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  • Multiple database accesses or one massive access?

    - by DudeOnRock
    What is a better approach when it comes to performance and optimal resource utilization: accessing a database multiple times through AJAX to only get the exact information needed when it is needed, or performing one access to retrieve an object that holds all information that might be needed, with a high probability that not all is actually needed? I know how to benchmark the actual queries, but I don't know how to test what is best when it comes to database performance when thousands of users are accessing the database simultaneously and how connection pooling comes into play.

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  • Should I use multiple column primary keys or add a new column?

    - by Covar
    My current database design makes use of a multiple column primary key to use existing data (that would be unique anyway) instead of creating an additional column assigning each entry an arbitrary key. I know that this is allowed, but was wondering if this is a practice that I might want to use cautiously and possibly avoid (much like goto in C). So what are some of the disadvantages I might see in this approach or reasons I might want a single column key?

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  • Determining whether a visitor reached two different pages in one visit

    - by Shaun
    I have a funnel that I would like to track. Tracking this funnel won't work with the default "goal funnel" tracking in Google due to the fact that I am mixing events and pageviews. As such, I've created a series of reports: Visits to demo pages - An inclusion filter on "Page". Triggers an Event on these pages - An inclusion filter on "Page" and "Event Category". Does not bounce - An inclusion filter on "Page" and an exclusion filter on "Exit Page" for these same pages. Reach our storefront - ?? Purchase something - An inclusion filter on "Page" and a report that shows "Transactions". At a basic level, I need to track users who reached demo pages, then reached any page on our store. Intuitively, I created a segment, used two inclusive "Page" filters (one for the demo pages and one for any page in our store), and combined them with an "AND" operator. I thought this was working until I tried to do the same thing in a dashboard widget and on a custom report. When I tried the same thing in those areas, I got zero results. I figured this might be because widgets and custom report filters function differently from segment filters (the options are different for all of them), so I tried applying my "demo page && store page" segment to a report that gave me a general page list. All I saw was a list of the specific pages. I tried simplifying things by creating a custom report that showed all visits to store pages, then applied a segment that filtered for users who visited demo pages. This got me the same numbers as my "demo page && store page" segment, but showed a list of demo pages. This has led me to believe that the "demo page && store page segment" approach and the "demo segment && store report" functionally behave the same. However, this experience has left me questioning whether they're giving me what I want. Are these methods showing me all users who reached both sets of pages? Is there a better/easier/more standard way of doing this aside from looking at visitor flow reports? I'm trying to avoid a combination of custom variables/events and using the horizontal funnel approach since it would consume a large number of our limited goals and seems more complicated than is necessary for tracking this funnel.

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  • F# and the useful infinite Sequence (I think)

    - by MarkPearl
    So I have seen a few posts done by other F# fans on solving project Euler problems. They looked really interesting and I thought with my limited knowledge of F# I would attempt a few and the first one I had a look at was problem 5. Which said : “2520 is the smallest number that can be divided by each of the numbers from 1 to 10 without any remainder. What is the smallest number that is evenly divisible by all of the numbers from 1 to 20?” So I jumped into coding it and straight away got stuck – the C# programmer in me wants to do a loop, starting at one and dividing every number by 1 to 20 to see if they all divide and once a match is found, there is your solution. Obviously not the most elegant way but a good old brute force approach. However I am pretty sure this would not be the F# way…. So after a bit of research I found the Sequences and how useful they were. Sequences seemed like the beginning of an approach to solve my problem. In my head I thought - create a sequence, and then start at the beginning of it and move through it till you find a value that is divisible by 1 to 20. Sounds reasonable? So the question is begged - how would you create a sequence that you are sure will be large enough to hold the solution to the problem? Well… You can’t know! Some more googling and I found what I would call infinite sequences – something that looks like this… let nums = 1 |> Seq.unfold (fun i -> Some (i, i + 1))   My interpretation of this would be as follows… create a sequence, and whenever it is called add 1 to its size (I would appreciate someone helping me on wording this right functionally). Something that I don’t understand fully yet is the forward pipe operator (|>) which I think plays a key role in this code. With this in hand I was able to code a basic optimized solution to this problem. I’m going to go over it some more before I post the full code just in case!

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  • Is it ok to nofollow all outbound links? [duplicate]

    - by Noam
    This question already has an answer here: Could globally applying rel=“nofollow” to external links have a negative SEO impact 1 answer I'm currently adding a nofollow to almost all of my outbound links thinking this will keep the PR inside my domain. Is this a bad approach?

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  • TechEd 2014 Day 1

    - by John Paul Cook
    Today at TechEd 2014, many people had questions about the in-memory database features in SQL Server 2014. A common question is how an in-memory database is different from having a database on a SQL Server with an amount of ram far greater than the size of the database. In-memory or memory optimized tables have different data structures and are accessed differently using a latch free and lock free approach that greatly improves performance. This provides part of the performance improvement. The rest...(read more)

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  • Object Oriented Design of a Small Java Game

    - by user2733436
    This is the problem i am dealing with. I have to make a simple game of NIM. I am learning java using a book so far i have only coded programs that deal with 2 classes. This program would have about 4 classes i guess including the main class. My problem is i am having a difficult time designing classes how they will interact with each other. I really want to think and use a object oriented approach. So the first thing i did was design the Pile CLASS as it seemed the easiest and made the most sense to me in terms of what methods go in it. Here is what i have got down for the Pile Class so far. package Nim; import java.util.Random; public class Pile { private int initialSize; public Pile(){ } Random rand = new Random(); public void setPile(){ initialSize = (rand.nextInt(100-10)+10); } public void reducePile(int x){ initialSize = initialSize - x; } public int getPile(){ return initialSize; } public boolean hasStick(){ if(initialSize>0){ return true; } else { return false; } } } Now i need help in designing the Player Class. By that i mean i am not asking for anyone to write code for me as that defeats the purpose of learning i was just wondering how would i design the player class and what would go on it. My guess is that the player class would contain method for choosing move for computer and also receiving the move human user makes. Lastly i am guessing in the Game class i am guessing the turns would be handeled. I am really lost right now so i was wondering if someone can help me think through this problem it would be great. Starting with the player class would be appreciated. I know there are some solutions for this problem online but i refuse to look at because i want to develop my own approach to such problems and i am confident if i can get through this problem i can solve other problems. I apologize if this question is a bit poor but in specific i need help in designing the Player class.

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  • Syncing apt-get installations between multiple computers

    - by Chris
    Is there a way to synchronize my installations (and removals) between multiple PCs? Preferably with dropbox - since I'm already using that to keep my files in sync. Edit: I thought of an alias for the apt-get install and apt-get remove commands that stores the parameters to a file (one for install, one for remove) and another command that reads all the entries in the file and executes the respective command. Is this an realistic approach?

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  • Store image as logic file (in db by using binary format) or physical file (in the server)

    - by Michel Ayres
    In those study cases of image storage, An image that change only once in a while, if it changes at all (like an image for an article) The image case from above is not only one image but over 10, that link to the same article An image that have changes very often (like a banner image for a website) The image above is huge What is the best approach for each case? What is the "right/faster" way to do this task in each scenario ?

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  • Productivity strategies for one developer using many PCs

    - by DeveloperDon
    In a talk about time management, a famous computer scientist said: "One machine in your life is the right number." He recommended a laptop with a docking station. After trying this approach for about a month, I miss my more powerful desktop (i7 quad core hyperthread), but it is not in my technology road map (or budget) to upgrade from my old Intel Core 2 Duo (2006) notebook this year. What strategies can help me use the desktop while at my desk and without much manual effort the notebook when I am on the go?

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  • The Most Recent Aspects of Custom Web Application Development

    In today's untainted playing environment, a playing cannot meet some hiatus by insightful a watch-and-follow approach. The policy makers of every modern-day covering operation playing prerequisite to find dependable that scheme covering strategies are thoughtfully designed and implemented, in visit to meet aweigh of the rivalry and times.

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  • Search Engine Optimization on a Shoe String Budget (aka DIY SEO) - Part I

    SEO is critical to having your small/local business being found online. There are services out there that charge hundreds or even thousands of dollars a month for this service and frankly many of them are worth that and more for the qualified leads they help send your way. However for the small business person there often is no budget for this so they have to have a more DIY (do it yourself) approach at the start. This article is the first in a series that outlines some basics before you start spending money.

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  • EMEA Hardware: Quarterly Partner Sales Update Roadshow

    - by Cinzia Mascanzoni
    Starting July this year Oracle’s A&C, Partner Enablement and Hardware Teams will be organizing quarterly face-to-face sales training events to keep you up to date with Hardware sales news, latest products and solutions announcements, competitive positioning, sales tools -- all of this with an Oracle-on-Oracle approach. We are pleased to invite you to attend the first Oracle EMEA Hardware Quarterly Partner Sales Update Roadshow running in 10 different cities across EMEA. Click here for Dates & Location, Agenda and to Register.

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  • Recommended readings for a sofware construction mini-course [on hold]

    - by Aivar
    I'm going to organize a mini-course for CS students who have completed CS1 (Python) and CS2 (Java). I'd like to show them more principled approach to programming practice and design, something along the lines of McConnel's Code Complete. If I had enough copies of Code Complete, I would assign some readings from that book. Can you recommend some freely available material (books, blog posts, articles, essays) for such a course? (I'd prefer to avoid topics specific to OOP and focus on more universal principles.)

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  • SEO, The Techniques And Tools

    SEO or search engine optimization is one of the most widely used types of Internet marketing across the industry. It is a technique similar in approach with SEM or search engine marketing (in which b... [Author: Margarette Mcbride - Web Design and Development - May 30, 2010]

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  • Android real time multiplayer over LAN

    - by Heigo
    I've developed several games for the android platform and now planning to create my first multiplayer game. What I have in mind is basically just a 2-player game witch you can play with 2 phones over local area connection/WiFi. Both phones need to be able to pass 3 integer values to the other phone in real time. So far I have considered using Socket's, but before I dig into it too deep I wanted to ask if there might be a better approach? Thanks!

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  • Shows how to use the new Tasks namespace to download multiple documents in parallel.

    In C# 4.0, Task parallelism is the lowest-level approach to parallelization with PFX. The classes for working at this level are defined in the System.Threading.Tasks namespace.  read moreBy Peter BrombergDid you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Introduction to Master Data Services in SQL Server 2008

    There are numerous databases housing the same information and it's getting quite difficult to keep everything in line. I've heard from a number of departments who want a more centralized approach to handling customer data, but I don't know where to begin. Can you steer me in the right direction?

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  • Fusion Product Hub for Supply Chain Management

    Oracle Fusion Product Hub is a key component of Oracle's Supply Chain and Master Data Management strategy. Using a revolutionary approach to managing product master data management processes, Product Hub delivers: 1) A unified and accurate product definition that is harmonized within and across the enterprise value chain 2) Flexible and robust Data Governance workflows and policies to govern product master data 3) Product Dashboard and Embedded Analytics to enable informed and quick decisions

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