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  • Autopruning after a specified amount of row are created?

    - by Rob
    Basic question, sorry. Basically, I have a script that creates a MySQL entry each time someone visits the page. A logging script. However, I want to make it autoprune after, say, 100 visits. For example in pseudo code: if amount of rows > 100 { delete rows 1+ until amount of rows == 100 } So in a nutshell, each time a new row is added after 100, it needs to automatically remove the row with the smallest id (My primary key).

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  • How to do a back-reference on Google AppEngine?

    - by jCuga
    I'm trying to access an object that is linked to by a db.ReferenceProperty in Google app engine. Here's the model's code: class InquiryQuestion(db.Model): inquiry_ref = db.ReferenceProperty(reference_class=GiftInquiry, required=True, collection_name="inquiry_ref") And I am trying to access it in the following way: linkedObject = question.inquiry_ref and then linkedKey = linkedObject.key but it's not working. Can anyone please help?

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  • shmat() sending signal 11

    - by Sachin Chourasiya
    Please let me know when a call to shmat function can raise a signal 11. if ((shmId=shmget(shmKey, 0, 0)) <= 0) { printf( "shmget(0x%x)", shmKey); return 0; } printf( "queueOpen - Key 0x%x gives ID %d", shmKey, shmId); qh = shmat(shmId, 0, SHM_RND); I am getting a signal 11 by the code above. Please help

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  • WPF Style Triggers: can I apply the one style for a variety of Properties?

    - by Matt H.
    It seems like there has to be a way to do this: I am applying an ItemContainerStyle in my Listbox, based on two property triggers. As you can see, I'm using the exact same set of trigger enter/exit actions, simply applied on two different properties. Is there something equivalent to a <Trigger Property="prop1" OR Property="prop2" ??? (Obviously wouldn't look like that, but that probably gets the point across.) <Style x:Key="ListBoxItemStyle" TargetType="ListBoxItem"> <Style.Triggers> <Trigger Property="IsKeyboardFocusWithin" Value="True"> <Trigger.EnterActions> <BeginStoryboard> <Storyboard> <DoubleAnimation Storyboard.TargetProperty="Height" To="50" Duration="0:0:.3"></DoubleAnimation> </Storyboard> </BeginStoryboard> </Trigger.EnterActions> <Trigger.ExitActions> <BeginStoryboard> <Storyboard> <DoubleAnimation Storyboard.TargetProperty="Height" To="25" Duration="0:0:.3" /> </Storyboard> </BeginStoryboard> </Trigger.ExitActions> </Trigger> </Style.Triggers> </Style> <Style x:Key="ListBoxItemStyle" TargetType="ListBoxItem"> <Style.Triggers> <Trigger Property="IsMouseOver" Value="True"> <Trigger.EnterActions> <BeginStoryboard> <Storyboard> <DoubleAnimation Storyboard.TargetProperty="Height" To="50" Duration="0:0:.3"></DoubleAnimation> </Storyboard> </BeginStoryboard> </Trigger.EnterActions> <Trigger.ExitActions> <BeginStoryboard> <Storyboard> <DoubleAnimation Storyboard.TargetProperty="Height" To="25" Duration="0:0:.3" /> </Storyboard> </BeginStoryboard> </Trigger.ExitActions> </Trigger> </Style.Triggers> </Style>

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  • javascript - query object graph?

    - by Scott
    Given an object like this: var obj = { first:{ second:{ third:'hi there' } } }; And a key like this "first.second.third" How can I get the value of the nested object "hi there"? I think maybe the Array.reduce function could help, but not sure.

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  • Network bandwidth bottleneck for sorting of mapreduce intermediate keys?

    - by Zubair
    I have been learning the mapreduce algorithm and how it can potentially scale to millions of machines, but I don't understand how the sorting of the intermediate keys after the map phase can scale, as there will be: 1,000,000 x 1,000,000 : potential machines communicating small key / value pairs of the intermediate results with each other? Isn't this a bottleneck?

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  • iPhone dev: Get keys (public / private)

    - by Jonny
    I'm using another computer than normal to do iPhone dev. Now I'm trying to get my apps onto my iPhone, but fail with the certificates, keys and stuff. Refer to this thread: http://stackoverflow.com/questions/613719/iphone-provisioning-problem-public-private-key Actually I'm able to download my cert no problem from Apple's site, but how would I get at the keys needed? (private, public), I see no way of getting them...

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  • Need help Linq query join + count + group by

    - by user233540
    I have two table First table BID Town 1 ABC 2 ABC2 3 ABC Second Table PID BID AmountFirst AmountSecond AmountThird Minority 1__ 1___ 1000_____ 1000________ 1000_____ SC 2__ 2___ 2000_____ 1000_______ 2000_____ ST 3__ 3___ 1000____ 1000_______ 1000_______ SC BID is foreign key in Second table. I want sum AmountFirst + AmountSecond +AmountThird for individualTown e.g for ABC town answer should be : 6000 (summation of PID 1 and PID 2) I want Linq query for this..Please help

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  • updating a properties file in a web application

    - by AmiraGL
    i have a properties file (under rsources folder) in which i'm stocking a variable (key=value), i need to update it when a user insert a new value or update the older one , so can i do it ? i have doubts because it's a web application so it' simply a war deployed in the server so how it is possible to access the .properties file and change it directly from the code . if it's not possible is there another solution ? Any Help will be apprecited Many thanks

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  • Decrement all int values in Dictionary

    - by Jon
    I have a Dictionary<string,int> and I simply want to decrement the value in my dictionary by one. I have this but not sure if its best practice. foreach (KeyValuePair<string, int> i in EPCs) { EPCs[i.Key] = i.Value - 1; }

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  • How to see .class content in Eclipse?

    - by mac
    Sometimes, in Eclipse , i press a combination of keys which take me to the editor page that shows contents of my .class file. I never seem to be able to remember what that key combination is. Can someone please let me know?

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  • How to return a value based on the type of the generic T

    - by Blankman
    I have a method like: public T Get<T>(string key) { } Now say I want to return "hello" if the type is a string, and 110011 if it is type int. how can I do that? typeof(T) doesn't seem to work. I ideally want to do a switch statement, and return something based on the Type of the generic (string/int/long/etc). Is this possible?

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  • getting emacs to move cursor by words on a Mac

    - by hatorade
    It's supposed to be M + cursor, but any shortcut in emacs using M (escape) on my mac sucks, because every time i need to use it, i need to release M (the escape key) and then press it again. Is there a better shortcut for moving along words in emacs (kind of like ctr + arrow in windows?)

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  • What's -mutableSetValueForKey: returning, actually? Is that something special?

    - by dontWatchMyProfile
    From the docs: You usually access to-many relationships using mutableSetValueForKey:, which returns a proxy object that both mutates the relationship and sends appropriate key-value observing notifications for you. So this returns an "intelligent" NSMutableSet which automatically lets the context delete objects when they get deleted from the set, and reverse? Is that a proxy object?

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  • launching keyboard of languages other than english

    - by iSight
    hi, i have build a Mac OS X sample application which can open on screen keyboard using NSWorkSpace methods which is in english keys only. But, when i set the localization to other language to japanese(say) then what should i do to launch the on screen key board with keys appearing in japanese language.

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  • How to extract List<int> from Dictionary<int, string>?

    - by DaveDev
    I have a method that takes a List<int>, which is a list of IDs. The source of my data is a Dictionary<int, string> where the integers are what I want a list of. Is there a better way to get this than the following code? var list = new List<int>(); foreach (var kvp in myDictionary) { list.Add(pair.Key); } ExecuteMyMethod(list);

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  • What does ON [PRIMARY] mean?

    - by Icono123
    I'm creating an SQL setup script and I'm using someone else's script as an example. Here's an example of the script: SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO CREATE TABLE [dbo].[be_Categories]( [CategoryID] [uniqueidentifier] ROWGUIDCOL NOT NULL CONSTRAINT [DF_be_Categories_CategoryID] DEFAULT (newid()), [CategoryName] [nvarchar](50) NULL, [Description] [nvarchar](200) NULL, [ParentID] [uniqueidentifier] NULL, CONSTRAINT [PK_be_Categories] PRIMARY KEY CLUSTERED ( [CategoryID] ASC )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] ) ON [PRIMARY] GO Does anyone know what the ON [PRIMARY] command does? Regards.

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  • Eclipse Style Navigation In VS.Net 2008 IDE

    - by Lennie
    Hi, I'm a Java developer starting with .Net development using VS.Net 2008. I would love to get the Eclipse style of navigating methods etc by pressing the Ctrl key, hover over a method then click it to got to that method's declaration. Does such a plugin exist for VS.Net 2008? thanks

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