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Andrew Fuqua07/25/14
3457 views
0 replies

Compressed Backlog Refinement

This post is not about where the ideas come from or even about how to convert what already exists into user stories. The focus here is about how to conduct that initial refinement meeting, then what might be different in subsequent refinement sessions.

Matt Butcher07/25/14
3231 views
0 replies

9 Things I Like About Go

Here, in no particular order, are the top 9 reasons I like working with Go: The Toolchain, Clean Code, Go Routines, Channels, Metaphysical Parsimony, and 4 more...

Robert Diana07/25/14
2271 views
0 replies

Geek Reading July 24, 2014

These items are a combination of tech business news, development news and programming tools and techniques.

Gil Zilberfeld07/25/14
770 views
0 replies

Agile Practitioners 2015: Call For Papers

Agile Practitioners 2015 is starting its way, and the first step is the Call For Papers! The Agile Practitioners conference started 4 years ago, and is an actual effort by the community. I’m proud to be part of the organizing committee, after presenting at the last 3 gatherings.

Johanna Rothman07/24/14
4458 views
0 replies

How Pairing & Swarming Work & Why They Will Improve Your Products

If you’ve been paying attention to agile at all, you’ve heard these terms: pairing and swarming. But what do they mean? What’s the difference?

Alec Noller07/24/14
3879 views
0 replies

The Best of DZone: July 17 - 23

If you missed anything on DZone this week, now's your chance to catch up! This week's best include a Spring MVC 3 view controller example, a look at the new mobile database, Realm, the Java origins of AngularJS, 5 quick points about threads in Java EE, and more.

Adi Gaskell07/24/14
2243 views
0 replies

The impact of interruptions at work

Interruptions seem a central part of modern working life. Whether it’s open plan offices or the influx of digital tools into the workplace, a distraction never seems far away

Rob J Hyndman07/24/14
1693 views
0 replies

Plotting the characteristic roots for ARIMA models

When modelling data with ARIMA models, it is sometimes useful to plot the inverse characteristic roots. The following functions will compute and plot the inverse roots for any fitted ARIMA model (including seasonal models).

Mike Bushong07/24/14
2597 views
0 replies

Scaling Big Data fabrics

Certainly, Big Data applications are distributed largely because the size of the data on which computations are executed warrants more than a typical application can handle. But scaling the network that provides connectivity between Big Data nodes is not just about creating massive interconnects.

Steve Hanov07/24/14
1279 views
0 replies

You can cheat so your web site seems faster than it is

Previously, I was precalculating the completion which maximized the probability of the word, using some basterdized half-remembered version of bayes law. But I think there is a better approach, by running simulations on existing data.

Alec Noller07/23/14
5832 views
0 replies

Dev of the Week: Pierre-Hugues Charbonneau

Every week here and in our newsletter, we feature a new developer/blogger from the DZone community. This week we're talking to Pierre-Hugues Charbonneau, Senior IT Consultant and System Architect at CGI Inc., and author of DZone's 200th Refcard: Java Performance Optimization.

//[C# Code Sample]

Dictionary<string, Symbology> collection = new Dictionary<string, Symbology>();
collection.Add("ONE123", Symbology.Code39Standard);
collection.Add("Process Collection", Symbology.DataMatrix);
collection.Add("Dictionary Collection", Symbology.QR);
collection.Add("X06712AT", Symbology.Code128);
collection.Add("979026000043", Symbology.EAN13);
collection.Add("Aztec BarCode", Symbology.Aztec);

List<Bitmap> images = new List<Bitmap>();

foreach (KeyValuePair<string, Symbology> pair in collection)
using (BarCodeBuilder builder = new BarCodeBuilder())
{
    builder.CodeText = pair.Key;
    builder.SymbologyType = pair.Value;
    images.Add(builder.GenerateBarCodeImage());
}

int maxWidth = int.MinValue;
int sumHeight = 0;
foreach (Bitmap bmp in images)
{
    sumHeight += bmp.Height;
    if (maxWidth < bmp.Width)
        maxWidth = bmp.Width;
}

const int offset = 10;
Bitmap resultBitmap = new Bitmap(maxWidth + offset * 2, sumHeight + offset * images.Count);
using (Graphics g = Graphics.FromImage(resultBitmap))
{
    g.Clear(Color.White);

    int yPosition = offset;
    for (int i = 0; i < images.Count; ++i)
    {
        Bitmap currentBitmap = images[i];
        g.DrawImage(currentBitmap, offset, yPosition);
        yPosition += currentBitmap.Height + offset;
    }
}

resultBitmap.Save("barcode.png", ImageFormat.Png);

//[VB.NET Code Sample]

Dim collection As New Dictionary(Of String, Symbology)()
collection.Add("ONE123", Symbology.Code39Standard)
collection.Add("Process Collection", Symbology.DataMatrix)
collection.Add("Dictionary Collection", Symbology.QR)
collection.Add("X06712AT", Symbology.Code128)
collection.Add("979026000043", Symbology.EAN13)
collection.Add("Aztec BarCode", Symbology.Aztec)

Dim images As New List(Of Bitmap)()

For Each pair As KeyValuePair(Of String, Symbology) In collection
    Using builder As New BarCodeBuilder()
	builder.CodeText = pair.Key
	builder.SymbologyType = pair.Value
	images.Add(builder.GenerateBarCodeImage())
    End Using
Next

Dim maxWidth As Integer = Integer.MinValue
Dim sumHeight As Integer = 0
For Each bmp As Bitmap In images
    sumHeight += bmp.Height
    If maxWidth < bmp.Width Then
	maxWidth = bmp.Width
    End If
Next

Const  offset As Integer = 10
Dim resultBitmap As New Bitmap(maxWidth + offset * 2, sumHeight + offset * images.Count)
Using g As Graphics = Graphics.FromImage(resultBitmap)
    g.Clear(Color.White)

    Dim yPosition As Integer = offset
    For i As Integer = 0 To images.Count - 1
  	Dim currentBitmap As Bitmap = images(i)
	g.DrawImage(currentBitmap, offset, yPosition)
	yPosition += currentBitmap.Height + offset
    Next
End Using

resultBitmap.Save("barcode.png", ImageFormat.Png)

Borislav Iordanov07/23/14
5460 views
0 replies

Why is the Fundamental Theorem of Software Engineering Fundamental?

So you can see where I'm heading with the question posed at the title of this post. It is the reference resolution that is fundamental an indirection is simply what we do to (re)define what that resolution process ultimately looks like.

Hamid Shojaee07/23/14
2653 views
0 replies

Scrum and Quantum Physics

Since Scrum is an iterative process, you can have great success by focusing on things that you can say with a fair degree of confidence, while still allowing for some uncertainty in all planning and estimates.

Ayende Rahien07/23/14
3570 views
0 replies

Avoid where in a reduce clause

We got a customer question about a map/reduce index that produced the wrong results. The problem was a problem between the conceptual model and the actual model of how Map/Reduce actually works.

Mike Bushong07/23/14
1971 views
0 replies

Scenario planning for first-line managers

Almost every New Product Introduction process includes some placeholder slots to talk about risk. Everyone knows enough to put mitigation plans in these slots. But those mitigation plans are drafted and then ignored by the vast majority of managers.

Kin Lane07/23/14
1554 views
0 replies

GitHub Commit Storytelling: Now or Later

When you are making GitHub commits you have to provide a story that explains the changes you are committing to a repository. Many of us just post 'blah blah’, ‘what I said last time", or any other garbage that just gets us through the moment. You know you’ve all done it at some point.

-- Relative time with interval
DATE_SUB(NOW(), INTERVAL 25 HOUR)
 
-- Select all users that were updated in the last 24 hours.
SELECT * FROM users
WHERE users.updated > DATE_SUB(NOW(), INTERVAL 24 HOUR);
 
-- Select all users that were updated in the last 7 days.
SELECT * FROM users
WHERE users.updated > DATE_SUB(NOW(), INTERVAL 7 DAY);
Rob J Hyndman07/22/14
2816 views
0 replies

I am not an econometrician

Econo­met­rics is often “the­ory dri­ven” while sta­tis­tics tends to be “data dri­ven”. I dis­cov­ered this in the inter­view for my cur­rent job when some­one crit­i­cized my research for being “data dri­ven” and asked me to respond.

Mike Bushong07/22/14
2602 views
0 replies

Network abstractions need equivalent of packet walkthrough

Whenever a new networking platform is evaluated, one of the early sales calls includes a packet walkthrough. But why?