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  • Swapping of columns in a file and remove duplicates

    - by LucaB
    Hi all i have a file like this: term1 term2 term3 term4 term2 term1 term5 term3 ..... ..... what i need to do is to remove duplicates in any order they appear, such as: term1 term2 and term2 term1 is a duplicate to me. It is a really long file, so I'm not sure what can be faster. Does anyone has an idea on how to do this? awk perhaps?

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  • Best way to detect duplicates when using Spring Hibernate Template

    - by Dean Povey
    We have an application which needs to detect duplicates in certain fields on create. We are using Hibernate as our persistence layer and using Spring's HibernateTemplate. My question is whether it is better to do so an upfront lookup for the item before creating, or to attempt to catch the DataIntegrityViolation exception and then check if this is caused by a duplicate entry.

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  • Counting words in a collection using LINQ

    - by icemanind
    Guys, I have a StringCollection object with 5 words in them. 3 of them are duplicate words. I am trying to create a LINQ query that will count how many unique words are in the collection and output them to to the console. So, for example, if my StringCollection has 'House', 'Car,'House','Dog', 'Cat', then it should output like this: House -- 2 Car -- 1 Dog -- 1 Cat -- 1 any ideas on how to create a LINQ query to do this?

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  • Are GUID primary keys bad in theory, or just practice?

    - by Yarin
    Whenever I design a database I automatically start with an auto-generating GUID primary key for each of my tables (excepting look-up tables) I know I'll never lose sleep over duplicate keys, merging tables, etc. To me it just makes sense philosophically that any given record should be unique across all domains, and that that uniqueness should be represented in a consistent way from table to table. I realize it will never be the most performant option, but putting performance aside, I'd like to know if there are philosophical arguments against this practice?

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  • Determine if it has been 6 months since birthday in c#

    - by Longball27
    Hi, Sorry if this is a duplicate, but i think I've seen enough of Google for one day! My application needs to adjust a clients current age by +0.5 if it has been 6 months since their birthday. The code should look something like this, but how many ticks would there be in 6 months? if (DateTime.Today - dateOfBirth.Date > new TimeSpan(6)) { adjust = 0.5M; } else { adjust = 0M; } Thanks in advance

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  • Logical equality in C

    - by andrew cooke
    [It seems odd this doesn't exist, so apologies in advance if it's a duplicate] I want to test for logical equality in C. In other words, I want to know whether two values would be equal if both were converted in the normal way associated with logical expressions. In C99, I think that (bool)a == (bool)b gives what I want. Is that correct? What is the normal way of writing this in traditional C?

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  • mysql multiple insert - what happens on error?

    - by aviv
    What happens in mysql multiple records insert during an error. I have a table: id | value 2 | 100 UNIQUE(id) Now i try to execute the query: INSERT INTO table(id, value) VALUES (1,10),(2,20),(3,30) I will get a duplicate-key error for the (2,20) BUT... Will the (1,10) get into the database? Will the (3,30) get into the database?

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  • I need to auto_increment a field in MySQL that is not primary key

    - by behrk2
    Hey everyone, Right now, I have a table whose primary key is an auto_increment field. However, I need to set the primary key as username, date (to ensure that there cannot be a duplicate username with a date). I need the auto_increment field, however, in order to make changes to row information (adding and deleting). What is normally done with this situation? Thanks!

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  • BizTalk 2009 Message error - The following procedure call failed...

    - by Muralidhar
    Very freequently the following error is getting logged into Application event logs on my BizTalk 2009 VM. But this error is inconsistent. Any clues? The following stored procedure call failed: " { call [dbo].bts_UpdateMsgbox_BizTalkServerApplication}". SQL Server returned error string: "Warning: The join order has been enforced because a local join hint is used.;Warning: The join order has been enforced because a local join hint is used.;Duplicate key was ignored.".

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  • Facade controller, is it efficient?

    - by Berlioz
    Using a facade controller pattern in .net. It seems as if though it is not efficient BECAUSE, for every event that happens in a domain object(Sales, Register, Schedule, Car) it has to be subscribed to by the controller(use case controller) and then the controller in turn has to duplicate that same event to make it available for the presentation, so that the presentation can show it to the user. Does this make sense? Please comment!

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  • Modular GWT design concerns

    - by GlGuru
    Hi, I have a couple of questions regarding a modular GWT based application framework. I have some ideas about them but being new to the field of web development I feel they are far from ideal. I'd appreciate a few comments and suggestions in this regard. Here are my questions: I am developing a framework which will allow third parties to embed GWT applications into our website and do some communication with them using simple iFrame postMessage. All these third party modules are going to use our SDK which is also GWT based. The problem arises that even though all the modules will be using the same codebase there is going to be a massive overheard in the amount of duplicate Javascript code (i.e. our common SDK code base which is quite large) being downloaded on the client's machine. This is highly redundant and problematic, not only due to the sheer size of duplicate code but, also due to the fact that subsequent updates of the SDK would require the modules to be recompiled which is going to create a DLL hell kind of scenario in the long run. What is the best way of doing this kind of thing? Is there a way where I can have some static GWT code (i.e. the SDK) and the dynamic GWT module refers to it (even if lies on a different domain) and it all work happily? The other part of the problem lies in providing robust scripting front end to the SDK. At first it appears to be trivial since Javascript itself is a scripting language. However, I do not know how to load and call a piece of pure Javascript code at runtime? I am willing to put restrictions on the target Javascript (i.e. having a function main and unique namespace or something). Furthermore the Javascript will come as a string from a database and not as a full URL. If its doable in Javascript how does one get this right in GWT i.e. forcing the compiler to emit a certain function in the generated Javascript? This I believe can be lesser of a problem by having a stub Javascript with all the right requirements which just loads up a GWT generated Javascript. Is any of this possible at all? I generally hate to be this verbose but I hope to find a quick solution to the problem as its holding up my progress. I'd highly appreciate any comments, suggestions and experiences.

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  • How to "merge" page "\Default.aspx" and "\"?

    - by IrenaB
    our site is developed in ASP.NET. We want to block Default.aspx page from Google and other search engines. How can we "close" the Default.aspx page so that it is not accessible? Or is there another way to solve the problem so that we don't create duplicate content.

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  • Remove trailing slash with htaccess but preserve query string

    - by soundseller
    I am using following directives in my htaccess to remove trailing slashs from my uris to prevent duplicate content. However these directives also remove any query string, that might be present. RewriteCond %{HTTP_HOST} ^(www.)?mydomain\com$ [NC] RewriteRule ^(.+)/$ http://www.mydomain.com/$1 [R=301,L] I'd like to know how to remove a potential trailing slash from my URI, but also preserve query strings.

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  • post increment vs pre increment [closed]

    - by mousey
    Possible Duplicate: Difference between i++ and ++i in a loop? Hi, Can some one please help me when to use pre increment or post increment in a for loop. I am getting the same results for both the loops! I also would like to know when and where to choose one between the two. Thanks in advance.

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  • how to generate a random String? in java

    - by chandra wibowo
    hi everyone, i have an object called Student, and it has studentName, studentId, studentAddress, etc. for the studentId, i have to generate random string consist of seven numeric charaters, eg. studentId = getRandomId(); studentId = "1234567" <-- from the random generator. and i have to make sure that there is no duplicate id. thanks in advance

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  • javascript multiple input textbox validation

    - by murugesan
    I have 'n' number of textbox on a form, after the user enters a value in a textbox, i need to validate its not a duplicate in the other textboxes. Ex : Textbox[0] : 1 Textbox[1] : 2 Textbox[2] : 3 Textbox[4] : 1 For this example it should alert saying that '1' have entered twice. Let me know what to be done.

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  • What is the purpose of "do!" notation in F#?

    - by Yacoder
    I'm a beginner in F#, so it's a simple question and maybe a duplicate, but I couldn't find the answer anywhere... I'm reading this LOGO DSL implementation and I don't understand, what is the meaning of the "do!" notation in here: this.Loaded.Add (fun _ -> async { do! Async.Sleep 200 for cmd in theDrawing do do! this.Execute(cmd) } |> Async.StartImmediate ) Can you help?

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