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  • Entity Relationships - Can a weak entity take part in a 'one to many' relationship as the 'one'

    - by jonos
    Hi, With the following entity relationship structure I'm struggling to figure out if the relationship between the LOAN and ITEM is valid? The weak entity of Loan uses a partial key of 'loan_dateLeant' and the primary keys from CUSTOMER and ITEM to form its primary key. However LOAN has a 'one to many' relationship with ITEM as a loan can consist of more than one item. But surely this means that if more than one item is loaned, then the loan record will have two item_id values for part of its primary key?

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  • How to optimize foreach loop in PHP

    - by vanneto
    First off, I know the title is generic and not fitting. I just couldn't think of a title that could describe my problem. I have a table Recipients in MySQL structured like this: id | email | status 1 foo@bar S 2 bar@baz S 3 abc@def R 4 sta@cko B I need to convert the data into the following XML, depending on the status field. For example: <Recipients> <RecipientsSent> <!-- Have the 'S' status --> <recipient>foo@bar</recipient> <recipient>bar@baz</recipient> </RecipientsSent> <RecipientsRegexError> <recipient>abc@def</recipient> </RecipientsRegexError> <RecipientsBlocked> <recipient>sta@cko</recipient> </RecipientsBlocked> </Recipients> I have this PHP code to implement this ($recipients contains an associative array of the db table): <Recipients> <RecipientsSent> <?php foreach ($recipients as $recipient): if ($recipient['status'] == 'S'): echo "<recipient>" . $recipient['email'] . "</recipient>"; endif; endforeach; ?> </RecipientsSent> <RecipientsRegexError> <?php foreach ($recipients as $recipient): if ($recipient['status'] == 'R'): echo "<recipient>" . $recipient['email'] . "</recipient>"; endif; endforeach; ?> </RecipientsRegexError> <?php /** same loop for the B status */ ?> </Recipients> So, this means that if I have 1000 entries in the table and 4 different status' that can be checked, it means that there will be 4 loops, each one executing 1000 times. How can this be done in a more efficient manner? I thought about fetching four different sets from the database, meaning 4 different queries, would that be more efficient? I'm thinking it could be done with one loop but but I can't come up with a solution. Any way this could be done with only one loop?

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  • problem with IN clause in SQL

    - by user179056
    Hello, We have observed that there seems to be a maximum number of ids/variables which one can pass in the IN clause of SQL as comma seperated values. To avoid this we are storing all the ids in a table and doing a SELECT within the IN clause. This however means extra database operations to store and retrieve ids. Is there any other way to use IN without SELECT? regards Sameer

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  • How to know when an upload is done?

    - by mr1031011
    I'm using Guzzle 4 (latest version) to upload file to a remote server, since it uses stream to upload the $response-getStatusCode() will be 100 which means "Continue" and the responseBody is not available at this point. Is there a way to catch the remote server response when the upload is done? Edit 1: I was able to call back to a function when the upload is done using this: https://github.com/guzzle/progress-subscriber However, I haven't found out how to get the response yet

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  • Remove Chrome Loading Notification?

    - by Yottagray
    I am working on a project that runs in Chrome in full-screen mode and displays data that can be edited and interacted with. It makes AJAX calls(using jQuery) frequently that cause a loading notification in the lower left-hand corner on the bottom of the screen to pop up. These notifications are distracting when you are viewing the display and I would like to remove/prevent Chrome from displaying these loading notifications at all. Is it possible to prevent these notification by any means, or perhaps even mask the javascript that causes these notifications?

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  • Configuration manipulation over all Visual Studio projects

    - by rodnower
    Hello, some one know how can I manipulate on some configuration over all projects in solution? For example, I create new configuration "Releas64" that means: "No debug, 64 bit, all files goes to c:\binaries", but I need to go over all 30 projects in our solution for to set those settings for every project. Is there some tool? Thank you for ahead.

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  • jquery :has check for images then apply css

    - by sp-1986
    If relatedProductsArea contains NO images then HIDE the div. <div id="RelatedProductsArea" style="border-radius: 7px 7px 7px 7px;"><br clear="all"><div style="clear:both;"></div> </div> Finding NO images means there are no related products. What i have tried: $('#RelatedProductsArea').has('img').css('border', 'none'); Heres an example: http://jsfiddle.net/K2Cp6/

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  • Types in a struct in C

    - by drigoSkalWalker
    In this article : http://publib.boulder.ibm.com/infocenter/macxhelp/v6v81/index.jsp?topic=/com.ibm.vacpp6m.doc/language/ref/clrc03defst.htm What's means the sentence "In C, a structure member may be of any type except "function returning T" (for some type T)" Thanks for all the answers!

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  • C++ variable alias - what's that exactly, and why is it better to turn if off?

    - by Poni
    I've read the essay Surviving the Release Version. Under the "Aliasing bugs" clause it says: You can get tighter code if you tell the compiler that it can assume no aliasing.... I've also read Aliasing (computing). What exactly is a variable alias? I understand it means using a pointer to a variable is an alias, but, how/why does it affect badly, or in other words - why telling the compiler that it can assume no aliasing would get me a "tighter code"

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  • Moving from php to rails

    - by piemesons
    While moving from php to rails (Means procedural language to Object oriented language), what are the various things you should keep in mind. How to think in world of object oriented programming? What are thinks i should kept in mind before starting the things. Any tips?

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  • Websphre portal does not startup

    - by Kaushik
    When I try to start up a websphere portal server, it hangs at the line : Server WebSphere_Portal open for e-business and although it means that the server started up successfully, it is not...because in the progress bar, i stll see 'Starting.....' I have tried deleting the wstemp and temp directories but beyond that I am not sure what I can do to debug the problem. The server with the same profile starts up great from another workspace, but when I come to this workspace, it just hangs at Server WebSphere_Portal open for e-business I am using RAD 7 and portal 6.1

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  • Select the next N elements of an IEnumerable<T>

    - by sassafrass
    Say you've got some IEnumerable called S of length N. I would like to select all continuous subsequences of length n <= N from S. If S were, say, a string, this'd be pretty easy. There are (S.Length - n + 1) subsequences of length n. For example, "abcdefg" is length (7), so that means it has (5) substrings of length (3): "abc", "bcd", "cde", "def", "efg". But S could be any IEnumerable, so this route isn't open. How do I use extension methods to solve this?

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  • What is microbenchmarking?

    - by polygenelubricants
    I've heard this term used, but I'm not entirely sure what it means, so: What DOES it mean and what DOESN'T it mean? What are some examples of what IS and ISN'T microbenchmarking? What are the dangers of microbenchmarking and how do you avoid it? (or is it a good thing?)

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  • Specified argument was out of the range of valid values. Parameter name: utcDate

    - by Rob
    Our logs show hundreds of these errors after our deployment if users are on the site. Anyone know what this means and how to fix it? Notes: We are using msdeploy, IIS 6 I recently noticed that our web server's time is about 10 minutes behind the real time, I think that may have something to do with it. If I log into our site, seems like any file that depends on a WebResource or ScriptResource type file doesn't look right. Seems to fix itself after an IIS reset

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  • TCP Connection Persistent State

    - by TripShock
    Is there any field/option/anything that I can put in a TCP packet (be it a syn or an ack or just plain data) that I can be sure will be returned by the other end intact? For eg. I want to "tag" a particular connection (src, srcport, dst, dstport) with a number that I can always read from a packet belonging to that connection. That means I can identify the connection without using the 4-tuple (as given above).

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  • Best way to provide Excel like WebPage?

    - by pipelinecache
    Hi everyone, is there in any means a manner to show a grid or something like Excel. I see alot of information, but how do you feel about this one? Are there grids, or third party grid that provide these features? Thanks, I very like it to here your opinion, and your idea about this feature I want to provide in a Web Page?

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  • How to validate overlapping no in java

    - by anandhinaveen
    I Have dynamically render row. WE have fields like FROM TO. For eg: From TO 2 10, 2 3, 8 12 It cannot accept this combination row.. That means no number should be overlapping. For eg: From TO 2 10, 0 1, 11 12 This combination is allowed.the row may also increased. I need need to write a validation for this overlapping. Can any 1 help to solve this problem.

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  • Zend_Registry - Do you need getInstance() ?

    - by Jesse
    Hey I'm wondering when accessing Zend_Registry in an application if you need to include getInstance() and if so, why? for example Zend_Registry::getInstance()-get('db'); vs. Zend_Registry::get('db'); they both seem to work with the later being less verbose. I vaguely understand that Zend_Registry is a singleton, which I think means there can only be one instance of it? so why would you need getInstance()?

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  • Compact Framework Non Culture Specific Exception Messages

    - by Ian
    Hi Everyone, I have created an application in Compact Framework 2.0 This application is being used in many various counties and cultures. My Issue is that any and all exceptions are logged, but they are appearing in the culture of the device, in some cases this means i am unable to read them. Any help or suggestions will be appreciated Thanks

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