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  • Core Animation performance on iphone

    - by nico
    I'm trying to do some animations using Core Animation on the iphone. I'm using CABasicAnimation on CALayer. It's a straight forward animation from a random place at the top of the screen to the bottom of the screen at random speed, I have 30 elements that doing the same animation continuously until another action happens. But the performance on the iPhone 3G is very sluggish when the animations start. The image is only 8k. Is this the right approach? How should I change so it performs better. // image cached somewhere else. CGImageRef imageRef = [[UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:name ofType:@"png"]] CGImage]; - (void)animate:(NSTimer *)timer { int startX = round(radom() % 320); float speed = 1 / round(random() % 100 + 2); CALayer *layer = [CALayer layer]; layer.name = @"layer"; layer.contents = imageRef; // cached image layer.frame = CGRectMake(0, 0, CGImageGetWidth(imageRef), CGImageGetHeight(imageRef)); int width = layer.frame.size.width; int height = layer.frame.size.height; layer.frame = CGRectMake(startX, self.view.frame.origin.y, width, height); [effectLayer addSublayer:layer]; CGPoint start = CGPointMake(startX, 0); CGPoint end = CGPointMake(startX, self.view.frame.size.height); float repeatCount = 1e100; CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"position"]; animation.delegate = self; animation.fromValue = [NSValue valueWithCGPoint:start]; animation.toValue = [NSValue valueWithCGPoint:end]; animation.duration = speed; animation.repeatCount = repeatCount; animation.autoreverses = NO; animation.removedOnCompletion = YES; animation.fillMode = kCAFillModeForwards; [layer addAnimation:animation forKey:@"position"]; } The animations are fired off using a NSTimer. animationTimer = [NSTimer timerWithTimeInterval:0.2 target:self selector:@selector(animate:) userInfo:nil repeats:YES]; [[NSRunLoop currentRunLoop] addTimer:animationTimer forMode:NSDefaultRunLoopMode];

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  • Working with Multiple Layers - KineticJS

    - by Bruno Sampaio
    I'm using KineticJS 4.0.5 and I'm currently trying to draw the contents of several layers but only the last one added to stage is drawn... If I understood the documentation correctly this should be possible, otherwise why would we need a layer? I have three different layers: a background layer with just a Kinectic.Rect object; a elements layer with several types of shapes; and a top layer with elements I want to be always on top of everything. I populate those layers inside a draw function I have inside a object I created, this object also has a shape attribute which refers to the background and a contents attribute with the elements to add to the elements layer. My code for the draw function is the following: this.draw = function() { var stage = E.game.stage, layers = E.game.layers; stage.clear(); // Add Background this.shape.setSize(stage.getWidth(), stage.getHeight()); layers.background.add(this.shape); // Iterate over contents for(var i = 0; i < this.contents.length; i++) { layers.elements.add(this.contents[i].shape); } // Draw Everything stage.add(layers.background); stage.add(layers.elements); stage.add(layers.top); // This one is currently empty stage.draw(); } After running this function, only layers.top is drawn in the canvas, and if I comment the line where it is added only layers.elements is drawn. However the stage has 3 childrens (I checked it with inspect element on chrome) and in the documentation it says the draw function draws all layers... Am I doing something wrong here? Or it isn't possible? And if it's not possible why would I need a layer and a stage? Wouldn't one be enough? Thank you in advance. Edit: I was able to solve the problem, I was applying a white background color with css to the canvas element and since each layer creates a new canvas element above the others I could only see the contents for the top most layer (in this case just white). However, I still have a problem related with multiple layers that I didn't have before with just one layer. When I use the clear function on the stage it should clear the layers right? But instead the layers remain exactly the same, even if I try to call clear on each individual layer they won't change... I'm also using the stage draw function after clearing them but still no changes at all... The only solution I found until now was by removing the layer from the stage and adding it again :s Is there a better way to reset the layers contents? Thank you again and sorry for the confusion with the first question.

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  • Unable to Align Layers in Photoshop Properly with CS2

    - by Jonathan Sampson
    Cannot Align Semi-Transparent Items? Windows Vista, Photoshop CS2. Steps to repeat: Create new document Fill a circle on a new layer Drop opacity of filled circle to 10% Create new empty layer below circle layer Merge empty layer with filled circle layer Select entire canvas Attempt to align layers to selectionlayer > align layers to selection > vertical centers I get the following error: Could not complete the Vertical Centers command because there are no layers to be moved. Clearly this is not true, as I'm selecting the layer with the semi-translucent ball on it. Now, if you had tried this same command prior to step 5 (when the layer was at 10% opacity) it would have worked. Is there some way around this problem? I need to move layers around that begin as transparent items, with a layer opacity at 100% where 100% of the layers opacity results in showing objects that are themselves not-very opaque. I've confirmed on another machine that this problem doesn't exist in CS3. I may exist in earlier copies of Photoshop, but I only have access to CS2 (has the problem) and CS3 (does not have the problem).

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  • [CA_COLOR_OPAQUE] things that make a layer non-opaque. scaled CAGradientLayer?

    - by mahal tertin
    i spent some time with the environment variable CA_COLOR_OPAQUE = 1 and have my findings to share. things that make a CALayer non-opaque (slow, more memory, ...): * contents with alpha (like an NSImage with an icon) * NSImage/CGImage from a pdf as contents (even when the pdf does not contain any alpha and opaque=YES) * backgroundColor = nil * CATextLayer with text in a (because it is contents with alpha) * rounded corners? maybe/sometimes * masksToBounds? not necessarily as we scale most of tree with CATransform3DScale on sublayerTransform i found also these rather irritating non-opaque: * CAGradientLayer that is somewhere down in this scaled tree (even when set all the gradient colors without alpha) * edgeAntialiasingMask != 0 of a layer that is somewhere down in this scaled tree the last two do not make sense to me. why should it be non opaque? what do i see? if anyone has any thoughts on these findings, i'm happy to learn as i couldn't find such a list yet.

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  • Do, custom fonts work in UITextView that was loaded in cocos2d layer ?

    - by srikanth rongali
    Do, custom fonts work in UITextView ? I loaded UITextView *textView in cocos2d layer. And I trying to set the font of the text as Copperplate Gothic Bold. I downloaded the font file Coprgtb.TTF. But, the text is not adjusting to this font. The system fonts are working, but the custom fonts are not working ? I added the font file in resources folder. what can I do to make them work ? Thank You.

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  • Is it safe to use Email service that provided from webhosting for business use?

    - by Kronass
    I work in a company who uses their web-hosting as their email provider, they use it for normal send, receive and basic contacts management, they use it in customers support, sales and marketing, I would prefer to use a dedicated or professional email hosting instead for this type of work. So for business use is it safe to use the email hosting that is included with hosting package or go with a professional email provider?

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  • How to provide wireless internet in a small business?

    - by ColinYounger
    My wife has a small business that she wants to offer a free WiFi hotspot in. She suggested opening up our private 'net connection to the customers - T&Cs of our internet provider and thoughts of random people viewing kiddy porn floated through my mind. So, first action will be to get a separate internet connection. But I have no experience of setting up a public WiFi connection. What considerations should I make with regards to: WAP Security Access logging?

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  • How to provide wireless internet in a small business?

    - by ColinYounger
    My wife has a small business that she wants to offer a free WiFi hotspot in. She suggested opening up our private 'net connection to the customers - T&Cs of our internet provider and thoughts of random people viewing kiddy porn floated through my mind. So, first action will be to get a separate internet connection. But I have no experience of setting up a public WiFi connection. What considerations should I make with regards to: WAP Security Access logging?

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  • What's the best way to block IP spoofing on a layer 3 switch?

    - by toupeira
    We're hosting Dedicated Servers and are currently using old 3com switches with IP-based ACLs. So each port has an ACL that allows all IP addresses assigned to this customer, and blocks everything else. But now 3com was bought by HP, and the follow-up model only supports basic ACL that aren't flexible enough to both allow certain IPs while blocking others. Looking at other switches in a similar price-range, we've found that most of them have similar problems or don't offer any ACL features at all. I assume this could also somehow be done with VLANs, but if I understand this correctly we'd still need some kind of ACL to actually specify the valid IP addresses for each port. What do you use to make sure your customers don't use unassigned IP addresses? Or what switches can you recommend that have flexible ACL functionality?

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  • Relative path incorrect in the view layer when hosting a rails3 app in a subdirectory using passenger and apache

    - by Saifis
    I want to host multiple Rails apps on a multiple server using sub-directories. And have encountered some relative path problems. I have made a symbolic link to the app's public directory and placed it in the /var/www/html directory, var/www/html/ /test_app (symbolic link to the public folder of test_app) and set apache as so LoadModule passenger_module /usr/local/lib/ruby/gems/1.9.1/gems/passenger-3.0.12/ext/apache2/mod_passenger.so PassengerRoot /usr/local/lib/ruby/gems/1.9.1/gems/passenger-3.0.12 PassengerRuby /usr/local/bin/ruby <VirtualHost *:80> ServerName test.com DocumentRoot /var/www/html Options Indexes FollowSymLinks -MultiViews RailsBaseURI /test_app </Location> </VirtualHost> The links in the app itself works just fine, all the links acknowledge the test_app/ directory and work, however, when it comes to showing images in the public directory in the view, the relative path goes wrong. Say I have /system/files/1/aaa.png it goes looking for it in /var/www/html/system/files/1/aaa.png rather than /var/www/html/test_app/system/files/1/aaa.png As far as I understand this is an Apache setting problem than something to be done in Rails, if its possible I would prefer to have it contained in the conf file of apache rather than having to alter the code.

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  • CALayer won't display

    - by Paul from Boston
    I'm trying to learn how to use CALayers for a project and am having trouble getting sublayers to display. I created a vanilla View-based iPhone app in XCode for these tests. The only real code is in the ViewController which sets up the layers and their delegates. There is a delegate, DelegateMainView, for the viewController's view layer and a second different one, DelegateStripeLayer, for an additional layer. The ViewController code is all in awakeFromNib, - (void)awakeFromNib { DelegateMainView *oknDelegate = [[DelegateMainView alloc] init]; self.view.layer.delegate = oknDelegate; CALayer *newLayer = [CALayer layer]; DelegateStripeLayer *sldDelegate = [[DelegateStripeLayer alloc] init]; newLayer.delegate = sldDelegate; [self.view.layer addSublayer:newLayer]; [newLayer setNeedsDisplay]; [self.view.layer setNeedsDisplay]; } The two different delegates are simply wrappers for the CALayer delegate method, drawLayer:inContext:, i.e., - (void)drawLayer:(CALayer *)layer inContext:(CGContextRef)context { CGRect bounds = CGContextGetClipBoundingBox(context); ... do some stuff here ... CGContextStrokePath(context); } each a bit different. The layer, view.layer, is drawn properly but newLayer is never drawn. If I put breakpoints in the two delegates, the program stops in DelegateMainView but never reaches DelegateStripeLayer. What am I missing here? Thanks.

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  • N-Tier Architecture - Structure with multiple projects in VB.NET

    - by focus.nz
    I would like some advice on the best approach to use in the following situation... I will have a Windows Application and a Web Application (presentation layers), these will both access a common business layer. The business layer will look at a configuration file to find the name of the dll (data layer) which it will create a reference to at runtime (is this the best approach?). The reason for creating the reference at runtime to the data access layer is because the application will interface with a different 3rd party accounting system depending on what the client is using. So I would have a separate data access layer to support each accounting system. These could be separate setup projects, each client would use one or the other, they wouldn't need to switch between the two. Projects: MyCompany.Common.dll - Contains interfaces, all other projects have a reference to this one. MyCompany.Windows.dll - Windows Forms Project, references MyCompany.Business.dll MyCompany.Web.dll - Website project, references MyCompany.Business.dll MyCompany.Busniess.dll - Business Layer, references MyCompany.Data.* (at runtime) MyCompany.Data.AccountingSys1.dll - Data layer for accounting system 1 MyCompany.Data.AccountingSys2.dll - Data layer for accounting system 2 The project MyCompany.Common.dll would contain all the interfaces, each other project would have a reference to this one. Public Interface ICompany ReadOnly Property Id() as Integer Property Name() as String Sub Save() End Interface Public Interface ICompanyFactory Function CreateCompany() as ICompany End Interface The project MyCompany.Data.AccountingSys1.dll and MyCompany.Data.AccountingSys2.dll would contain the classes like the following: Public Class Company Implements ICompany Protected _id As Integer Protected _name As String Public ReadOnly Property Id As Integer Implements MyCompany.Common.ICompany.Id Get Return _id End Get End Property Public Property Name As String Implements MyCompany.Common.ICompany.Name Get Return _name End Get Set(ByVal value as String) _name = value End Set End Property Public Sub Save() Implements MyCompany.Common.ICompany.Save Throw New NotImplementedException() End Sub End Class Public Class CompanyFactory Implements ICompanyFactory Public Function CreateCompany() As ICompany Implements MyCompany.Common.ICompanyFactory.CreateCompany Return New Company() End Function End Class The project MyCompany.Business.dll would provide the business rules and retrieve data form the data layer: Public Class Companies Public Shared Function CreateCompany() As ICompany Dim factory as New MyCompany.Data.CompanyFactory Return factory.CreateCompany() End Function End Class Any opinions/suggestions would be greatly appreciated.

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  • Dependency Injection and decoupling of software layers

    - by cs31415
    I am trying to implement Dependency Injection to make my app tester friendly. I have a rather basic doubt. Data layer uses SqlConnection object to connect to a SQL server database. SqlConnection object is a dependency for data access layer. In accordance with the laws of dependency injection, we must not new() dependent objects, but rather accept them through constructor arguments. Not wanting to upset the DI gods, I dutifully create a constructor in my DAL that takes in SqlConnection. Business layer calls DAL. Business layer must therefore, pass in SqlConnection. Presentation layer calls Business layer. Hence it too, must pass in SqlConnection to business layer. This is great for class isolation and testability. But didn't we just couple the UI and Business layers to a specific implementation of the data layer which happens to use a relational database? Why do the Presentation and Business layers need to know that the underlying data store is SQL? What if the app needs to support multiple data sources other than SQL server (such as XML files, Comma delimited files etc.) Furthermore, what if I add another object upon which my data layer is dependent on (say, a second database). Now, I have to modify the upper layers to pass in this new object. How can I avoid this merry-go-round and reap all the benefits of DI without the pain?

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  • Bluetooth not detected on Asus X401A / Ubuntu 12.10

    - by Majster-pl
    I have Asus X401A ( according to specs bluetooth is build-in to this laptop, http://www.asus.com/Notebooks/Versatile_Performance/X401A/#specifications ) Bluetooth in global settings is gray ( unable to turn it on ) rfkill list output: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no 1: asus-wlan: Wireless LAN Soft blocked: no Hard blocked: no cat /var/log/dmesg | grep Blue* [ 5.895791] Bluetooth: Core ver 2.16 [ 5.895807] Bluetooth: HCI device and connection manager initialized [ 5.895809] Bluetooth: HCI socket layer initialized [ 5.895810] Bluetooth: L2CAP socket layer initialized [ 5.895814] Bluetooth: SCO socket layer initialized [ 5.909618] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [ 5.909621] Bluetooth: BNEP filters: protocol multicast [ 5.910020] Bluetooth: RFCOMM TTY layer initialized [ 5.910024] Bluetooth: RFCOMM socket layer initialized [ 5.910025] Bluetooth: RFCOMM ver 1.11 hcitool dev Devices: (empty) My wifes laptop Asus K53 have the same problem Ubuntu 12.04 LTS Any help please ?

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  • How to structure an enterprise MVC app, and where does Business Logic go?

    - by James
    I am an MVC newbie. As far as I can tell: Controller: deals with routing requests View: deals with presentation of data Model: looks a whole lot like a Data Access layer Where does the Business Logic go? Take a large enterprise application with: Several different sources of data (WCF, WebServices and ADO) tied together in a data access layer (useing multiple different DTOs). A lot business logic segmented over several dlls. What is an appropriate way for an MVC web application to sit on top of this (in terms of code and project structure)? The example I have seen where everything just goes in the Model folder don't seem like they are appropriate for very large applications. Thanks for any advice!

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  • If you are forced to use an Anemic domain model, where do you put your business logic and calculated

    - by Jess
    Our current O/RM tool does not really allow for rich domain models, so we are forced to utilize anemic (DTO) entities everywhere. This has worked fine, but I continue to struggle with where to put basic object-based business logic and calculated fields. Current layers: Presentation Service Repository Data/Entity Our repository layer has most of the basic fetch/validate/save logic, although the service layer does a lot of the more complex validation & saving (since save operations also do logging, checking of permissions, etc). The problem is where to put code like this: Decimal CalculateTotal(LineItemEntity li) { return li.Quantity * li.Price; } or Decimal CalculateOrderTotal(OrderEntity order) { Decimal orderTotal = 0; foreach (LineItemEntity li in order.LineItems) { orderTotal += CalculateTotal(li); } return orderTotal; } Any thoughts?

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  • At which architecture level are you running BDD tests (e.g. Cucumber)

    - by Pete
    I have in the last year gotten quite fond of using SpecFlow (which is a .NET port of Cucumber) I have used it both to test a ASP.NET MVC application at the web layer, i.e. using browser automation, but also at the controller layer. The first gives me a higher confidence in the correctness of the application, because JavaScript is tested, and improper controller configuration is also caught. But those tests are slower to execute, and more complex to implement, than those just testing on the controller layer. My tests are full functional tests, i.e. they exercise all layers of the application, all the way down to the database. So the first thing before any scenario is that the database is cleared of data, allowing the test to assume that only data specified in the "Given" block exists. Then I see example on how to use it, where they test just exercise the model layer. So what are your experiences with these tools? Which layer of the application do you test?

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  • Passing data between engine layers

    - by spaceOwl
    I am building a software system (game engine with networking support ) that is made up of (roughly) these layers: Game Layer Messaging Layer Networking Layer Game related data is passed to the messaging layer (this could be anything that is game specific), where they are to be converted to network specific messages (which are then serialized to byte arrays). I'm looking for a way to be able to convert "game" data into "network" data, such that no strong coupling between these layers will exist. As it looks now, the Messaging layer sits between both layers (game and network) and "knows" both of them (it contains Converter objects that know how to translate between data objects of both layers back and forth). I am not sure this is the best solution. Is there a good design for passing objects between layers? I'd like to learn more about the different options.

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  • How to convert Vector Layer coordinates into Map Latitude and Longitude in Openlayers.

    - by Jenny
    I'm pretty confused. I have a point: x= -12669114.702301 y= 5561132.6760608 That I got from drawing a square on a vector layer with the DrawFeature controller. The numbers seem...erm...awfull large, but they seem to work, because if I later draw a square with all the same points, it's in the same position, so I figure they have to be right. The problem is when I try to convert this point to latitude and longitude. I'm using: map.getLonLatFromPixel(pointToPixel(points[0])); Where points[0] is a geometry Point, and the pointToPixel function takes any point and turns it into a pixel (since the getLonLatFromPixel needs a pixel). It does this by simply taking the point's x, and making it the pixels x, and so on. The latitude and longitude I get is on the order of: lat: -54402718463.864 lng: -18771380.353223 This is very clearly wrong. I'm left really confused. I try projecting this object, using: .transform(new OpenLayers.Projection("EPSG:4326"), map.getProjectionObject()); But I don't really get it and am pretty sure I did it incorrectly, anyways. My code is here: http://pastie.org/909644 I'm sort of at a loss. The coordinates seem consistent, because I can reuse them to get the same result...but they seem way larger than any of the examples I'm seeing on the openLayers website...

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  • Rapid Evolution of Society & Technology

    - by Michael Snow
    We caught up with Brian Solis on the phone the other day and Christie Flanagan had a chance to chat with him and learn a bit more about him and some of the concepts he'll be addressing in our Social Business Thought Leaders Webcast on Thursday 12/13/12. «--- Interview with Brian Solis  Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-family:"Calibri","sans-serif"; mso-ascii- mso-ascii-theme-font:minor-latin; mso-fareast- mso-fareast-theme-font:minor-latin; mso-hansi- mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} Be sure and register for this week's webcast ---» ------------------- Guest post by Brian Solis. Reposted (Borrowed) from his posting of May 24, 2012 Dear [insert business name], what’s your promise? - Brian Solis You say you want to get closer to customers, but your actions are different than your words. You say you want to “surprise and delight” customers, but your product development teams are too busy building against a roadmap without consideration of the 5th P of marketing…people. Your employees are your number one asset, however the infrastructure of the organization has turned once optimistic and ambitious intrapreneurs into complacent cogs or worse, your greatest detractors. You question the adoption of disruptive technology by your internal champions yet you’ve not tried to find the value for yourself. You’re a change agent and you truly wish to bring about change, but you’ve not invested time or resources to answer “why” in your endeavors to become a connected or social business. If we are to truly change, we must find purpose. We must uncover the essence of our business and the value it delivers to traditional and connected consumers. We must rethink the spirit of today’s embrace and clearly articulate how transformation is going to improve customer and employee experiences and relationships now and over time. Without doing so, any attempts at evolution will be thwarted by reality. In an era of Digital Darwinism, no business is too big to fail or too small to succeed. These are undisciplined times which require alternative approaches to recognize and pursue new opportunities. But everything begins with acknowledging the 360 view of the world that you see today is actually a filtered view of managed and efficient convenience. Today, many organizations that were once inspired by innovation and engagement have fallen into a process of marketing, operationalizing, managing, and optimizing. That might have worked for the better part of the last century, but for the next 10 years and beyond, new vision, leadership and supporting business models will be written to move businesses from rigid frameworks to adaptive and agile entities. I believe that today’s executives will undergo a great test; a test of character, vision, intention, and universal leadership. It starts with a simple, but essential question…what is your promise? Notice, I didn’t ask about your brand promise. Nor did I ask for you to cite your mission and vision statements. This is much more than value propositions or manufactured marketing language designed to hook audiences and stakeholders. I asked for your promise to me as your consumer, stakeholder, and partner. This isn’t about B2B or B2C, but instead, people to people, person to person. It is this promise that will breathe new life into an organization that on the outside, could be misdiagnosed as catatonic by those who are disrupting your markets. A promise, for example, is meant to inspire. It creates alignment. It serves as the foundation for your vision, mission, and all business strategies and it must come from the top to mean anything. For without it, we cannot genuinely voice what it is we stand for or stand behind. Think for a moment about the definition of community. It’s easy to confuse a workplace or a market where everyone simply shares common characteristics. However, a community in this day and age is much more than belonging to something, it’s about doing something together that makes belonging matter The next few years will force a divide where companies are separated by intention as measured by actions and words. But, becoming a social business is not enough. Becoming more authentic and transparent doesn’t serve as a mantra for a renaissance. A promise is the ink that inscribes the spirit of the relationship between you and me. A promise serves as the words that influence change from within and change beyond the halls of our business. It is the foundation for a renewed embrace, one that must then find its way to every aspect of the organization. It’s the difference between a social business and an adaptive business. While an adaptive business can also be social, it is the culture of the organization that strives to not just use technology to extend current philosophies or processes into new domains, but instead give rise to a new culture where striving for relevance is among its goals. The tools and networks simply become enablers of a greater mission You are reading this because you believe in something more than what you’re doing today. While you fight for change within your organization, remember to aim for a higher purpose. Organizations that strive for innovation, imagination, and relevance will outperform those that do not. Part of your job is to lead a missionary push that unites the groundswell with a top down cascade. Change will only happen because you and other internal champions see what others can’t and will do what other won’t. It takes resolve. It takes the ability to translate new opportunities into business value. And, it takes courage. “This is a very noisy world, so we have to be very clear what we want them to know about us”-Steve Jobs ----------------------------------------------------------------- So -- where do you begin to evaluate the kind of experience you are delivering for your customers, partners, and employees?  Take a look at this White Paper: Creating a Successful and Meaningful Customer Experience on the Web and then have a cup of coffee while you listen to the sage advice of Guy Kawasaki in a short video below.   An interview with Guy Kawasaki on Maximizing Social Media Channels 

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  • addSublayer vs addSubView which is more efficient?

    - by soonio
    I have 5 UIImageViews for displaying 5 images. For my app, I need swap the order of them depending on some events. I achieve this by calling: [anImageView1 removeFromSuperview]; [self.view insertSubview:anImageView1 aboveSubview:anImageView2]; Recently, I've come across a different method for doing this using 1 UIView and 5 UIImageViews. Each layer of UIImageViews are added to this UIView by calling [aView.layer addSublayer:anImageView1.layer]; [aView.layer addSublayer:anImageView2.layer]; etc. and then in order to swap the order of things by calling [anImageView1.layer removeFromSuperLayer]; [aView.layer insertSublayer:anImageView1 above: anImageView2] Both methods work fine, but can someone please point out which method is better and why? I really can't seem to be able to find much on CALayer... Please help! Thank you so much!

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  • DDD and IOC Containers

    - by MegaByte
    Hi Im fairly new with DDD and Im trying to use IOC in order to loosen up my tightly coupled layers :) My C# web application consists of a UI, domain and persistence layer. My persistence layer references my domain layer and contains my concrete repository implementations and nhibernate mappings. Currently my UI references my domain layer. My question : How do I use an IOC container to inject my concrete classes, in my persistence layer, into my domain layer? Does this meen that my UI should also reference my persistence layer?

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