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  • weakref list in python

    - by Dan
    I'm in need of a list of weak references that deletes items when they die. Currently the only way I have of doing this is to keep flushing the list (removing dead references manually). I'm aware there's a WeakKeyDictionary and a WeakValueDictionary, but I'm really after a WeakList, is there a way of doing this? Here's an example: import weakref class A(object): def __init__(self): pass class B(object): def __init__(self): self._references = [] def addReference(self, obj): self._references.append(weakref.ref(obj)) def flush(self): toRemove = [] for ref in self._references: if ref() is None: toRemove.append(ref) for item in toRemove: self._references.remove(item) b = B() a1 = A() b.addReference(a1) a2 = A() b.addReference(a2) del a1 b.flush() del a2 b.flush()

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  • Inserting mutable pairs into a mutable list

    - by Romelus
    How can I push a mutable pair onto a stack such that i'm only creating one stack. I have some code that works but creates lists within lists within lists.... Here is what I believe should work but throws an error. (define func (arg1 arg2 arg3) // Where arg3 is an empty list (mappend (mcons arg1 arg2) arg3)) The above code complains and says: "mcar: expects argument of type ; given ... Can anyone show me how I can get a result that looks like so,: (list (arg1 arg2) (arg# arg#) ...)

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  • Get foreign key in external content type to show up in list view

    - by Rob
    I have come across blogs about how to setup an external content type (e.g. http://www.dotnetmafia.com/blogs/dotnettipoftheday/archive/2010/02/02/it-s-easy-to-configure-an-external-list-with-business-connectivity-services-bcs-in-sharepoint-foundation-2010.aspx) but I have not seen any examples of what to do when your external SQL DB has foreign keys. For example. I have a database that has orders and customers. An order has one and only one customer and a customer can have many orders. How can I setup external content types in such a way that when in the list view of these external content types, I can jump between and possible lookup values to that other type?

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  • Indy 10 FTP empty list

    - by Lobuno
    Hello! I have been receiving reports from some of my users that, when using idFTP.List() from some servers (MS FTP) then the listing is received as empty (no files) when in reality there are (non-hidden) files on the current directory. May this be a case of a missing parser? The funny think, when I use the program to get the list from MY server (MSFTP on W2003) everything seems OK but on some servers I've been hitting this problem. Using latest Indy10 on D2010. Any idea?

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  • avoid check of list of known hosts

    - by shantanuo
    I get the following prompt everytime I try to connect a server using SSH. I type "yes", but is there a way to aovid this? The authenticity of host '111.222.333.444 (111.222.333.444)' can't be established. RSA key fingerprint is f3:cf:58:ae:71:0b:c8:04:6f:34:a3:b2:e4:1e:0c:8b. Are you sure you want to continue connecting (yes/no)?

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  • Pass elements of a list as arguments to a function in python

    - by Wilduck
    I'm building a simple interpreter in python and I'm having trouble handling differing numbers of arguments to my functions. My current method is to get a list of the commands/arguments as follows. args = str(raw_input('>> ')).split() com = args.pop(0) Then to execute com, I check to see if it is in my dictionary of command- code mappings and if it is I call the function I have stored there. For a command with no arguments, this would look like: commands[com]() However, if a command had multiple arguments, I would want this: commands[com](args[0],args[1]) Is there some trick where I could pass some (or all) of the elements of my arg list to the function that I'm trying to call? Or is there a better way of implementing this without having to use python's cmd class?

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  • Array of Arrays in C#

    - by Betamoo
    I need to know how to initialize array of arrays in C#.. I know that there exist multidimensional array, but I think I do not need that in my case! I tried this code.. but could not know how to initialize with initializer list.. double[][] a=new double[2][];// ={{1,2},{3,4}}; Thank you PS: If you wonder why I use it: I need data structure that when I call obj[0] it returns an array.. I know it is strange.. Thanks

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  • c# binarysearch a list<T> by a member of T

    - by Pygmy
    I have a baseclass Event with a DateTime member TimeStamp. Lots of other event-classes will derive from this. I want to be able to search a list of events (that can contain events with duplicate timestamps) fast, so I'd like to use a binary search. So I started out writing something like this : public class EventList<T> : List<T> where T : Event { private IComparer<T> comparer = (x, y) => Comparer<DateTime>.Default.Compare(x.TimeStamp, y.TimeStamp); public IEnumerable<T> EventsBetween(DateTime inFromTime, DateTime inToTime) { // Find the index for the beginning. int index = this.BinarySearch(inFromTime, comparer); // BLAH REST OF IMPLEMENTATION } } The problem is that the BinarySearch only accepts T (so - an Event type) as parameter, while I want to search based on a member of T - the TimeStamp. What would be a good way to approach this ?

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  • C# - Accesing to items for a collection inherited from List<string>

    - by Salvador
    I am trying to implement a new class inherited from List<string>, to load the contents from a text file to the items. using System.Collections.Generic; using System.IO; using System.Linq; public class ListExt: List<string> { string baseDirectory; public LoadFromFile(string FileName) { this._items = File.ReadAllLines(FileName).ToList();//does not work because _list is private } } but i dont knew how to load the lines into the _items property because is private. any suggestions?

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  • How to send a list of object from my MainPage.xaml to another page

    - by LivingThing
    When navigating to another page how can i make my list of object available to another page. for example in my mainpage.xaml var data2 = from query in document.Descendants("weather") select new Forecast { date = (string)query.Element("date"), tempMaxC = (string)query.Element("tempMaxC"), tempMinC = (string)query.Element("tempMinC"), weatherIconUrl = (string)query.Element("weatherIconUrl"), }; forecasts = data2.ToList<Forecast>(); .... NavigationService.Navigate(new Uri("/WeatherInfoPage.xaml", UriKind.Relative)); and then in my other class, i want to make it available so that i can use it like this private void AddPageItem(List<Forecast> forecasts) { .. }

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  • Databind List Of Objects To A WinForms DataGridView, But Not Show Certain Public Properties

    - by Pyronaut
    I'm not even sure if i'm doing this correctly. But basically I have a list of objects that are built out of a class. From there, I am binding the list to a datagrid view that is on a Windows Form (C#) From there, it shows all the public properties of the object, in the datagrid view. However there is some properties that i still need accessible from other parts of my application, but aren't really required to be visible in the DataGridView. So is there an attribute or something similar that I can write above the property to exclude it from being shown. P.S. Im binding at runtime. So i cannot edit the columns via the designer. P.P.S. Please no answers of just making public variables (Although if that is the only way, let me know :)).

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  • Unable to add IPv6 address to sendmail access list

    - by David M. Syzdek
    I am running Sendmail 8.14.4 on Slackware 13.37. I have the following in my /etc/mail/access file and it works without any errors: Connect:127 OK Connect:10.0.1 RELAY # Net: office Connect:50.116.6.8 RELAY # Host: glider Connect:96.126.127.87 RELAY # Host: kite The above configuration also allows me to send an e-mail via IPv6 to a local user on the mail server. However, it does not allow my office to relay via IPv6. I have tried two ways of adding IPv6 networks to my access file. Method 1: Connect:127 OK Connect:10.0.1 RELAY # Net: office Connect:IPv6:2001:470:b:84a RELAY # Net: office Connect:50.116.6.8 RELAY # Host: glider Connect:96.126.127.87 RELAY # Host: kite Method 2: Connect:127 OK Connect:10.0.1 RELAY # Net: office Connect:[IPv6:2001:470:b:84a] RELAY # Net: office Connect:50.116.6.8 RELAY # Host: glider Connect:96.126.127.87 RELAY # Host: kite However whenever I try using either method 1 or 2, I am unable to relay e-mail messages through the host. /var/log/maillog entry: May 31 11:57:15 freshsalmon sm-mta[25500]: ruleset=check_relay, arg1=[IPv6:2001:470:b:84a:223:6cff:fe80:35dc], arg2=IPv6:2001:470:b:84a:223:6cff:fe80:35dc, relay=[IPv6:2001:470:b:84a:223:6cff:fe80:35dc], reject=553 5.3.0 RELAY # Net:office Test session from telnet: syzdek@blackenhawk$ telnet -6 freshsalmon.office.example.com 25 Trying 2001:470:b:84a::69... Connected to freshsalmon.office.bindlebinaries.com. Escape character is '^]'. 220 office.example.com ESMTP Sendmail 8.14.4/8.14.4; Thu, 31 May 2012 11:57:15 -0800 HELO blackenhawk.office.example.com 250 office.example.com Hello [IPv6:2001:470:b:84a:223:6cff:fe80:35dc], pleased to meet you MAIL FROM:[email protected] 553 5.3.0 RELAY # Net:office What is the correct way to add an IPv6 address/network to the access file in sendmail? Update: Apparently my access file was not working regardless. Removing the comments at the end of the line seems to have fixed the problem. Here is the lines which worked: Connect:127 OK Connect:IPv6:::1 OK # Net: office Connect:10.0.1 RELAY Connect:IPv6:2001:470:b:84a RELAY # Host: glider Connect:50.116.6.8 RELAY Connect:IPv6:2600:3c01::f03c:91ff:fedf:381a RELAY # Host: kite Connect:96.126.127.87 RELAY Connect:IPv6:2600:3c00::f03c:91ff:fedf:52a4 RELAY

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  • Ruby erb template- try to change layout- get error

    - by nigel curruthers
    Hi there! I'm working my way through adapting a template I have been given that is basically a list of products for sale. I want to change it from a top-down list into a table layout. I want to end up with something as follows- <div id= 'ladiesproducts'> <% ladies_products = hosting_products.find_all do |product| product.name.match("ladies") end %> <table><tbody> <% [ladies_products].each do | slice | %> <tr> <% slice.each do | product | %> <td> <h4><%= product.name.html %></h4> <p><%= product.description %></p> <% other parts go here %> </td> <% end %> </tr> <% end %> </tbody></table> </div> This works fine for the layout that I am trying to achieve. The problem I have is when I paste back the <% other parts go here % part of the code. I get an internal error message on the page. I am completely new to Ruby so am just bumbling my way through this really. I have a hunch that I'm neglecting something that is probably very simple. The <% other parts go here %> code is as follows: <input type='hidden' name='base_renewal_period-<%= i %>' value="<%= product.base_renewal_period %>" /> <input type='hidden' name='quoted_unit_price-<%= i %>' value="<%= billing.price(product.unit_price) %>" /> <p><input type='radio' name='add-product' value='<%= product.specific_type.html %>:<%= i %>:base_renewal_period,quoted_unit_price,domain' /><%= billing.currency_symbol.html %><%= billing.price(product.unit_price, :use_tax_prefs) %> <% if product.base_renewal_period != 'never' %> every <%= product.unit_period.to_s_short.html %> <% end %> <% if product.setup_fee != 0 %> plus a one off fee of <%= billing.currency_symbol.html %><%= sprintf("%.2f", if billing.include_tax? then billing.price(product.setup_fee) else product.setup_fee end) %> <% end %> <% if product.has_free_products? %> <br /> includes free domains <% product.free_products_list.each do | free_product | %> <%= free_product["free_name"] %> <% end %> <% end %> * </p> <% i = i + 1 %> <% end %> <p><input type='submit' value='Add to Basket'/></p> </form> <% unless basket.nil? or basket.empty? or no_upsell? %> <p><a href='basket?add-no-product=package'>No thank you, please continue with my order ...</a></p> <% end %> <% if not billing.tax_applies? %> <% elsif billing.include_tax? %> <p>* Includes <%= billing.tax_name %></p> <% else %> <p>* Excluding <%= billing.tax_name %></p> <% end %> If anyone can point out what I'm doing wrong or what I'm missing or failing to change I would GREATLY appreciate it! Many thanks in advance. Nigel

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  • IE z-index relative/absolute bug in list

    - by AJM
    I have the following navigation where .topNav has position:relative and subnav has position:absolute. I cant get the sublist to appear over the main list due to z-index problems. This seems to be a known problem. <ul> <li class="topNav">About Us <ul class="subNav"><li> Subsection A</li><li>Subsection B</li></ul> </li> </ul> Does anyone know of a workaround? UPDATE http://brh.numbera.com/experiments/ie7_tests/zindex.html shows exacly the problem I have. My original posting was in the context of a list but I have reduced the problem to the fact that z-index dosn't seem to work when have an element with position:absolute inside a parent element with position:relative

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  • get a list of function names in a shell script

    - by n-alexander
    I have a Bourne Shell script that has several functions in it, and allows to be called in the following way: my.sh <func_name> <param1> <param2> Inside func_name() will be called with param1 and param2. I want to create a "help" function that would just list all available functions, even without parameters. The question: how do I get a list of all function names in a script from inside the script? I'd like to avoid having to parse it and look for function patterns. Too easy to get wrong. Thanks, Alex

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  • How can I call a module in a Perl one-liner?

    - by Zaid
    Say I have a data file that I want to process; I want to take the maximum value of each of the column and append it to the end of each line. INPUT: T1 T2 T3 35.82 34.67 31.68 32.20 34.52 33.59 37.41 38.64 37.56 OUTPUT: T1 T2 T3 35.82 34.67 31.68 35.82 32.20 34.52 33.59 34.52 37.41 38.64 37.56 38.64 I'm trying to implement this as a one-liner. So far, this is what I've come up with, although it complains that &main::max is undefined: perl -MList::Util -ani.bak -e "print qq(@F).q( ).max(@F).qq(\n)" file1.txt It seems that I haven't loaded the List::Util module. What's wrong? And is the header column an issue? perlrun doesn't have a decent example on how to do this (actually it does now, my documentation was a little out-of-date).

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  • How to convert an EntityCollection<T> to List<POCOObj>

    - by ggomez
    I have Entity Framework entities Events which have an EntityCollection of RSVP. I want to convert the EntityCollection of RSVP to a generic List< of a POCO class RSVP. So I want EntityCollection - List. What would be the best way to go about achieving this? So far I have this (it's missing the RSVP part) var events = from e in _entities.Event.Include("RSVP") select new BizObjects.Event { EventId = e.EventId, Name = e.Name, Location = e.Location, Organizer = e.Organizer, StartDate = e.StartDate, EndDate = e.EndDate, Description = e.Description, CreatedBy = e.CreatedBy, CreatedOn = e.CreatedOn, ModifiedBy = e.ModifiedBy, ModifiedOn = e.ModifiedOn, RSVPs = ??? }; Thanks.

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  • Don't want to JSON serialize the whole list of classes

    - by mjmcloug
    Hey, I've got a IList of Sites in my application and Site has a large amount of properties. I'm wanting to convert this list to JSON to be used in a dropdownlist similar to this var sites = SiteRepository.FindAllSites(); return new JsonResult() { Data = sites, JsonRequestBehavior = JsonRequestBehavior.AllowGet }; the problem I have is that I only want to use the id and name properties of the site class. I was thinking a way round this would be to use an 'adaptor' class that would then only expose these two properties and I would then serialize that. The problem I have is I want to make the class generic so that it can handle any list of objects. Has anybody come across a similar situation and solved it?

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  • Default value list for pipeline param in Powershell

    - by fatcat1111
    I have a Powershell script that reads values off of the pipeline: PARAM ( [Parameter(ValueFromPipeline = $true)] $s ) PROCESS { echo "* $s" } Works just fine: PS my.ps1 foo * foo I would like the script to have list of default values, as the most common usage will always use the same values and storing them in the default will be most convenient. I did the usual assignment: PARAM ( [Parameter(ValueFromPipeline = $true)] $s = 'bar' ) PROCESS { echo "* $s" } Again, works just fine: PS my.ps1 * bar PS my.ps1 foo * foo However when setting the default to be a list, I get back something entirely reasonable but not at all what I want: PARAM ( [Parameter(ValueFromPipeline = $true)] $s = @('bar', 'bat', 'boy') ) PROCESS { echo "* $s" } Result: PS my.ps1 * bar bat boy I expected: PS my.ps1 * bar * bat * boy How can I get one call in to the Process loop for each default value? (This is somewhat different than getting one call in to Process, and wrapping the current body of in a big foreach loop over $s).

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  • Buddy List: Relational Database Table Design

    - by huntaub
    So, the modern concept of the buddy list: Let's say we have a table called Person. Now, that Person needs to have many buddies (of which each buddy is also in the person class). The most obvious way to construct a relationship would be through a join table. i.e. buddyID person1_id person2_id 0 1 2 1 3 6 But, when a user wants to see their buddy list, the program would have to check the column 'person1_id' and 'person2_id' to find all of their buddies. Is this the appropriate way to implement this kind of table, or would it be better to add the record twice.. i.e. buddyID person1_id person2_id 0 1 2 1 2 1 So that only one column has to be searched. Thanks in advance.

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  • Making hovor state of hidden list visible when page is active

    - by Joel
    Hi guys, One day I hope to not be such a newbie on this stuff, but some of this feels so insurmountable sometimes! OK. I have a nav bar with hidden li items that are visible when hovered over. Here's the live site: http://www.rattletree.com Here's the code for the nav: <ul id="navbar"> <li id="iex"><a href="index.php">About Rattletree</a></li> <li id="upcomgshows"><a href="upcomingshows.php">Calendar</a></li> <li id="sods"><a href="#">Sights &amp; Sounds</a> <ul class="innerlist"> <li class="innerlist"><img class="arrowAdjust" src="images/curved_arrow.png" alt="" /></li> <li class="innerlist"><a href="/playlist.m3u" target="_blank" onclick="javascript:BatmoAudioPop('Rattletree Marimba',this.href,'1'); return false">Listen</a></li> <li class="innerlist"><a href="/new_pictures.php">Photos</a></li> <li class="innerlist"><a href="/video.php">Video</a></li> <li class="innerlist"><a href="/press.php">Press</a></li> </ul> </li> <li id="bookin"><a href="#">Contact</a> <ul class="innerlist"> <li class="innerlist"><img class="arrowAdjust" src="images/curved_arrow.png" alt="" /></li> <li class="innerlist"><a href="/booking.php">Booking Info</a></li> <li class="innerlist"><a href="/media.php">Media Inquiries</a></li> </ul> </li> <li id="ste"> <a href="/sounds.php">Store</a></li> <li id="instrumes"><a href="/instruments.php">The Instruments</a></li> <li id="classe"><a href="classes.php">Workshops</a></li> </ul> css: div#navbar2 { background-color:#546F8B; border-bottom:1px solid #546F8B; border-top:1px solid #000000; display:inline-block; position:relative; width:100%; } div#navbar2 ul#navbar { color:#FFFFFF; font-family:Arial,Helvetica,sans-serif; font-size:16px; letter-spacing:1px; margin:10px 0; padding:0; white-space:nowrap; } div#navbar2 ul#navbar li ul.innerlist { color:#000000; display:none; position:relative; z-index:20; } div#navbar2 ul#navbar li { display:inline; list-style-type:none; margin:0; padding:0; position:relative; } Now it's a bit tricky what I want to do: If a user navigates to one of the innerlist pages, I'd like that innerlist ul to remain visible (with the specific li displaying the hovered state). Now I think I could figure that out on my own, but you can see on the live page that if the user is on a page from the innerlist and that list was visible, then if they hovered over the other nav tab, then those innerlists would overlap. This is a problem. Hopefully that last sentence makes sense! In short: I need to keep the inner list of the active page displaying, BUT if the user hovers over another nav button WITH it's own inner list, then the live innerlist needs to disappear. Clear as mud?

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  • Making a python iterator go backwards?

    - by uberjumper
    Is there anyway to make a python list iterator to go backwards? Basically i have this class IterTest(object): def __init__(self, data): self.data = data self.__iter = None def all(self): self.__iter = iter(self.data) for each in self.__iter: mtd = getattr(self, type(each).__name__) mtd(each) def str(self, item): print item next = self.__iter.next() while isinstance(next, int): print next next = self.__iter.next() def int(self, item): print "Crap i skipped C" if __name__ == '__main__': test = IterTest(['a', 1, 2,3,'c', 17]) test.all() Running this code results in the output: a 1 2 3 Crap i skipped C I know why it gives me the output, however is there a way i can step backwards in the str() method, by one step?

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  • Ho to add dynamic table list to a Fullcalendar page

    - by Dave Burton
    I have implemented a Fullcalendar on a RoR page. I would like to add a list (index) below the calendar showing events for the day the user selects. Click on a day and that days events list below the calendar. I'd like it to be dynamic (don't reload the whole page). Please point me in the right direction to learn how to do this. I have a subscription to Railscast. But, I'm not sure what to look for. Thanks

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