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  • Simple Hexadecimal color question

    - by M28
    I have a number between 0.0 and 1.0, I would like to convert it to a grayscale color. White = 0 Black = 1 You can show me how in any understandable language (I prefer actionscript 3) Please, don't just give a name of a function that a language have to do this, I want to know how it does.

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  • How to run SQL that contains bind variables in the ODT Query Window?

    - by dnorthut
    How do you run SQL that contains one or more bind variables in the Oracle Developer Tools for Visual Studio Query Window? For example, the following works fine in SQL*Plus: variable x NUMBER; BEGIN :x := 0; END; / SELECT 1 FROM DUAL WHERE :x <> 1; When executed in the ODT Query Window, the following exception is raised in the Query output pane: ERROR ORA-01008: not all variables bound

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  • In SQL Server changing column varchar(255) nvarchar

    - by JD
    Hi, I am using SQL server 2008 express and some of our columns are defined as varchar(255). Should I convert these columns to NvarChar(255) or nvarchar(max)? The reason I ask is I read that nvarchar(255) for unicode characters would actually store 1/2 the number of characters (since unicode characters are 2 bytes) whereas 255 with varchar() would allow me to store 255 characters (or is it 255 - 2 for the offset). Would there be any performance hits using nvarchar(max)? JDs

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  • How to add values dynamically to I18n?

    - by Dima Goltsman
    I have many ymls in my rails app, and i want to put some of them in other service, so that i can call this from multiple places. the response of this call will be a hash. {"en" : {"test" : {"text1" : "hi english"}, {"text2" : "mambo number %{num}"} }, "es" : {"test" : {"text1" : "hi espaniol"}, {"text2" : "mamboes numeros %{num}"} } } is there a way i can load that hash into I18n translations like I18n.add_translations(some_hash) so i can access them with I18n.t("test.text1") I18n.t("test.text2", :num => 5) how can i achieve it?

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  • Serving wildcard subdomains from the mulitple servers.

    - by user489176
    I have a web application to which I want users to login only through their unique sub-domain (the sub-domain will be chosen at signup). So that I can scale the application across a number of servers, what would be the best way to set up Apache to always serve the same subdomains from the same server? For instance: matt.yyy.com, helen.yyy.com, terry.yyy.com are always served from server with ip of xxx.xxx.xxx.xxx suzi.yyy.com, fred.yyy.com, tom.yyy.com are always served from server with ip of xxx.xxx.xxx.xxx

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  • Question on Addressing Modes in PDP-11 Assembler

    - by lego69
    I have small question about pdp-11(simulator), I have this command (it begins from the address 1000) add 2500, #2500 and this initial list: register/address - initial value pc 1000 sp 600 2500 3000 and I want to know how this small snippet exactly runs, in my booklet I found that: firstly it reads inforamtion from the address 1000, inside this address we have value 066727, after we read number from the address 1002, AND VALUE MUST BE 2500(because of add 2500, #2500), but in my booklet I have 1474 without any explanations why, I know that I have here relative addressing mode, but why 1474 inside the address 1002 and not 2500, thanks in advance for any help

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  • Porting a Grails application to GAE

    - by xain
    Hi, I currently have a Grails application I'm evaluating to port to Google App Engine and I'd like to know experiences regarding: Acegi security: the application relies on this library to enforce the security. Use of JPA or JDO instead of the hibernate plugin (I'll have to migrate the Domain classes); which one is better ? I have a growing number of pre-generated pdf files I keep uploading; is there any foreseeable problem with this? Thanks in advance.

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  • How to put an InlineFormSet into a ModelFormSet in Django?

    - by Jannis
    Hi, I'd like to display a number of forms via a ModelFormSet where each one of the forms displays in turn InlineFormSets for all objects connected to the object. Now I'm not really sure how to provide the instances for each ModelFormSet. I thought about subclassing BaseModelFormSet but I have no clue on where to start and would like to know whether this is possible at all before I go through all the trouble. Thanks in advance!

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  • What is the minimum interface that has the Count property in .Net

    - by SoMoS
    Hello, I need to change a method that has one parameter that takes a serie of objects. I need to find the lowest Interface (in inheritance tree) that has the Count property. Until now I was using the IEnumerable but as this has not Count I need to change it to the wider interface possible so the method can work with the biggest number of types of series (collections, lists, arrays, etc). Thanks in advance.

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  • Checking if an int is prime more efficiently

    - by SipSop
    I recently was part of a small java programming competition at my school. My partner and I have just finished our first pure oop class and most of the questions were out of our league so we settled on this one (and I am paraphrasing somewhat): "given an input integer n return the next int that is prime and its reverse is also prime for example if n = 18 your program should print 31" because 31 and 13 are both prime. Your .class file would then have a test case of all the possible numbers from 1-2,000,000,000 passed to it and it had to return the correct answer within 10 seconds to be considered valid. We found a solution but with larger test cases it would take longer than 10 seconds. I am fairly certain there is a way to move the range of looping from n,..2,000,000,000 down as the likely hood of needing to loop that far when n is a low number is small, but either way we broke the loop when a number is prime under both conditions is found. At first we were looping from 2,..n no matter how large it was then i remembered the rule about only looping to the square root of n. Any suggestions on how to make my program more efficient? I have had no classes dealing with complexity analysis of algorithms. Here is our attempt. public class P3 { public static void main(String[] args){ long loop = 2000000000; long n = Integer.parseInt(args[0]); for(long i = n; i<loop; i++) { String s = i +""; String r = ""; for(int j = s.length()-1; j>=0; j--) r = r + s.charAt(j); if(prime(i) && prime(Long.parseLong(r))) { System.out.println(i); break; } } System.out.println("#"); } public static boolean prime(long p){ for(int i = 2; i<(int)Math.sqrt(p); i++) { if(p%i==0) return false; } return true; } } ps sorry if i did the formatting for code wrong this is my first time posting here. Also the output had to have a '#' after each line thats what the line after the loop is about Thanks for any help you guys offer!!!

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  • Interesting issue with ScriptManager timeout value happens only in win2k machines

    - by jg
    When I set the Asyncpostbacktimeout value to a large value like 3600000000, the scriptmanager throws a timeout exception (it throws the error almost immediately after user action which triggers ajax request, so it is not timing out because the server is not responding). If I reset this value to some sane number like 3600 or even 36000, it works fine. AJAx content is getting updated in the page. This weirdness happens only in windows 2000 machines and does not happen in XP machines Any thoughts ?

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  • How to use Delphi's AsCurrency to show currency without currency symbol?

    - by croceldon
    I'm trying to display a currency value in a grid, but I do not want the currency symbol to be shown: if fPreferences.WorksheetFormat = 'Numeric' then begin CurrencyString := ''; Value := FieldByName('UnitList').AsCurrency; end else Value := CurrToStrF(FieldByName('UnitList').AsCurrency, ffCurrency, 2, langFormat); The problem is that it's still showing the currency symbol. What am I doing wrong here? I don't think I can use CurrToStrF, because I need the grid to export a number to excel, not a string.

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  • How to embed a hgactivity graph in hgweb

    - by Ton
    I would like to embed an actity graph created by hgactivity inside my hgweb webinterface. What's the best method to do so. Here's a screenshot of a hgactivity graph: It shows the number of commits through time to a Mercurial repository.

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  • jpa @version optimistic locking

    - by cometta
    I loaded same entity record on 2 separate browser window then press submit (hibernate template.merge), version number incremented for both browser window, but never caught any problem with optimistic lock.. so how to test this? my save() look like this hibernatetemplate().merge(..); setJPAObject(null); //reset after save

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  • How to format and add new numbers dynamically to hidden field?

    - by Bartek
    I get from server into client side only pure number IDs, how to add dynamically it to html hidden field so that looks like array or JSON format (I mean: ["32","33","34"]), so that in next step I can receive on serwer and parse? Hidden field contains on start only blank brackets []. My current code override hidden field from [] to e.g. "32": $("#myHiddenField").val(JSON.stringify(data.result[0].newid));

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  • NAN mixing float and GLFloat?

    - by carrots
    This often returns NAN ("Not A Number") depending on input: #define PI 3.1415f GLfloat sineEaseIn(GLfloat ratio) { return 1.0f-cosf(ratio * (PI / 2.0f)); } I tried making PI a few digits smaller to see if that would help. No dice. Then I thought it might be a datatype mismatch, but float and glfloat seem to be equivalent: gl.h typedef float GLfloat; math.h extern float cosf( float ); Is this a casting issue?

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