/Extension:Scribunto on how to do this. In short: Install Lua on your server, set $wgScribuntoEngineConf['luastandalone']['luaPath'] to the path of your Lua binaries, and add $wgScribuntoDefaultEngine = 'luastandalone'; after the require_once line.
I am writing a WIX installer and I have a following requirement:
During installation, I need to pass an absolute path to a file (lets call it A) included in my installer to a COM component, which already exists on the hard drive and is a part of another program. I have already written an appropriate Custom Action which expects a path to the file A. I don't want to include A as a file installed in the Program Files folder and removed during the uninstallation process. Instead, I would like to put A only temporary on the hard drive, call my Custom Action which will cause the COM component to use the content of A, and then remove A from disk. Is there an easy way to accomplish this goal?
I have tried to utilize the Binary Table and store A there, however I don't know how to reference A using absolute path. I know I could put A outside of MSI file but I would like to keep every file installer needs in a single MSI.
Any help would be appreciated.
Deleting a file that MSI installed means that MSI will consider it "broken" and try to auto-repair it if called on to do so. That happens automatically in several cases (e.g., advertised shortcuts and COM registration) so I'd recommend against it. Leave the file there instead -- it's done its job and there's no harm in leaving it there.
I would take this approach.
Install the file "A" into any directory. Run your custom action needed to update the COM component. Then run another custom action or modify the currently written one to remove the file after it is no longer in use. This would leave no trace of the file "A" and if you schedule the custom action to only run during the install you won't have to worry about it on uninstall.
Is it possible to browse the source code of OpenJDK online, just like I can do with SourceForge's projects? I never used Mercury before, so I felt confused.
(Note: I don't want to download the source. I just want to browse it online, to see how some methods are implemented.)
OpenJDK is now on GitHub: https://github.com/openjdk/jdk
It is a large project, but you will find the implementations of the core classes under jdk/src/java.base/share/classes.
For instance you can find the implementation of java.util.List here.
If you need to browse older versions, you still need to use the old Mercurial interface.
The Mercurial interface there is quite confusing if you are not used to it, and since this is a large project, it can be hard to find what you are looking for.
Here is an example:
To find the JDK6 implementation java.util.List, select jdk6, jdk, select browse. Then browse to src/share/classes/java/util/List.java.
You should end up at http://hg.openjdk.java.net/jdk6/jdk6/jdk/file/tip/src/share/classes/java/util/List.java
The latest JDK 8 OpenJDK Java Class Library source code can be found here: http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/file/tip/src/share/classes/
Here is the basic step to get latest or any released version of Openjdk 8 (or any existing java version) source code, and use them in Eclipse.
Steps:
[browse source]
Open url for jdk, e.g http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/
click tags
choose proper tag, e.g jdk8u73-b02
then click browse,
then browse into folder src/share/classes,
[download source]
then click one of bz2 / zip / gz, to download source in relevant compressed format, (e.g for jdk8u73-b02 in zip format, the url will be: http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/archive/2ab13901d6f1.zip/src/share/classes/)
[use in eclipse]
uncompress it,
zip the folder "classes/", make "classes/" as the root dir of .zip file, (e.g first cd jdk-2ab13901d6f1/src/share/, then zip -r openjdk_8u73_b2_src.zip classes/)
move the created zip file to proper location, it will stay there for a while, (e.g mv openjdk_8u73_b2_src.zip /media/Eric/software/java/jdk/openjdk/openjdk8u73-b02/source/)
in eclipse, specify source file for jars of installed jre, could specify the source attachment for each jar of installed jre respectively, the most common jar is probably rt.jar,
optionally, might need refresh project to make it totally take effect, not sure is that necessary,
test it: in eclipse, ctrl + shift + t, then input Cancellable, select the sun.nio.fs.Cancellable of corresponding installed jre,
if the source code is available, then it's good, because this source is not available in jdk_home/src.zip, it must be from the additional openjdk source,
switch source back: could switch back to use "jdk_home/src.zip", if don't want to use the external openjdk source,
ok
Here's a way to browse the repositories and look at just the bits you want.
http://hg.openjdk.java.net/
Is that what you are asking?
Append a "/file" to the root URLs to view the browser like this:
http://hg.openjdk.java.net/jdk7/jdk7/jdk/file/
http://hg.openjdk.java.net/jdk7/jdk7/hotspot/file
Grepcode.com is great for similar things - not only OpenJDK sources, with searching in classes/methods and links between classes directly in highlighted code:
http://grepcode.com/file/repository.grepcode.com/java/root/jdk/openjdk/8-b132/java/net/Socket.java
As mentioned in the other answers, the source code repository is at https://hg.openjdk.java.net
However, the OpenJDK team mirrors some of the projects on GitHub: https://github.com/openjdk
Including the latest Java version project (https://hg.openjdk.java.net/jdk/jdk): https://github.com/openjdk/jdk
Surely http://hg.openjdk.java.net is one good option. The other equally good source is zGrepCode https://zgrepcode.com/java/openjdk/ . It has both Open JDK and Oracle java versions.