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  • Delphi, PGDac vs Zeos, Fetch, Lookup?

    - by durumdara
    Hi! I used Zeos to test to know: is ZTable uses fetch technics, or not? May in the future we migrate our lesser system to PGSQL, and this used now "Table" components (as BDE, but it have an SQL-like server). These tables use real cursors, a "Window" with N record, so lookup is very fast, because the Locate/Lookup is started on server, and only these N records are refreshed, no matter, how many records in the lookup table. PGSQL uses fetch technics as I know, and I tested it with a table (id int, name varchar(100)), and 1 million records. (I also trying this with mysql). The adapter is Zeos. ID, sec to find, allocated memory in bytes on client. MySQL 500000 2,761 113 196 344 1000000 3,214 225 471 232 313800 0,437 225 471 232 328066 0,468 225 471 232 276374 0,390 225 471 232 905984 1,264 225 471 232 260253 0,359 225 471 232 PGSQL 500000 3,042 113 188 184 1000000 3,744 225 463 064 313800 0,436 225 463 064 328066 0,452 225 463 064 276374 0,375 225 463 064 905984 1,295 225 463 064 260253 0,359 225 463 064 142023 0,203 225 463 064 As you see the records are fetched locally, this cause the 225 MB usage, and searches are slow a little, based where is the record we must find. I want to ask more things: a.) Is PGDAC have some technics to we can use the lookups without pay the fetch with memory and secs? b.) Or is PG ODBC driver can help in this problem with ADO? (As I know ADO can use server side cursors)? c.) Have anybody some experience with lookup tables, and performance? Is this critical question or it is not? (With client memory usage too). d.) If no chance to avoid fetch hell with lookups, what we can do? Server Side Joins, and unique code for Lookup field changing without real Lookup? Thanks for your help: dd

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  • local web application vs desktop application speed?

    - by Josh
    Which one would be faster - a local web app gui made with something like qooxdoo or a desktop app? How much speed difference would there be expected? I would prefer creating a web app which could in the future be shared than creating a desktop gui which is specialized on certain gui toolkits.

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  • Calling javascript class within other Js

    - by harigm
    I have Aptana plugin in eclipse, I have a javascript (one.js) and i have included one more Javscript(two.js) within one.js. I click on any functions within one.js and if those functions exists in the same one.js, the control is going to the respective function. Suppose if the function exists in two.js, the control is not going to two.js Can any one help me with this?

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  • Access to variables in an asp.net user control vs an include file

    - by user204588
    I've asked this question before but couldn't get the answer I was looking for so I'm going to try it again. I'm translating pages from old asp to asp.net and I don't want to do this any other way so I really just want to know if this can be done. In asp, I'd assign a variable on one page <% myVar = "something" %> I could assign many variables here and then use an include <!--#include file="Test2.aspx"--> then in test2 file, I could access all the variables without having to pass all the variables into the control or declaring them again, like <% myVar = "something else" %> I want to do this the dot net way but I have some thirty variables on the page and i don't want to pass a bunch into the user control and I don't want to have to keep declaring the same variables. All I really want to know is if there is some way to replicate the behavior above in asp.net?

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  • App.config vs. .ini files

    - by Jakob Gade
    I'm reviewing a .NET project, and I came across some pretty heavy usage of .ini files for configuration. I would much prefer to use app.config files instead, but before I jump in and make an issue out of this with the devs, I wonder if there are any valid reasons to favor .ini files over app.config?

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  • Getting a Method's Return Value in the VS Debugger

    - by Bullines
    Is it possible to get a method's return value in the Visual Studio debugger, even if that value isn't assigned to a local variable? For example, I'm debugging the following code: public string Foo(int valueIn) { if (valueIn > 100) return Proxy.Bar(valueIn); else return "Not enough"; } Since I'm not setting any local variables in Foo, and assuming I'm not setting a break point in whatever's calling Foo, is there a way to see what the return value is if I have a breakpoint inside of Foo (or another way)? I don't have much experience with the Autos or Intermediate windows, so I'm not sure if those are even a valid option or not.

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  • Hibernate mapping, on a unmapped class

    - by Jan
    Hi, I' ve got 2 tables... Challenge and ChallengeYear, ChallengeYear is only to create a list of years in challenge. I only want to make Challenge an entity, containing a list of List years. Is this possible? I've looked in to @SecondaryTable together with @JoinColumn and @OneToMany, but neither of those can do the trick, or i am overlooking something. Can someone help me? Greetings, Jan

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  • Maven "Module" vs "Project"

    - by Ricket
    I'm a beginner at Maven and I've played with it from a command line point of view a little, so now I was trying to use it in Eclipse; I installed the m2eclipse plugin to do so. But I'm stumped from the very beginning! Apparently I've missed a bit of terminology somewhere along the line. I can't keep track of all these new Maven terms... What is a Maven Project, and what is a Maven Module? These are my options when creating a new project in the Maven category in Eclipse.

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  • What is your ratio Bug fixing vs Enhancements ?

    - by Newtopian
    In the spirit of this question I wanted to have a sense of what is the proportion of time split between fixing bugs and implementing new features. If possible try to give an estimate for the product as a whole as opposed to individual developer stats and try to make an average over the course of a typical year. Do provide a general descriptive of the product/project to allow comparison. Specifically : Maturity of project Is it still actively developed or strictly in maintenance ? Size estimate of the product/project Size of team developing it (all inclusive) What is your team score on the Joel test. Ex : approx 80% time spent bug fixes 20% new stuff Mature software (20 years old) Actively developed 1.5M Line of Text, approx 700k - 900k LOC 12-15 actively coding in it. we got 5/12 for sure, some would say 7/12.

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  • Symfony/Doctrine: Unserialize in action vs template

    - by Tom
    Hi, Can anyone tell me why calling "unserialize" works fine in an action but gives an offset error in a template? It's basically possible to unserialize a database text result into a variable in an action and pass it to template, in which case it displays fine: $this->clean = unserialize($this->raw); <?php echo $clean ?> But not if called directly in a template: <?php echo unserialize($raw) ?> Would be interested in knowing why this is so and whether there's some workaround. Thanks.

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  • Dynamic find methods Vs conditional statements in rails

    - by piemesons
    Hello Student.find_all_by_name_and_status(‘mohit’, 1) As this will create a exception 'No method exception' first then it will be handled by dynamic Method handler and this will not Student.find(:all, :conditions => [‘name = ? and status = ?’ ‘mohit’, 1]) Does Student.find(1) Will generate method missing exception and will it prevent SQL injection?

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  • Throwing exception vs returning null value with switch statement

    - by Greg
    So I have function that formats a date to coerce to given enum DateType{CURRENT, START, END} what would be the best way to handling return value with cases that use switch statement public static String format(Date date, DateType datetype) { ..validation checks switch(datetype){ case CURRENT:{ return getFormattedDate(date, "yyyy-MM-dd hh:mm:ss"); } ... default:throw new ("Something strange happend"); } } OR throw excpetion at the end public static String format(Date date, DateType datetype) { ..validation checks switch(datetype){ case CURRENT:{ return getFormattedDate(date, "yyyy-MM-dd hh:mm:ss"); } ... } //It will never reach here, just to make compiler happy throw new IllegalArgumentException("Something strange happend"); } OR return null public static String format(Date date, DateType datetype) { ..validation checks switch(datetype){ case CURRENT:{ return getFormattedDate(date, "yyyy-MM-dd hh:mm:ss"); } ... } return null; } What would be the best practice here ? Also all the enum values will be handled in the case statement

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  • Sync Framework: SqlSyncProvider ItemConflicting vs ApplyChangeFailed

    - by Paul Smith
    I'm trying to use design a syncronisation application that syncs changes between different SQL Server databases. I came up with a design based around receiving the ItemConflicting event, storing the knowledge associated with the conflict, and resolving all conflicts off-line. However, it seems that I can only get the ApplyChangeFailed event to fire. Is there some reason why SqlSyncProvider does not use the ItemConflicting event? Am I just hooking up to the event wrongly? The reason I care is that the ItemConlficting event allows me to simply log the conflict and continue with the rest of the synchronisation in a way that I can't seem to achieve with the ApplychangeFailed event.

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  • Dependency Property Set Priority: CodeBehind vs. XAML

    - by LukePet
    When I initialize a control property from code, the binding to the same property defined on XAML don't work. Why? For Example, I set control properties on startup with this statements: myControl.SetValue(UIElement.VisibilityProperty, DefaultProp.Visibility); myControl.SetValue(UIElement.IsEnabledProperty, DefaultProp.IsEnabled); and on xaml I bind the property of myControl in this way: IsEnabled="{Binding Path=IsKeyControlEnabled}" now, when the property "IsKeyControlEnabled" changes to false, myControl remains enabled (because it's initialize with true value). How can I do?

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  • Parent class issue - UITableViewController doesn't work

    - by Darko Hebrang
    When I access my Search View from my tab bar, the view gets loaded when SearchViewController interface is set like this: @interface SearchViewController : UIViewController but it crashes when I set it like this (although it doesn't crash when it is not accessed through the tab bar): @interface SearchViewController : UITableViewController Why? I need the UITableViewController as I have a table view that I access from the tab bar.

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  • int vs size_t on 64bit

    - by MK
    Porting code from 32bit to 64bit. Lots of places with int len = strlen(pstr); These all generate warnings now because strlen() returns size_t which is 64bit and int is still 32bit. So I've been replacing them with size_t len = strlen(pstr); But I just realized that this is not safe, as size_t is unsigned and it can be treated as signed by the code (I actually ran into one case where it caused a problem, thank you, unit tests!). Blindly casting strlen return to (int) feels dirty. Or maybe it shouldn't? So the question is: is there an elegant solution for this? I probably have a thousand lines of code like that in the codebase; I can't manually check each one of them and the test coverage is currently somewhere between 0.01 and 0.001%.

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  • BackgroundWorker vs background Thread

    - by freddy smith
    I have a stylistic question about the choice of background thread implementation I should use on a windows form app. Currently I have a BackgroundWorker on a form that has an infinite (while(true)) loop. In this loop I use WaitHandle.WaitAny to keep the thread snoozing until something of interest happens. One of the event handles I wait on is a "stopthread" event so that I can break out of the loop. This event is signaled when from my overridden Form.Dispose(). I read somewhere that BackgroundWorker is really intended for operations that you dont want to tie up the UI with and have an finite end - like downloading a file, or processing a sequence of items. In this case the "end" is unknown and only when the window is closed. Therefore would it be more appropriate for me to use a background Thread instead of BackgroundWorker for this purpose?

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  • VS 2010 Layer Diagram Validation Error is Showing A Dependency That Doesn't Even Exist (AV0001)

    - by Dan
    I'm getting the following validation error on my layer diagram Error 65 AV0001 : Invalid Dependency : Weld.Interface.Core(Assembly) -- Weld.Interface(Namespace) Layers: Application Framework Core, Application Framework | Dependencies: Namespace Reference D:\Projects\Windows Projects\Weld\Weld\ModelingProject1\Weld.layerdiagram 0 0 ModelingProject1 Weld.Interface.Core: This assembly and namespace does not have a reference to Weld.Interface and only references .NET Framework classes Weld.Interface: This assembly and namespace does not have a reference to Weld.Interface There is no dependancy between these two layers in the dependency diagram. I am confused why I am getting this error. No dependency in the project or code, and no dependency is even setup in the layer diagram. Somehow the Validation logic in the layer diagram is seeing a non existant dependency and saying it is an error. Any ideas what either I might have missed or what is causing this problem?

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  • How to do google webpage translate in a Java class

    - by Robert
    Hi,this is a follow-up question of mine. Suppose now I have a URL : http://www.baidu.com/s?bs=%B0%C2%B0%CD%C2%ED&f=8&wd=%B0%C2%B0%CD%C2%ED and it work perfectly by inputting it in the text field of google translate and select from "Chinese" to English. My question is ,suppose now I want to achieve this in Java, I would like to adopt "Process q=Runtime.getRuntime().exec( "cmd /c start +URL" approach to do this. Could I achieve that by simply concatenating the Google translate URL and the webpage URL? If yes,could you please elaborte,thanks.

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