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  • Ruby on Rails wildcard routing such as /foo.htm /foo.php /foo.something

    - by fregas
    I'm trying to create a routing situation where by default, any URL's such as this: /foo /something /foo.php /somethingelse.xml /something.something.else etc. will all route to one controller, assuming they don't route anywhere else. i can get this to work with the following code in my routes: map.myroute '/:file_or_folder', :controller = 'mycontroller' this works fine as long as there are no dots in the URL: /something but this wont work: /something.foo any ideas?

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  • "sudo apt -get install foo-" causes removing foo package and everything depends on it

    - by M.Elmi
    While working in command prompt, I accidentally typed following command: sudo apt-get install python3- and ubuntu started removing python3 and everything depends on it (including firefox and much more). Fortunately I closed that terminal immediately and reverted everything by checking dpkg log file, but I was wondering why an install command should act like remove? Is it a bug? Consider the situation that you are looking for a package name (pressing Tab twice) and going through possibilities by pressing Enter key and those Enter keys remain in the keyboard buffer and.... youhaaaa... apt-get is removing the entire installation in front of your eyes.

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  • Happy Tau Day! (Or: How Some Mathematicians Think We Should Retire Pi) [Video]

    - by Jason Fitzpatrick
    When you were in school you learned all about Pi and its relationship to circles and turn-based geometry. Some mathematicians are rallying for a new lesson, on about Tau. Michael Hartl is a mathematician on a mission, a mission to get people away from using Pi and to start using Tau. His manifesto opens: Welcome to The Tau Manifesto. This manifesto is dedicated to one of the most important numbers in mathematics, perhaps the most important: the circle constant relating the circumference of a circle to its linear dimension. For millennia, the circle has been considered the most perfect of shapes, and the circle constant captures the geometry of the circle in a single number. Of course, the traditional choice of circle constant is p—but, as mathematician Bob Palais notes in his delightful article “p Is Wrong!”,1 p is wrong. It’s time to set things right. Why is Pi wrong? Among the arguments is that Tau is the ration of a circumference to the radius of a circle and defining circles by their radius is more natural and that Pi is a 2-factor number but with Tau everything is based of a single unit–three quarters of a turn around a Tau-defined circle is simply three quarters of a Tau radian. Watch the video above to see the Tau sequence (which begins 6.2831853071…) turned into a musical composition. For more information about Tau hit up the link below to read the manifesto. The Tau Manifesto [TauDay] HTG Explains: Photography with Film-Based CamerasHow to Clean Your Dirty Smartphone (Without Breaking Something)What is a Histogram, and How Can I Use it to Improve My Photos?

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  • Ways to organize interface and implementation in C++

    - by Felix Dombek
    I've seen that there are several different paradigms in C++ concerning what goes into the header file and what to the cpp file. AFAIK, most people, especially those from a C background, do: foo.h class foo { private: int mem; int bar(); public: foo(); foo(const foo&); foo& operator=(foo); ~foo(); } foo.cpp #include foo.h foo::bar() { return mem; } foo::foo() { mem = 42; } foo::foo(const foo& f) { mem = f.mem; } foo::operator=(foo f) { mem = f.mem; } foo::~foo() {} int main(int argc, char *argv[]) { foo f; } However, my lecturers usually teach C++ to beginners like this: foo.h class foo { private: int mem; int bar() { return mem; } public: foo() { mem = 42; } foo(const foo& f) { mem = f.mem; } foo& operator=(foo f) { mem = f.mem; } ~foo() {} } foo.cpp #include foo.h int main(int argc, char* argv[]) { foo f; } // other global helper functions, DLL exports, and whatnot Originally coming from Java, I have also always stuck to this second way for several reasons, such as that I only have to change something in one place if the interface or method names change, and that I like the different indentation of things in classes when I look at their implementation, and that I find names more readable as foo compared to foo::foo. I want to collect pro's and con's for either way. Maybe there are even still other ways? One disadvantage of my way is of course the need for occasional forward declarations.

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  • Ways to organize interface and implementation in C++

    - by Felix Dombek
    I've seen that there are several different paradigms in C++ concerning what goes into the header file and what to the cpp file. AFAIK, most people, especially those from a C background, do: foo.h class foo { private: int mem; int bar(); public: foo(); foo(const foo&); foo& operator=(foo); ~foo(); } foo.cpp #include foo.h foo::bar() { return mem; } foo::foo() { mem = 42; } foo::foo(const foo& f) { mem = f.mem; } foo::operator=(foo f) { mem = f.mem; } foo::~foo() {} int main(int argc, char *argv[]) { foo f; } However, my lecturers usually teach C++ to beginners like this: foo.h class foo { private: int mem; int bar() { return mem; } public: foo() { mem = 42; } foo(const foo& f) { mem = f.mem; } foo& operator=(foo f) { mem = f.mem; } ~foo() {} } foo.cpp #include foo.h int main(int argc, char* argv[]) { foo f; } // other global helper functions, DLL exports, and whatnot Originally coming from Java, I have also always stuck to this second way for several reasons, such as that I only have to change something in one place if the interface or method names change, that I like the different indentation of things in classes when I look at their implementation, and that I find names more readable as foo compared to foo::foo. I want to collect pro's and con's for either way. Maybe there are even still other ways? One disadvantage of my way is of course the need for occasional forward declarations.

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  • Foo f = Foo(); // no matching function for call to 'Foo::Foo(Foo)' ... huh?!

    - by Kyle
    class Foo { public: explicit Foo() {} explicit Foo(Foo&) {} }; Foo d = Foo(); error: no matching function for call to 'Foo::Foo(Foo)' I tried changing Foo(Foo&) to Foo(Foo) as the error suggests, which AFAIK is not a valid constructor, and sure enough I get: error: invalid constructor; you probably meant ‘Foo (const Foo&)’ What gives? How do I resolve this? (This is on GCC by the way)

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  • javascript RegEx hashtag matching #foo and #foo-fåäö but not http://this.is/no#hashtag

    - by Simon B.
    Currently we're using javascript new RegExp('#[^,#=!\s][^,#=!\s]*') (see [1]) and it mostly works, except that it also matches URLs with anchors like http://this.is/no#hashtag and also we'd rather avoid matching foo#bar Some attempts have been made with look-ahead but it doesn't seem to work, or that I just don't get it. With the below source text: #public #writable #kommentarer-till-beta -- all these should be matched Verkligen #bra jobbat! T ex #kommentarer till #artiklar och #blogginlägg, kool. -- mixed within text http://this.is/no#hashtag -- problem xxy#bar -- We'd prefer not matching this one, and... #foo=bar =foo#bar -- we probably shouldn't match any of those either. #foo,bar #foo;bar #foo-bar #foo:bar -- We're flexible on whether these get matched in part or in full . We'd like to get below output: (showing $ instead of <a class=tag href=.....>...</a> for readability reasons) $ $ $ -- all these should be matched Verkligen $ jobbat! T ex $ till $ och $, kool. -- mixed within text http://this.is/no$ -- problem xxy$ -- We'd prefer not matching this one, and... $=bar =foo$ -- we probably shouldn't match any of those either. $,bar $ $ $ -- We're flexible on whether these get matched in part or in full [1] http://github.com/ether/pad/blob/master/etherpad/src/plugins/twitterStyleTags/hooks.js

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  • How to get ~/foo from /home/user1/foo?

    - by Claudius
    The Bash prompt supports the \w escape sequence, documented as \w the current working directory, with $HOME abbreviated with a tilde (uses the value of the PROMPT_DIRTRIM variable) Is there any way to get a similar abbreviation for an arbitrary string? That is, is there a general command that does something like the following, provided that HOME=/home/user1 /home/user1 ? ~ /home/user1/a/1 ? ~/a/1 /home/user2/b/2 ? ~user2/b/2 /root ? ~root Sure, I could try something ugly with sed, but that is unlikely to give me the result I want in any case. :-) The movitation behind this is that I would like to keep the titles in the tabs of my terminals as short as possible, hence abbreviate working directories where possible.

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  • jQuery $.each(arr, foo) versus $(arr).each(foo)

    - by Brian M. Hunt
    In jQuery, what's the difference between the following two constructions of jQuery.each: // Given var arr = [1,2,3,4], results = [], foo = function (index, element) { /* something done to/with each element */ results.push(element * element); // arbitrary thing. } // construction #1 $.each(arr, foo); // results = [1,4,9,16] // construction #2 $(arr).each(foo); // results = [1,4,9,16] Is there any difference, or is it purely syntax?

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  • C++: Cannot convert from foo& to foo*

    - by Rosarch
    I have a method: odp(foo& bar); I'm trying to call it: foo baz; odp(&baz); I get a compiler error: error C2664: "odp" cannot convert parameter 1 from 'foo *' to 'foo &' What am I doing wrong? Aren't I passing in a reference to baz? UPDATE: Perhaps I have a misconception about the relationship between pointers and references. I thought that they were the same, except references couldn't be null. Is that incorrect?

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  • log4j.xml show com.foo, but hide com.foo.bar

    - by Bas Hendriks
    Hi, I have the following log4j.xml configuration: <log4j:configuration> <appender name = "CONSOLE" class = "org.apache.log4j.ConsoleAppender"> <param name = "Target" value = "System.out"/> <param name = "Threshold" value = "DEBUG"/> </appender> <category name = "com.foo"> <appender-ref ref = "CONSOLE"/> </category> </log4j:configuration> This displays every log in com.foo.* . I want to disable logging in com.foo.bar.* . How do i do this.

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  • C# cast Foo<Bar> to Foo<object>

    - by Michael
    Hi, does anyone know if it is possible to cast a generic type with a certain type parameter (e.g. Bar) to the same generic type with the type parameter being a base type of Bar (such as object in my case). And, if it is possible, how would it be done? What I want to do is have a collection of Foo but be able to add Foos with more specific type arguments. Thanks

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  • Web SMTP Server(foo.com) will not send mail to exchange server which is also(foo.com)

    - by Atom
    I think I understand this problem fully, but I do not know how to approach it or where to go in terms of troubleshooting. I've got my one domain http://foo.com that runs a Zen Cart installation that needs to be able to send emails to users(order confirmation, password reset). This works fine to send to any other domain BUT foo.com. I'm running a locally hosted exchange server that is foo.com, and we can send and receive email just fine. If I run tail -f /usr/local/psa/var/log/maillog I recieve this error: Apr 1 10:08:51 foo qmail-local-handlers[25824]: Handlers Filter before-local for qmail started ... Apr 1 10:08:51 foo qmail-local-handlers[25824]: from= Apr 1 10:08:51 foo qmail-local-handlers[25824]: [email protected] Apr 1 10:08:51 foo qmail-local-handlers[25824]: cannot reinject message to '[email protected]' Apr 1 10:08:51 foo qmail: 1270141731.583139 delivery 32410: failure: This_address_no_longer_accepts_mail./ Apr 1 10:08:51 foo qmail: 1270141731.584098 status: local 0/10 remote 0/20 I understand that the foo.com SMTP service doesn't have any account but the one that is used to authenticate mail being sent, so of course, I understand why it's saying 'this address no longer accepts mail'. My question is, how can I get the foo.com(web) SMTP service to handle emails meant for my exchange server([email protected]) or how do I handle the mail that needs to be sent to our exchange server? Is this something to do with MX records? Thanks in advance A

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  • Params order in Foo.new(params[:foo]), need one before the other (Rails)

    - by Jeena
    I have a problem which I don't know how to fix. It has to do with the unsorted params hash. I have a object Reservation which has a virtual time= attribute and a virtual eating_session= attribute when I set the time= I also want to validate it via an external server request. I do that with help of the method times() which makes a lookup on a other server and saves all possible times in the @times variable. The problem now is that the method times() needs the eating_session attribute to find out which times are valid, but rails sometimes calls the times= method first, before there is any eating_session in the Reservation object when I just do @reservation = Reservation.new(params[:reservation]) class ReservationsController < ApplicationController def new @reservation = Reservation.new(params[:reservation]) # ... end end class Reservation < ActiveRecord::Base include SoapClient attr_accessor :date, :time belongs_to :eating_session def time=(time) @time = times.find { |t| t[:time] == time } end def times return @times if defined? @times @times = [] response = call_soap :search_availability { # eating_session is sometimes nil :session_id => eating_session.code, # <- HERE IS THE PROBLEM :dining_date => date } response[:result].each do |result| @times << { :time => "#{DateTime.parse(result[:time]).strftime("%H:%M")}", :correlation_data => result[:correlation_data] } end @times end end I have no idea how to fix this, any help is apriciated.

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  • What do you call "X <= $foo <= Y" comparison?

    - by Jakob
    While writing a Perl statement like if ( $foo >= X && $foo <= Y ) yet again, I wondered why many programming languages do not support the more comfortable form if ( X <= $foo <= Y ) and what this is called. I came up with "3-legged comparison" but no results when searching for it. By the way there is also the "element-of-set" form if ( $foo in X..Y ) which I only consider more readable when provided via a short keyword. Is there a term for X <= $foo <= Y comparison? Which languages support it?

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  • Weblogic 12 and the CLI

    - by Rig
    I am working with WebLogic on Fedora 19 and am attempting to use the CLI tools to no avail. It appears these were deprecated as far back as WebLogic 9 however I was assured they are still there and still functional. As it stands I have a need to use them if they are in fact functional. What appears to the case is that the weblogic jar file is not being loaded correctly to the classpath by this script after trying to manually add it to the classpath as it fails when trying to add those jars via java -classpath <path>. I've spent a lot of time so far trying to get this sorted out but I'm wondering what I may be missing here. My Java runtime is version 7, Fedora is 19, and WebLogic is 12.1. When I run env after running the provided set environment script it appears to have no impact from what I can see. (I'll add that later when I get back to that machine). I'm mostly a Windows developer so some of this is a topic I'm not well versed in. [foo@localhost bin]$ ./setDomainEnv.sh [foo@localhost bin]$ java weblogic.Admin -url t3://localhost:7001 -username <username> -password <password> HELP Error: Could not find or load main class weblogic.Admin [foo@localhost bin]$ ls -ltar total 72 drwxr-x--- 2 foo foo 4096 Jun 2 07:36 service_migration drwxr-x--- 2 foo foo 4096 Jun 2 07:36 server_migration drwxr-x--- 2 foo foo 4096 Jun 2 07:36 nodemanager -rwxr-x--- 1 foo foo 1267 Jun 2 07:36 setStartupEnv.sh -rwxr-x--- 1 foo foo 1105 Jun 2 07:36 startNodeManager.sh -rwxr-x--- 1 foo foo 5765 Jun 2 07:36 startWebLogic.sh -rwxr-x--- 1 foo foo 2001 Jun 2 07:36 stopWebLogic.sh -rwxr-x--- 1 foo foo 3170 Jun 2 07:36 startManagedWebLogic.sh -rwxr-x--- 1 foo foo 2776 Jun 2 07:36 stopManagedWebLogic.sh -rwxrwxrwx 1 foo foo 14136 Jun 2 07:36 setDomainEnv.sh -rwxr-x--- 1 foo foo 2060 Jun 2 07:36 startComponent.sh drwxr-x--- 5 foo foo 4096 Jun 2 07:36 . -rwxr-x--- 1 foo foo 1726 Jun 2 07:36 stopComponent.sh drwxr-x--- 12 foo foo 4096 Jun 2 07:45 ..

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  • JavaScript: 'foo.value' not working in IE?

    - by pete
    Hi! A few hours ago, I was instructed how to style a specific textarea with JS. The following piece of code (thanks again, Mario Menger) works like a charm in Firefox but unfortunately nothing happens in Internet Explorer (7 tested only so far). var foo = document.getElementById('HCB_textarea'); var defaultText = 'Your message here'; foo.value = defaultText; foo.style.color = '#888'; foo.onfocus = function(){ foo.style.color = '#000'; if ( foo.value == defaultText ) { foo.value = ''; } }; foo.onblur = function(){ foo.style.color = '#888'; if ( foo.value == '' ) { foo.value = defaultText; } }; I've already tried to replace 'value' by 'innerHTML' (for IE only) but to no effect. Any suggestions? TIA

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  • introducing pointers to a large software project

    - by stefan
    I have a fairly large software project written in c++. In there, there is a class foo which represents a structure (by which i don't mean the programmers struct) in which foo-objects can be part of a foo-object. Here's class foo in simplest form: class Foo { private: std::vector<unsigned int> indices; public: void addFooIndex(unsigned int); unsigned int getFooIndex(unsigned int); }; Every foo-object is currently stored in an object of class bar. class Bar { private: std::vector<Foo> foos; public: void addFoo(Foo); std::vector<Foo> getFoos(); } So if a foo-object should represent a structure with a "inner" foo-object, I currently do Foo foo; Foo innerFoo; foo.addFooIndex(bar.getFoos().size() - 1); bar.addFoo(innerFoo); And to get it, I obviously use: Foo foo; for ( unsigned int i = 0; i < foo.getFooIndices().size(); ++i ) { Foo inner_foo; assert( foo.getFooIndices().at(i) < bar.getFoos().size() ); inner_foo = bar.getFoos().at(foo.getFooIndices().at(i)); } So this is not a problem. It just works. But it's not the most elegant solution. I now want to make the inner foos to be "more connected" with the foo-object. It would be obviously to change class foo to: class Foo { private: std::vector<Foo*> foo_pointers; public: void addFooPointer(Foo*); std::vector<Foo*> getFooPointers(); }; So now, for my question: How to gently change this basic class without messing up the whole code? Is there a "clean way"?

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  • Python function argument scope (Dictionaries v. Strings)

    - by Shaun Meyer
    Hello, given: foo = "foo" def bar(foo): foo = "bar" bar(foo) print foo # foo is still "foo"... foo = {'foo':"foo"} def bar(foo): foo['foo'] = "bar" bar(foo) print foo['foo'] # foo['foo'] is now "bar"? I have a function that has been inadvertently over-writing my function parameters when I pass a dictionary. Is there a clean way to declare my parameters as constant or am I stuck making a copy of the dictionary within the function? Thanks!

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  • Non-Dom Element Event Binding with jQuery

    - by Rick Strahl
    Yesterday I had a short discussion with Dave Reed on Twitter regarding setting up fake ‘events’ on objects that are hookable. jQuery makes it real easy to bind events on DOM elements and with a little bit of extra work (that I didn’t know about) you can also set up binding to non-DOM element ‘event’ bindings. Assume for a second that you have a simple JavaScript object like this: var item = { sku: "wwhelp" , foo: function() { alert('orginal foo function'); } }; and you want to be notified when the foo function is called. You can use jQuery to bind the handler like this: $(item).bind("foo", function () { alert('foo Hook called'); } ); Binding alone won’t actually cause the handler to be triggered so when you call: item.foo(); you only get the ‘original’ message. In order to fire both the original handler and the bound event hook you have to use the .trigger() function: $(item).trigger("foo"); Now if you do the following complete sequence: var item = { sku: "wwhelp" , foo: function() { alert('orginal foo function'); } }; $(item).bind("foo", function () { alert('foo hook called'); } ); $(item).trigger("foo"); You’ll see the ‘hook’ message first followed by the ‘original’ message fired in succession. In other words, using this mechanism you can hook standard object functions and chain events to them in a way similar to the way you can do with DOM elements. The main difference is that the ‘event’ has to be explicitly triggered in order for this to happen rather than just calling the method directly. .trigger() relies on some internal logic that checks for event bindings on the object (attached via an expando property) which .trigger() searches for in its bound event list. Once the ‘event’ is found it’s called prior to execution of the original function. This is pretty useful as it allows you to create standard JavaScript objects that can act as event handlers and are effectively hookable without having to explicitly override event definitions with JavaScript function handlers. You get all the benefits of jQuery’s event methods including the ability to hook up multiple events to the same handler function and the ability to uniquely identify each specific event instance with post fix string names (ie. .bind("MyEvent.MyName") and .unbind("MyEvent.MyName") to bind MyEvent). Watch out for an .unbind() Bug Note that there appears to be a bug with .unbind() in jQuery that doesn’t reliably unbind an event and results in a elem.removeEventListener is not a function error. The following code demonstrates: var item = { sku: "wwhelp", foo: function () { alert('orginal foo function'); } }; $(item).bind("foo.first", function () { alert('foo hook called'); }); $(item).bind("foo.second", function () { alert('foo hook2 called'); }); $(item).trigger("foo"); setTimeout(function () { $(item).unbind("foo"); // $(item).unbind("foo.first"); // $(item).unbind("foo.second"); $(item).trigger("foo"); }, 3000); The setTimeout call delays the unbinding and is supposed to remove the event binding on the foo function. It fails both with the foo only value (both if assigned only as “foo” or “foo.first/second” as well as when removing both of the postfixed event handlers explicitly. Oddly the following that removes only one of the two handlers works: setTimeout(function () { //$(item).unbind("foo"); $(item).unbind("foo.first"); // $(item).unbind("foo.second"); $(item).trigger("foo"); }, 3000); this actually works which is weird as the code in unbind tries to unbind using a DOM method that doesn’t exist. <shrug> A partial workaround for unbinding all ‘foo’ events is the following: setTimeout(function () { $.event.special.foo = { teardown: function () { alert('teardown'); return true; } }; $(item).unbind("foo"); $(item).trigger("foo"); }, 3000); which is a bit cryptic to say the least but it seems to work more reliably. I can’t take credit for any of this – thanks to Dave Reed and Damien Edwards who pointed out some of these behaviors. I didn’t find any good descriptions of the process so thought it’d be good to write it down here. Hope some of you find this helpful.© Rick Strahl, West Wind Technologies, 2005-2010Posted in jQuery  

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  • Mod_rewrite pretty url when domain/foo is a directory

    - by ModRewriter
    Starting with something as simple as: RewriteRule ^(.*)$ index.php?page=$1 What if I also want the following to work: RewriteRule ^/foo$ /index.php?page=foo #/foo IS a directory This seem to work ONLY if the R flag is set, but then the full non-pretty url is written. Thus it seems I can REDIRECT existing directory, but not rewrite them... Maybe with an .htaccess inside the directory itself? Or some PHP magic in /foo/index.php like header(/index.php?page=foo)? Will it work? Will it be HTTP standard/search engine optimized? Please help! PS: The oddest idea occurred to me: redirecting /foo to /not-a-dir, and then rewriting /not-a-dir to /index.php?p=foo should theorically work... But... Come on... Really?!?

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