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  • Define Instance Variable Outside of Method Defenition (ruby)

    - by Ell
    Hi all, I am developing (well, trying to at least) a Game framework for the Ruby Gosu library. I have made a basic event system wherebye each Blocks::Event has a list of handlers and when the event is fired the methods are called. At the moment the way to implement an event is as follows: class TestClass attr_accessor :on_close def initialize @on_close = Blocks::Event.new end def close @on_close.fire(self, Blocks::OnCloseArgs.new) end end But this method of implementing events seems rather long, my question is, how can I make a way so that when one wants an event in a class, they can just do this class TestClass event :on_close def close @on_close.fire(self, Blocks::OnCloseArgs.new) end end Thanks in advance, ell.

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  • SVG: About using <defs> and <use> with variable text values

    - by Lukman
    Hi, I have the following SVG source code that generates a number of boxes with texts: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.0//EN" "http://www.w3.org/TR/2001/REC-SVG-20050904/DTD/svg11.dtd"> <svg xmlns="http://www.w3.org/2000/svg" version="1.1" xmlns:xlink="http://www.w3.org/1999/xlink" width="600" height="600"> <defs> </defs> <title>Draw</title> <g transform="translate(50,40)"> <rect width="80" height="30" x="0" y="-20" style="stroke: black; stroke-opacity: 1; stroke-width: 1; fill: #9dc2de" /> <text text-anchor="middle" x="40">Text</text> </g> <g transform="translate(150,40)"> <rect width="80" height="30" x="0" y="-20" style="stroke: black; stroke-opacity: 1; stroke-width: 1; fill: #9dc2de" /> <text text-anchor="middle" x="40">Text 2</text> </g> <g transform="translate(250,40)"> <rect width="80" height="30" x="0" y="-20" style="stroke: black; stroke-opacity: 1; stroke-width: 1; fill: #9dc2de" /> <text text-anchor="middle" x="40">Text 3</text> </g> </svg> As you can see, I repeated the <g></g> three times to get three such boxes, when SVG has <defs> and <use> elements that allow reusing elements using id references instead of repeating their definitions. Something like: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.0//EN" "http://www.w3.org/TR/2001/REC-SVG-20050904/DTD/svg11.dtd"> <svg xmlns="http://www.w3.org/2000/svg" version="1.1" xmlns:xlink="http://www.w3.org/1999/xlink" width="600" height="600"> <defs> <marker style="overflow:visible;fill:inherit;stroke:inherit" id="Arrow1Mend" refX="0.0" refY="0.0" orient="auto"> <path transform="scale(0.4) rotate(180) translate(20,0)" style="fill-rule:evenodd;stroke-width:2.0pt;marker-start:none;" d="M 0.0,-15.0 L -20.5,0.0 L 0.0,15.0 "/> </marker> <line marker-end="url(#Arrow1Mend)" id="systemthread" x1="40" y1="10" x2="40" y2="410" style="stroke: black; stroke-dasharray: 5, 5; stroke-width: 1; "/> </defs> <title>Draw</title> <use xlink:href="#systemthread" transform="translate(50,40)" /> <use xlink:href="#systemthread" transform="translate(150,40)" /> <use xlink:href="#systemthread" transform="translate(250,40)" /> </svg> Unfortunately I can't do this with the first SVG code since I need the texts to be different for each box, while the <use> tag simply duplicates 100% what's defined in <defs>. Is there any way to use <defs> and <use> with some kind of parameters/arguments mechanism like function calls?

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  • Unable to resolve user environment variable correctly

    - by Junaid
    I am trying to resolve %USERPROFILE% using WScript.Shell. When I create a vbs file and run directly from Windows, I get the correct path for the logged-in user C:\Documents and Settings\Administrator but it gets resolved to C:\Documents and Settings\Default User instead of logged-in user when I used it inside my classic ASP webapp running on the local machine on IIS. The code I used is as below var oShell = new ActiveXObject("Wscript.Shell"); var userPath = oShell.ExpandEnvironmentStrings("%USERPROFILE%"); Is there a permission/setting which I need to check to get correct value of USERPROFILE when retrieving value from the webapp? PS: I am using javascript to code.

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  • Image through Script, How to add variable to URL

    - by Liso22
    I'm sure it's pretty straightforward since someone just solved a similar problem I had. I have a folder full of city images and need users to see the image corresponding to their city. Right now I'm getting the users location without problem using "geoip_city()" but I don't quite know how to integrate it into the URL of the image. All images have the following format: New York.jpg, Boston.jpg so I just need to make the script put the location before .jpg This is what I'm trying now: <img src="blank.png" id="image" > <script type="text/javascript"> document.getElementById('image').src = "Imagenes/grupos/' + geoip_city() + '.jpg"; </script> I believe I'm just messing with the quotes or something similar. Could anyone tell me what I'm doing wrong? Also this is where I'm testing it: http://chusmix.com/?page_id=1770 Thanks

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  • SQL select row into a string variable without knowing columns

    - by Brandi
    Hello, I am new to writing SQL and would greatly appreciate help on this problem. :) I am trying to select an entire row into a string, preferably separated by a space or a comma. I would like to accomplish this in a generic way, without having to know specifics about the columns in the tables. What I would love to do is this: DECLARE @MyStringVar NVARCHAR(MAX) = '' @MyStringVar = SELECT * FROM MyTable WHERE ID = @ID AS STRING But what I ended up doing was this: DECLARE @MyStringVar = '' DECLARE @SecificField1 INT DECLARE @SpecificField2 NVARCHAR(255) DECLARE @SpecificField3 NVARCHAR(1000) ... SELECT @SpecificField1 = Field1, @SpecificField2 = Field2, @SpecificField3 = Field3 FROM MyTable WHERE ID = @ID SELECT @StringBuilder = @StringBuilder + CONVERT(nvarchar(10), @Field1) + ' ' + @Field2 + ' ' + @Field3 Yuck. :( I have seen some people post stuff about the COALESCE function, but again, I haven't seen anyone use it without specific column names. Also, I was thinking, perhaps there is a way to use the column names dynamically getting them by: SELECT [COLUMN_NAME] FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'MyTable' It really doesn't seem like this should be so complicated. :( What I did works for now, but thanks ahead of time to anyone who can point me to a better solution. :) EDIT: Got it fixed, thanks to everyone who answered. :)

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  • Set a dropdown option to selected based on get variable in url in Razor MVC

    - by Mason240
    I have a dropdown menu in a GET form. When the user hits submit, they are directed to the same page and shown the form again. I would like to have the dropdown option the user displayed in the last page already selected. So for example: @Html.DropDownList("Type", null, "Type", new { @class = "sbox-input" } ) website.com/Search?Type="Beef" <select name="Type"> <option value="Fish" >Fish</option> <option value="Chicken" >Chicken</option> <option value="Beef" selected="selected">Beef</option> </select> A jQuery solution would work just as well.

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  • Call a constructor from variable arguments with PHP

    - by zneak
    Hello guys, I have a function that takes variadic arguments, that I obtain from func_get_args(). This function needs to call a constructor with those arguments. However, I don't know how to do it. With call_user_func, you can call functions with an array of arguments, but how would you call a constructor from it? I can't just pass the array of arguments to it; it must believe I've called it "normally". Thank you!

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  • Getting an Variable to Display at the top of an HTML Table Row

    - by John
    Hello, For the HTML table column below, the $count++ displays in the middle of the row. How can I get it to display at the top of the row? Thanks in advance, John Code: echo '<td class="commentnamecount">'.$count++.'.</td>'; CSS: .commentnamecount { width: 20px; overflow:hidden !important; color: #000000; vertical-align: }

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  • Creating an SQL variable character column > 255 characters supporting multiple databases

    - by Piers
    I have an application that stores data through an ODBC data source of the user's choosing. So far it has worked well on a range of database systems (e.g. JET, Oracle, SQL Server), as the SQL syntax is fairly simple. Now I am running into a problem where I need to store more than 255 characters in my strings. Previously I created the table using column type VARCHAR (255). Now if I try to create a table using, e.g. VARCHAR (512) then it falls over on Access databases. I know that I can use the MEMO type for Access, but this is non-standard SQL and will thus likely fail on other database systems (e.g. Oracle). Is there any widely supported SQL standard for creating text columns wider than 255 characters, or do I need to find another solution? The alternatives seem to me to be: 1) Profile the database system and customise the SQL CREATE TABLE command based on the database system. I don't like this as it defeats the purpose of using ODBC. 2) Add extra columns of 255 chars as required (e.g. LONGSTRING1, LONGSTRING2, ...) and concatenate after reading. I don't like this because it means the number of columns can vary between tables and it complicates read/write. Are there any other viable alternatives to these two options? Or is it possible to have an SQL compliant CREATE TABLE command supported by the majority of database vendors, that supports strings longer than 255 chars?

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  • Optimal two variable linear regression SQL statement

    - by Dave Jarvis
    Problem Am looking to apply the y = mx + b equation (where m is SLOPE, b is INTERCEPT) to a data set, which is retrieved as shown in the SQL code. The values from the (MySQL) query are: SLOPE = 0.0276653965651912 INTERCEPT = -57.2338357550468 SQL Code SELECT ((sum(t.YEAR) * sum(t.AMOUNT)) - (count(1) * sum(t.YEAR * t.AMOUNT))) / (power(sum(t.YEAR), 2) - count(1) * sum(power(t.YEAR, 2))) as SLOPE, ((sum( t.YEAR ) * sum( t.YEAR * t.AMOUNT )) - (sum( t.AMOUNT ) * sum(power(t.YEAR, 2)))) / (power(sum(t.YEAR), 2) - count(1) * sum(power(t.YEAR, 2))) as INTERCEPT FROM (SELECT D.AMOUNT, Y.YEAR FROM CITY C, STATION S, YEAR_REF Y, MONTH_REF M, DAILY D WHERE -- For a specific city ... -- C.ID = 8590 AND -- Find all the stations within a 5 unit radius ... -- SQRT( POW( C.LATITUDE - S.LATITUDE, 2 ) + POW( C.LONGITUDE - S.LONGITUDE, 2 ) ) <15 AND -- Gather all known years for that station ... -- S.STATION_DISTRICT_ID = Y.STATION_DISTRICT_ID AND -- The data before 1900 is shaky; and insufficient after 2009. -- Y.YEAR BETWEEN 1900 AND 2009 AND -- Filtered by all known months ... -- M.YEAR_REF_ID = Y.ID AND -- Whittled down by category ... -- M.CATEGORY_ID = '001' AND -- Into the valid daily climate data. -- M.ID = D.MONTH_REF_ID AND D.DAILY_FLAG_ID <> 'M' GROUP BY Y.YEAR ORDER BY Y.YEAR ) t Data The data is visualized here: Questions How do I return the y value against all rows without repeating the same query to collect and collate the data? That is, how do I "reuse" the list of t values? How would you change the query to eliminate outliers (at an 85% confidence interval)? The following results (to calculate the start and end points of the line) appear incorrect. Why are the results off by ~10 degrees (e.g., outliers skewing the data)? (1900 * 0.0276653965651912) + (-57.2338357550468) = -4.66958228 (2009 * 0.0276653965651912) + (-57.2338357550468) = -1.65405406 I would have expected the 1900 result to be around 10 (not -4.67) and the 2009 result to be around 11.50 (not -1.65). Thank you!

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  • how to create a changing variable for fsolve

    - by Shun Miyamoto
    i want fsolve to calculate the output for different uc each time (increasing uc by 0.001 each time). each output from fsolve should be sent to a simulink model seperatly. so i set a loop to do so, but i believe that at the currenty constellation (if it will work)will just calculate 1000 different values? is there a way to send out the values seperately? if not, how can i create a parameter uc. that goes from 0 to say 1000? i tried uc=0:0.001:1000, but again, the demension doen't seem to fit. how do i create a function that takes the next element of a vector/matrix each time the function is called? uc=0; for i=0:1000 x0=[1,1,1]; y=x0(1); u=x0(2); yc=x0(3); options=optimset('Display','off'); x= fsolve(@myfun,x0,options,uc,d,spacing_amplitude,spacing_width); end best regards

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  • a variable in HTML

    - by PurplePilot
    in the form action i have the following line\ <form action="{URL}" method="post" target="_self" id="xxx" name="xxx"> when rendered in the browser it becomes action="/abc/17224_pb/HTTP/index.php" this is just HTML. I cannot see anywhere the {URL} has been defined and anyway you cannot have variables in HTML (can you?) i thought it might be jquery but it would need to be in a script ?? Where does it come from? How is it defined? This code is not really in a framework but we do have some Zend framework code around.

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  • XSLT workflow with variable number of source files

    - by chiborg
    I have a bunch of XML files with a fixed, country-based naming schema: report_en.xml, report_de.xml, report_fr.xml, etc. Now I want to write an XSLT style sheet that reads each of these files via the document() XPath function, extracts some values and generates one XML files with a summary. My question is: How can I iterate over the source files without knowing the exact names of the files I will process? At the moment I'm planning to generate an auxiliary XML file that holds all the file names and use the auxiliary XML file in my stylesheet to iterate. The the file list will be generated with a small PHP or bash script. Are there better alternatives? I am aware of XProc, but investing much time into it is not an option for me at the moment. Maybe someone can post an XProc solution. Preferably the solution includes workflow steps where the reports are downloaded as HTML and tidied up :) I will be using Saxon as my XSLT processor, so if there are Saxon-specific extensions I can use, these would also be OK.

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  • golang closure variable scope

    - by waaadim
    I'm reading 'CreateSpace An Introduction to Programming in Go 2012' and on page 86 I found this evil magic func makeEvenGenerator() func() uint { i := uint(0) return func() (ret uint) { ret = i i += 2 return } } // here's how it's called nextEven := makeEvenGenerator() fmt.Println(nextEven()) fmt.Println(nextEven()) fmt.Println(nextEven()) 1) Why is i not resetting ? 2) is nextEven() returning and uint or is Println so smart that it can work with everything ?

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  • SQL Pivot table error-using variable gives syntax error

    - by Antoni
    Hi my coworker came to me with this error and now I am hooked and trying to figure it out, hope some of the experts can help us! Thanks so much! When I execute Step6 we get this error: Msg 102, Level 15, State 1, Line 4 Incorrect syntax near '@cols'. --Sample of pivot query --Creating Test Table Step1 CREATE TABLE Product(Cust VARCHAR(25), Product VARCHAR(20), QTY INT) GO -- Inserting Data into Table Step2 INSERT INTO Product(Cust, Product, QTY) VALUES('KATE','VEG',2) INSERT INTO Product(Cust, Product, QTY) VALUES('KATE','SODA',6) INSERT INTO Product(Cust, Product, QTY) VALUES('KATE','MILK',1) INSERT INTO Product(Cust, Product, QTY) VALUES('KATE','BEER',12) INSERT INTO Product(Cust, Product, QTY) VALUES('FRED','MILK',3) INSERT INTO Product(Cust, Product, QTY) VALUES('FRED','BEER',24) INSERT INTO Product(Cust, Product, QTY) VALUES('KATE','VEG',3) GO -- Selecting and checking entires in table Step3 SELECT * FROM Product GO -- Pivot Table ordered by PRODUCT Step4 select * FROM ( SELECT * FROM Product) up PIVOT (SUM(QTY) FOR CUST IN ([FRED], [KATE])) AS pvt ORDER BY PRODUCT GO --dynamic pivot???? Step5 DECLARE @cols NVARCHAR(2000) select @cols = STUFF(( SELECT DISTINCT TOP 100 PERCENT '],[' + b.Cust FROM (select top 100 Cust from tblProduct)b ORDER BY '],[' + b.Cust FOR XML PATH('') ), 1, 2, '') + ']' --Show Step6 SELECT * FROM (SELECT * FROM tblProduct) p PIVOT (SUM(QTY) FOR CUST IN (@cols)) as pvt Order by Product

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  • Regex for removing certain variable numeric values from some text

    - by stephemurdoch
    I want to substitute all 4 instances of the number 300 from the code below, with 470. <div> <object width="300" height="300"> <embed src="link-removed" width="300" height="300"></embed> </object> <p> <a href="another-link">link</a> </p> </div> The width and height of the code being pasted might not always be 300 by 300. So I figure I probably need a regular expression that subs any numeric value that follows the strings "width=" and "height=", whilst remembering to account for the quotations marks that surround the number. Can anyone tell me if that's the best way, and if so, what would be the best regex? In case it matters, the code being pasted is stored as "text" in the db rather than as a string, as it's quite lengthy (i've removed a few hundred chars from what you see pasted here)...

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  • TSQL: Global Script Variable?

    - by Abs
    Hello all, I am making use of variables in my TSQL queries. As my script has grown, I have separated each part by GO, now the problem is I need access to variables at the top of my script. How can I still access these variables? Hopefully, this is something simple and straightforward. Thanks all

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  • VS debugging and watching a variable for changes

    - by Shawn Mclean
    I have a property inside a class that is getting changed by something. The only place I change the value of this code is a line that looks like this: pushpin.Position.Altitude = -31; During visual studio debugging, is there a way to watch .Altitude for any changes made, preferably it breaks at the assignment statement that changes the value. If this is the correct way to track down this problem, could I have a step-by-step tutorial/instruction on how to do this? Thanks.

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