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• Are small amounts of functional programming understandable by non-FP people?

  - by kd35a

  Case: I'm working at a company, writing an application in Python that is handling a lot of data in arrays. I'm the only developer of this program at the moment, but it will probably be used/modified/extended in the future (1-3 years) by some other programmer, at this moment unknown to me. I will probably not be there directly to help then, but maybe give some support via email if I have time for it. So, as a developer who has learned functional programming (Haskell), I tend to solve, for example, filtering like this: filtered = filter(lambda item: included(item.time, dur), measures) The rest of the code is OO, it's just some small cases where I want to solve it like this, because it is much simpler and more beautiful according to me. Question: Is it OK today to write code like this? How does a developer that hasn't written/learned FP react to code like this? Is it readable? Modifiable? Should I write documentation like explaining to a child what the line does? # Filter out the items from measures for which included(item.time, dur) != True I have asked my boss, and he just says "FP is black magic, but if it works and is the most efficient solution, then it's OK to use it." What is your opinion on this? As a non-FP programmer, how do you react to the code? Is the code "googable" so you can understand what it does? I would love feedback on this :) Edit: I marked phant0m's post as answer, because he gives good advice on how to write the code in a more readable way, and still keep the advantages. But I would also like to recommend superM's post because of his viewpoint as a non-FP programmer.

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• How can I redirect all files in a directory that doesn't conform to a certain filename structure?

  - by user18842

  I have a website where a previous developer had updated several webpages. The issue is that the developer had made each new webpage with new filenames, and deleted the old filenames. I've worked with .htaccess redirects for a few months now, and have some understanding of the usage, however, I am stumped with this task. The old pages were named like so: www.domain.tld/subdir/file.html The new pages are named: www.domain.tld/subdir/file-new-name.html The first word of all new files is the exact name of the old file, and all new files have the same last 2 words. www.domain.tld/subdir/file1-new-name.html www.domain.tld/subdir/file2-new-name.html www.domain.tld/subdir/file3-new-name.html ect. We also need to be able to access the url: www.domain.tld/subdir/ The new files have been indexed by google (the old urls cause 404s, and need redirected to the new so that google will be friendly), and the client wants to keep the new filenames as they are more descriptive. I've attempted to redirect it in many different ways without success, but I'll show the one that stumps me the most RewriteBase / RewriteCond %{THE_REQUEST} !^subdir/.*\-new\-name\.html RewriteCond %{THE_REQUEST} !^subdir/$ RewriteRule ^subdir/(.*)\.html$ http://www.domain.tld/subdir/$1\-new\-name\.html [R=301,NC] When visiting www.domain.tld/subdir/file1.html in the browser, this causes a 403 Forbidden error with a url like so: www.domain.tld/subdir/file1-new-name-new-name-new-name-new-name-new-name-new-name-new-name-new-name-new-name-new-name-new-name-new-name-new-name.html I'm certain it's probably something simple that I'm overlooking, can someone please help me get a proper redirect? Thanks so much in advance! EDIT I've also got all the old filenames saved on a separate document in case I need them set up like the following example: (file(1|2|3|4|5)|page(1|2|3|4|5)|a(l(l|lowed|ter)|ccept)

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• Why do Google search results include pages disallowed in robots.txt?

  - by Ilmari Karonen

  I have some pages on my site that I want to keep search engines away from, so I disallowed them in my robots.txt file like this: User-Agent: * Disallow: /email Yet I recently noticed that Google still sometimes returns links to those pages in their search results. Why does this happen, and how can I stop it? Background: Several years ago, I made a simple web site for a club a relative of mine was involved in. They wanted to have e-mail links on their pages, so, to try and keep those e-mail addresses from ending up on too many spam lists, instead of using direct mailto: links I made those links point to a simple redirector / address harvester trap script running on my own site. This script would return either a 301 redirect to the actual mailto: URL, or, if it detected a suspicious access pattern, a page containing lots of random fake e-mail addresses and links to more such pages. To keep legitimate search bots away from the trap, I set up the robots.txt rule shown above, disallowing the entire space of both legit redirector links and trap pages. Just recently, however, one of the people in the club searched Google for their own name and was quite surprised when one of the results on the first page was a link to the redirector script, with a title consisting of their e-mail address followed by my name. Of course, they immediately e-mailed me and wanted to know how to get their address out of Google's index. I was quite surprised too, since I had no idea that Google would index such URLs at all, seemingly in violation of my robots.txt rule. I did manage to submit a removal request to Google, and it seems to have worked, but I'd like to know why and how Google is circumventing my robots.txt like that and how to make sure that none of the disallowed pages will show up in their search results. Ps. I actually found out a possible explanation and solution, which I'll post below, while preparing this question, but I thought I'd ask it anyway in case someone else might have the same problem. Please do feel free to post your own answers. I'd also be interested in knowing if other search engines do this too, and whether the same solutions work for them also.

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• Can Grub be configured to remember the last OS you booted into?

  - by Matthew

  I typically have 2-3 OSes in my boot menu: Ubuntu 10.04 Windows 7 [Sometimes, a third option, such as Ubuntu 10.04 Netbook] If I am in an OS other than the default choice (Windows 7 in this case), and I reboot, Grub boots into Ubuntu 10.04. This shouldn't happen--when I reboot in Windows 7, I want to stay in Windows 7. Is there any way to configure Grub to remember my last choice, and boot into that? Alternatively, it would be even better if Grub only did this when I rebooted (not when I first turn the computer on). I realize this may not be possible, so I'd be happy with simple last-choice-remembering.

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• Change default code page of Windows console to UTF-8

  - by Regent

  Currently I'm running Windows 7 x64 and usually I want all console tools to work with UTF-8 rather than with default code page 850. Running chcp 65001 in the command prompt prior to use of any tools helps but is there any way to set is as default code page? Update: Changing HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Nls\CodePage\OEMCP value to 65001 appear to make the system unable to boot in my case. Proposed change of HKEY_LOCAL_MACHINE\Software\Microsoft\Command Processor\Autorun to @chcp 65001>nul served just well for my purpose. (thanks to Ole_Brun)

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• Software for defining rules for folder permissions and monitoring deviations

  - by Kjensen

  Let's say a company has a large number of users, and each user has a home area. On each share used for home area folders, I would like to define some rules saying who is supposed to have which permissions on the folder. Then I would like to audit automatically, that this is actually the case and get some sort of report on deviations. So a rule for \MegaServer\Home01 could be defined something like: Domain Admins - Full Control Backup Agent - Read [Home folder owner] - Full Control I am talking about Windows platform and Windows servers, although I think it would most likely also work for *nix machines that expose Windows shares. Does software like this exist? I could roll my own basic version, but if something already exists, that is usually a better option. I am aware of tools to make displaying permissions easier (AccessEnum, DumpSec), but that is not what I am looking for.

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• Can observer pattern be represented by cars and traffic lights?

  - by eeerahul

  I wanted to verify with all of you, if I have a correct Observer Pattern analogy. The scenario is as follows: Consider, at a junction, there is a traffic signal, having red, yellow and green lights respectively. There are vehicles facing the traffic signal post. When it shows red, the vehicles stop, when it shows green, the vehicles move on. In case, it is yellow, the driver must decide whether to go or to stop, depending on whether he/she has crossed the stop line or not. At the same time, there are vehicles that do not care about the signal. They would do as they like. The similarities are that, the Traffic Signal happens to be the subject, notifying its states by glowing the appropriate lights. Those looking at it and following the signal are the ones subscribed to it, and behave according to the state of the subject. Those who do not care about it, are sort-of un-subscribed from the traffic signal. Please tell me, if you think this is a correct analogy or not?

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• OS X: How to create a user account with access to the applications that she has installed only.

  - by pmurillo

  Till now, I've been the sole and proud owner of an iMac. I've always logged in as an administrator and I've also installed a bunch of software following the standard procedure of dragging and dropping it into the Applications folder. This is about to change, as sharing it with a friend makes a lot of sense now that I only have time to use the computer in the mornings, and she can only use it at nights. I thought this was going to be really easy: Just create a user account for her and that's all, I thought. Unfortunately, this is not the case. When she logins into the computer using her username and password, she has access to the same applications I've installed. Even the same applications that I setup to automatically start when I login start for her when she does. How can I setup a user that has only access to the applications that she has installed, but none of the ones installed by other users? Many thanks

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• How do I know when my on-board ethernet is dead? (Realtek 8112L LAN controller w/ AI NET2 )

  - by Usagi

  So I have an ASUS P7P55D-E Pro motherboard. It has an on-board Realtek 8112L LAN controller w/ AI NET2. I suspect that my LAN controller is dead but I don't really know for sure. This is what I know thus far: Everything was working, I have a triple booted system and ethernet was functional under Linux, Win7, and OSX. My ethernet is no longer functional under all three of the operating systems. I was experiencing random momentary internet outages before everything finally went dark. I don't know much about the AI NET BIOS tool but I believe it just checks for ethernet problems before you boot into an operating system. In any case, it doesn't find a connection upon boot. I've checked the connection on a couple of other machines and everything worked fine. I think I already know the answer to my question, but are there any other possible explanations, or is it dead?

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• What language available on commodity web hosts would suit a C# developer? [closed]

  - by billpg

  Recognising its ubiquity on commodity web hosting services, I tried developing in PHP a few years ago. I really didn't like it, later deciding that life was too short for PHP. (In brief, having to put $ on variable names; mis-spelt variable names become new variables; converting non-numeric strings to integers without complaint; the need for an "and this time I mean it" comparison operator.) In my ideal world, commodity web hosts would all support C#/ASP.NET, my preferred web-development language and framework, but this is not my ideal world. Even Mono has barely made a dent on Linux based hosts. However, last time I moaned about PHP's ubiquity, someone followed up that this was no longer the case, and that many other languages are now commonly usable on web hosts too. What programming language; a. Would suit a developer who prefers C#. b. Is available to run on many web hosts.

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• If you favor "T *var", do you ever write "T*"?

  - by Roger Pate

  Thinking about where we place our asterisks; how do those that prefer to keep the "pointerness" away from the type and with the identifier (int *i) write code when the identifier is missing? void f(int*); // 1 void f(int *); // 2 The former seems much more common, no matter what your preference when with the identifier. Is this a special case? What makes it an exception? However, the first still isn't universal, because I have seen the latter style. Besides consistency along the lines of "there's always a space with the identifier, so we have one without", are there any other reasons to prefer it? What about casts or array and function types? How would you re-write these: (void*)var /*or*/ (void *)var int[3] /*or*/ int [3] // more relevant in C++ than C: Example<int[3]> void(int) /*or*/ void (int) // more relevant in C++ than C: std::function<void(int)> The latter two would rarely, if ever, be used in C, but are seen with C++ templates.

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• Unable to do Port Forwarding in Virtual Box

  - by dewbot

  I'm using Mac OS X 10.6. I have installed Virtual Box 4.1.0 in it. My Guest OS is Ubuntu Server 11.04. I have added a rule in Port Forwarding in Virtual Box - "guestssh" TCP 127.0.1.1 8080 127.0.0.1 1337 Inside Guest OS I'm running nodejs server. Code is nothing but simple helloworld code found on their site http://nodejs.org/. In short I'm running server on 127.0.0.1 on 1337 Port. Now according to rule I have given, from Host Machine all the requests for 127.0.1.1:8080 should be forwarded to 127.0.0.1:1337 of Guest OS. From Host I'm doing curl http://127.0.1.1:8080 and I'm getting curl: (7) couldn't connect to host Is there something am I doing wrong? Note- Don't give me suggestion to do ssh n all. As my ISP does not provide Internal LAN so its not possible in my case. All I can do it Port Forwarding.

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• Finite Numbers and ExplorerCanvas

  - by PhubarBaz

  I was working on my online mathematical graphing application, CloudGraph, and trying to make it work in IE. The app uses the HTML5 canvas element to draw graphs. Since IE doesn't support canvas yet I use ExplorerCanvas to provide that support for IE. However, it seems that when using excanvas, if you try to moveTo or drawTo a point that is not finite it loses it's mind and stops drawing anything else after that. I had no such problems in Firefox or Chrome so it took me awhile to figure out what was going on. Next I discovered that I needed a way to check if a variable was NaN or Inifinity or any other non-finite value so I could avoid calling moveTo() in that case. I started writing a long if statement, then I thought there has to be a better way. Sure enough there was. There just happens to be an isFinite() function built into Javascript just for this purpose. Who knew! It works great. Another difference I discovered with excanvas is that you must specify a starting point using a moveTo() when beginning a drawing path. Again, Chrome and Firefox are a lot more forgiving in this area so it took me a while to figure out why my lines weren't drawing. But, all is happy now and I'm a little wiser to the ways of the canvas.

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• Mailman aggregate mailing lists

  - by s1nny

  Using CENTOS 5.10, WHM, CpanelX I'm setting up mailing lists for my company (microsoft exchange costs too much for the number of users we have). So I've got a few mailing lists set up right now @Naples, @Cayman, @ACK, @Managers etc which are all set up and working nicely. Now I need to create an aggregate list, @Stores, which sends to other lists, in this case @Naples, @Cayman and @ACK and leaving out @Managers. I keep getting authorization requests from each store list when I send to @Stores but if I send to each store list individually its fine. I've got them all set up to "accept non member postings for which no explicit action is defined", as well as set "accept_these_nonmembers" to ^.*

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• Dell XPS M1330 - power cable pulled by accident and now it won't turn on

  - by jim

  I have a similar problem to what has been posted on this site about when I plug in my Laptop adapter the green light comes on as expected; but, when I plug it into the laptop it goes out. In my case, I know it's not the adapter because I have 2 and they both experience the same issue. I'm quite certain the problem is a short in the laptop. I was using the laptop today and the power cord was pulled out by accident and now i'm into this predicament. How or what do I check on the laptop to isolate the problem? Thanks!

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• Win Server 2008 R2 SP1 Repair Disk

  - by Horst Walter

  Is there nothing like "creating a repair disk" for Win Server 2008 R2 SP1. Or am I just missing it? Under Win7 I do just enter "Repair" and it finds "create a repair disk". Sorry - but I am not a professional Admin. Just using the server for my development environment. If there is no repair disk, is there something similar or something I should create in case I do have a system failure? Sure, a full backup is done, but anything else?

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• Database Consolidation Slides

  - by B R Clouse

  In case you missed us in the Demogrounds at Oracle OpenWorld-- or if you were there and would like to take another look -- here are the slides we were presenting last week:  Database Consolidation for Private Database Clouds. I'm thinking to add a voice-over ... once my voice recovers from four days of non-stop discussions, meetings, speaking sessions etc.  A few of the questions we answered frequently included: Q: Is it possible to deploy an Oracle Database Cloud today with Oracle's current technologies and products? A: Absolutely!  Oracle has been developing technologies for several years that support the key features of a cloud environment.  Oracle Database 11g is an ideal platform for database clouds. Q: Are Oracle Engineered Systems required for Oracle Database Clouds? A: Oracle Database Clouds run best on our Engineered Systems, but can also be deployed on any platform that supports the database, as many customers are doing today. If you have questions, feel free to post them here and we'll start a dialog.

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• Share files - Ubuntu 12.4 and Windows 7 - one network - password not accepted

  - by gotqn

  I have three machines - two with windows 7 and one with Ubuntu 12.4 version. There are in the same network connected by modem. The two machines shares file with no problem, but they can not see the machine with Ubuntu. On the other hand, I am able to see the share files of the windows machines from the Ubuntu's Network. When I select a folder, it wants the network password - I changed it several times in order to be sure that I am entering the correct one but in every case it says that the password is wrong. I have read some topics about files sharing between Linux and windows in which it is said that I should use samba, but is there a more easy way to do this, using the build it options?

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• Working with Google Webmaster Tools

  - by com

  My first question is about Crawl errors in Google Webmaster Tools. Crawl errors is devided into few sections. One of them is HTTP. I assume that all broken links in HTTP was somehow found by crawler, this is not the links from sitemap. If this was found by scanning all sitemap pages for links, why it doesn't mention what was the source page, like in sitemap section with column Linked From. And what the meaning of Linked From, I thought if the name of section is sitemap, therefore all URLs should be taken from sitemap, so why there is Linked From? The second question, what is the best way to trreat searching on the site. How come the searching result page are getting indexed? Because of the fact that all searching result page are getting indexed, I have to many page in Linked From. What's the right practice? Question three: In order to improve response time in WMT, can I redirect all crawler's requests to designated free web server? Is this good practice? Question four: How should I treat Google Analytics Code (with parameters PageView, PageLoadTime), in the case user request non existing page, should I render Google code or not? Right now I use Google Analytics Code on the common template page, such that every page, also non existing page with error message contains Google Analytics Code, it seems like it has influence on WMT.

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• NTP configuration not recognized?

  - by Eugene S

  I'm trying to configure NTP on my machine but it seems that the parameters I set are not being read by the system. Below is my /etc/ntp.conf file. (I applied the most basic configuration to eliminate other issues) server 10.45.68.47 server 127.0.0.1 After I set the above configuration, I restart the ntpd process by doing the following: service ntpd restart And then I get the following output: Shutting down ntpd: [ OK ] ntpd: Synchronizing with time server: [FAILED] Starting ntpd: [ OK ] Moreover, I can see the following in /var/etc/messages: Apr 2 10:54:07 hsystem1a ntpd[21067]: ntpd exiting on signal 15 Apr 2 10:54:07 hsystem1a ntpdate[21537]: can't find host ntpServer1 Apr 2 10:54:07 hsystem1a ntpdate[21537]: can't find host ntpServer2 Apr 2 10:54:07 hsystem1a ntpdate[21537]: no servers can be used, exiting So it seems that the ntpServer1 and the ntpServer2 are being read from somewhere instead of the IPs I configured in /etc/ntp.conf. NOTE: I done init 6 on the machine just in case. Thanks!

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• Connect to a particular network connection from terminal

  - by RanRag

  I am currently using Reliance netconnect USB modem. The problem I am facing is my USB modem disconnects itself at 22:00 PM IST everyday. Now, sometimes what I do is start some downloading and leave my laptop for 2-3 hours in this case if my network disconnects it is a problem for me. So, what I used to do in windows is make a python script and execute rasdial myconnection_name to automate the connection process in my absence. Now I want to achieve something similar in linux. So, what are my alternatives for rasdial like tool in linux to automatically connect to a particular connection . I am using ubuntu 12.04 and here is my nm-tool output.

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• Advertising on personalized pages behind a login

  - by johneth

  I am currently building a web app which requires a user to log in. After they log in, they can see the content they've added to the web app, and things that the web app has done with the content they added. The URL structure won't differentiate different users (e.g. all user's 'homepage' would be example.com/home, not something like example.com/username/home). This is much the same way that Facebook works (all FB user's messages are at facebook.com/messages, for example). This presents a problem with advertising. I know that you can use AdSense behind a login, but as far as I'm aware, that's for things like forums, where everyone sees the same things (which wouldn't be the case in this site). I also know that I could put AdSense on the pages without allowing it to log in, which would produce inferior ads. I'm fairly certain it would be against the Terms of Service to give AdSense a login to a 'dummy' account with typical content, as it would not be seeing the same thing as every other user (which is impossible, as they all see different things). So, my question is: Is there an ad network, or other method, that can serve ads behind a login, maybe based on keywords rather than content?

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• Why isn't Adobe software multilingual?

  - by Takowaki

  I work in a design studio with several non-native English speakers (in this case, into Japanese and Chinese). I have installed the latest Creative Suite (CS5) on our mac stations and was once again disappointed that unlike so many modern software packages there is still no option to change the language of the software. Most of the team has been good enough to work on their English, but it would be much more helpful for them to work in their native language. Why does Adobe continue to require separate licenses based on language? Are they operating under the assumption that only a single language is ever spoken in any given country? Are there any other third party options or does Adobe at least have some sort of statement regarding this policy?

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• make gnome3 to work as I expect! [closed]

  - by gnome

  Possible Duplicate: How to revert to GNOME Classic? I don't like unity so I tried Ubuntu Gnome Remix 12.10. But I feel disappointed too. - No right click on desktop. (I know there is a way to enable it). - No icon on desktop. - I want to have "applications", "palces", "systems" on top panel as before. It just takes much more steps to arrive where I want to go in default gnome 3 settings. - It seems to me that for some applications, when it is maximalized, there is no close buttons or "restore to previous size" button. In fact, it has no title bar in this case, so I can't drag the title bar to restore its previous size and move the window. So I got 3 questions here: (for those who like the way gnome work before) What difference between gnome2 and gnome3 that you prefer the way it works in gnome2? How do you change it to work in the gnome2 way? I don't like the appearance in gnome3. For those who have tried to make your gnome3 looks good, could you share how you customize your gnome3 appearance? (this is for chatting only, not a real question) Why all the main OS (Windows, Mac, Some Linux) want to integrate Desktop and Tablet with focus on Tablet? (Which means that when it is installed on a desktop, it still has tablet appearance, which makes things strange.) Do they think the personal desktop PC will become less and less?

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• Why is 'grep -i' so slow? How to do it faster for ASCII?

  - by Vi.

  Consider: $ time lzop -d < tvtropes-index.lzo | egrep -B 5 '[Dd][eE][sS][cC][eE][nN][dD] ?[Ff][rR][oO][mM]' real 0m0.438s $ time lzop -d < tvtropes-index.lzo | egrep -B 5 'descend ?from' -i real 0m11.294s Both search case insensitively. Why is the -i version so slow? How do I make grep -i fast without entering things like [iI][nN] [tT][hH][iI][sS] [wW][aA][Yy]? For example, perl -ne 'print if /descend ?from/i' works fast, but '-B 5' is not as trivial to implement as in grep (as well as other options).

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