Author: Titus Winters
Publisher: O'Reilly Media
ISBN: 1492082767
Category : Computers
Languages : en
Pages : 602
Book Description
Today, software engineers need to know not only how to program effectively but also how to develop proper engineering practices to make their codebase sustainable and healthy. This book emphasizes this difference between programming and software engineering. How can software engineers manage a living codebase that evolves and responds to changing requirements and demands over the length of its life? Based on their experience at Google, software engineers Titus Winters and Hyrum Wright, along with technical writer Tom Manshreck, present a candid and insightful look at how some of the world’s leading practitioners construct and maintain software. This book covers Google’s unique engineering culture, processes, and tools and how these aspects contribute to the effectiveness of an engineering organization. You’ll explore three fundamental principles that software organizations should keep in mind when designing, architecting, writing, and maintaining code: How time affects the sustainability of software and how to make your code resilient over time How scale affects the viability of software practices within an engineering organization What trade-offs a typical engineer needs to make when evaluating design and development decisions
Software Engineering at Google
Author: Titus Winters
Publisher: O'Reilly Media
ISBN: 1492082767
Category : Computers
Languages : en
Pages : 602
Book Description
Today, software engineers need to know not only how to program effectively but also how to develop proper engineering practices to make their codebase sustainable and healthy. This book emphasizes this difference between programming and software engineering. How can software engineers manage a living codebase that evolves and responds to changing requirements and demands over the length of its life? Based on their experience at Google, software engineers Titus Winters and Hyrum Wright, along with technical writer Tom Manshreck, present a candid and insightful look at how some of the world’s leading practitioners construct and maintain software. This book covers Google’s unique engineering culture, processes, and tools and how these aspects contribute to the effectiveness of an engineering organization. You’ll explore three fundamental principles that software organizations should keep in mind when designing, architecting, writing, and maintaining code: How time affects the sustainability of software and how to make your code resilient over time How scale affects the viability of software practices within an engineering organization What trade-offs a typical engineer needs to make when evaluating design and development decisions
Publisher: O'Reilly Media
ISBN: 1492082767
Category : Computers
Languages : en
Pages : 602
Book Description
Today, software engineers need to know not only how to program effectively but also how to develop proper engineering practices to make their codebase sustainable and healthy. This book emphasizes this difference between programming and software engineering. How can software engineers manage a living codebase that evolves and responds to changing requirements and demands over the length of its life? Based on their experience at Google, software engineers Titus Winters and Hyrum Wright, along with technical writer Tom Manshreck, present a candid and insightful look at how some of the world’s leading practitioners construct and maintain software. This book covers Google’s unique engineering culture, processes, and tools and how these aspects contribute to the effectiveness of an engineering organization. You’ll explore three fundamental principles that software organizations should keep in mind when designing, architecting, writing, and maintaining code: How time affects the sustainability of software and how to make your code resilient over time How scale affects the viability of software practices within an engineering organization What trade-offs a typical engineer needs to make when evaluating design and development decisions
Facts and Fallacies of Software Engineering
Author: Robert L. Glass
Publisher: Addison-Wesley Professional
ISBN: 9780321117427
Category : Computers
Languages : en
Pages : 218
Book Description
Regarding the controversial and thought-provoking assessments in this handbook, many software professionals might disagree with the authors, but all will embrace the debate. Glass identifies many of the key problems hampering success in this field. Each fact is supported by insightful discussion and detailed references.
Publisher: Addison-Wesley Professional
ISBN: 9780321117427
Category : Computers
Languages : en
Pages : 218
Book Description
Regarding the controversial and thought-provoking assessments in this handbook, many software professionals might disagree with the authors, but all will embrace the debate. Glass identifies many of the key problems hampering success in this field. Each fact is supported by insightful discussion and detailed references.
A Philosophy of Software Design
Author: John K. Ousterhout
Publisher:
ISBN: 9781732102217
Category : Computer programs
Languages : en
Pages : 0
Book Description
"This book addresses the topic of software design: how to decompose complex software systems into modules (such as classes and methods) that can be implemented relatively independently. The book first introduces the fundamental problem in software design, which is managing complexity. It then discusses philosophical issues about how to approach the software design process and it presents a collection of design principles to apply during software design. The book also introduces a set of red flags that identify design problems. You can apply the ideas in this book to minimize the complexity of large software systems, so that you can write software more quickly and cheaply."--Amazon.
Publisher:
ISBN: 9781732102217
Category : Computer programs
Languages : en
Pages : 0
Book Description
"This book addresses the topic of software design: how to decompose complex software systems into modules (such as classes and methods) that can be implemented relatively independently. The book first introduces the fundamental problem in software design, which is managing complexity. It then discusses philosophical issues about how to approach the software design process and it presents a collection of design principles to apply during software design. The book also introduces a set of red flags that identify design problems. You can apply the ideas in this book to minimize the complexity of large software systems, so that you can write software more quickly and cheaply."--Amazon.
Modern Software Engineering
Author: David Farley
Publisher: Addison-Wesley Professional
ISBN: 0137314868
Category : Computers
Languages : en
Pages : 479
Book Description
Improve Your Creativity, Effectiveness, and Ultimately, Your Code In Modern Software Engineering, continuous delivery pioneer David Farley helps software professionals think about their work more effectively, manage it more successfully, and genuinely improve the quality of their applications, their lives, and the lives of their colleagues. Writing for programmers, managers, and technical leads at all levels of experience, Farley illuminates durable principles at the heart of effective software development. He distills the discipline into two core exercises: learning and exploration and managing complexity. For each, he defines principles that can help you improve everything from your mindset to the quality of your code, and describes approaches proven to promote success. Farley's ideas and techniques cohere into a unified, scientific, and foundational approach to solving practical software development problems within realistic economic constraints. This general, durable, and pervasive approach to software engineering can help you solve problems you haven't encountered yet, using today's technologies and tomorrow's. It offers you deeper insight into what you do every day, helping you create better software, faster, with more pleasure and personal fulfillment. Clarify what you're trying to accomplish Choose your tools based on sensible criteria Organize work and systems to facilitate continuing incremental progress Evaluate your progress toward thriving systems, not just more "legacy code" Gain more value from experimentation and empiricism Stay in control as systems grow more complex Achieve rigor without too much rigidity Learn from history and experience Distinguish "good" new software development ideas from "bad" ones Register your book for convenient access to downloads, updates, and/or corrections as they become available. See inside book for details.
Publisher: Addison-Wesley Professional
ISBN: 0137314868
Category : Computers
Languages : en
Pages : 479
Book Description
Improve Your Creativity, Effectiveness, and Ultimately, Your Code In Modern Software Engineering, continuous delivery pioneer David Farley helps software professionals think about their work more effectively, manage it more successfully, and genuinely improve the quality of their applications, their lives, and the lives of their colleagues. Writing for programmers, managers, and technical leads at all levels of experience, Farley illuminates durable principles at the heart of effective software development. He distills the discipline into two core exercises: learning and exploration and managing complexity. For each, he defines principles that can help you improve everything from your mindset to the quality of your code, and describes approaches proven to promote success. Farley's ideas and techniques cohere into a unified, scientific, and foundational approach to solving practical software development problems within realistic economic constraints. This general, durable, and pervasive approach to software engineering can help you solve problems you haven't encountered yet, using today's technologies and tomorrow's. It offers you deeper insight into what you do every day, helping you create better software, faster, with more pleasure and personal fulfillment. Clarify what you're trying to accomplish Choose your tools based on sensible criteria Organize work and systems to facilitate continuing incremental progress Evaluate your progress toward thriving systems, not just more "legacy code" Gain more value from experimentation and empiricism Stay in control as systems grow more complex Achieve rigor without too much rigidity Learn from history and experience Distinguish "good" new software development ideas from "bad" ones Register your book for convenient access to downloads, updates, and/or corrections as they become available. See inside book for details.
Developer Hegemony
Author: Erik Dietrich
Publisher: BlogIntoBook.com
ISBN:
Category : Business & Economics
Languages : en
Pages : 430
Book Description
It’s been said that software is eating the planet. The modern economy—the world itself—relies on technology. Demand for the people who can produce it far outweighs the supply. So why do developers occupy largely subordinate roles in the corporate structure? Developer Hegemony explores the past, present, and future of the corporation and what it means for developers. While it outlines problems with the modern corporate structure, it’s ultimately a play-by-play of how to leave the corporate carnival and control your own destiny. And it’s an emboldening, specific vision of what software development looks like in the world of developer hegemony—one where developers band together into partner firms of “efficiencers,” finally able to command the pay, respect, and freedom that’s earned by solving problems no one else can. Developers, if you grow tired of being treated like geeks who can only be trusted to take orders and churn out code, consider this your call to arms. Bring about the autonomous future that’s rightfully yours. It’s time for developer hegemony.
Publisher: BlogIntoBook.com
ISBN:
Category : Business & Economics
Languages : en
Pages : 430
Book Description
It’s been said that software is eating the planet. The modern economy—the world itself—relies on technology. Demand for the people who can produce it far outweighs the supply. So why do developers occupy largely subordinate roles in the corporate structure? Developer Hegemony explores the past, present, and future of the corporation and what it means for developers. While it outlines problems with the modern corporate structure, it’s ultimately a play-by-play of how to leave the corporate carnival and control your own destiny. And it’s an emboldening, specific vision of what software development looks like in the world of developer hegemony—one where developers band together into partner firms of “efficiencers,” finally able to command the pay, respect, and freedom that’s earned by solving problems no one else can. Developers, if you grow tired of being treated like geeks who can only be trusted to take orders and churn out code, consider this your call to arms. Bring about the autonomous future that’s rightfully yours. It’s time for developer hegemony.
Professional Test Driven Development with C#
Author: James Bender
Publisher: John Wiley & Sons
ISBN: 111810210X
Category : Computers
Languages : en
Pages : 361
Book Description
Hands-on guidance to creating great test-driven development practice Test-driven development (TDD) practice helps developers recognize a well-designed application, and encourages writing a test before writing the functionality that needs to be implemented. This hands-on guide provides invaluable insight for creating successful test-driven development processes. With source code and examples featured in both C# and .NET, the book walks you through the TDD methodology and shows how it is applied to a real-world application. You’ll witness the application built from scratch and details each step that is involved in the development, as well as any problems that were encountered and the solutions that were applied. Clarifies the motivation behind test-driven development (TDD), what it is, and how it works Reviews the various steps involved in developing an application and the testing that is involved prior to implementing the functionality Discusses unit testing and refactoring Professional Test-Driven Development with C# shows you how to create great TDD processes right away.
Publisher: John Wiley & Sons
ISBN: 111810210X
Category : Computers
Languages : en
Pages : 361
Book Description
Hands-on guidance to creating great test-driven development practice Test-driven development (TDD) practice helps developers recognize a well-designed application, and encourages writing a test before writing the functionality that needs to be implemented. This hands-on guide provides invaluable insight for creating successful test-driven development processes. With source code and examples featured in both C# and .NET, the book walks you through the TDD methodology and shows how it is applied to a real-world application. You’ll witness the application built from scratch and details each step that is involved in the development, as well as any problems that were encountered and the solutions that were applied. Clarifies the motivation behind test-driven development (TDD), what it is, and how it works Reviews the various steps involved in developing an application and the testing that is involved prior to implementing the functionality Discusses unit testing and refactoring Professional Test-Driven Development with C# shows you how to create great TDD processes right away.
Stick it, reader, in your butt, it is where the freedom is
Author: Iryna Shevchenko
Publisher: Lulu.com
ISBN: 1300169729
Category : Biography & Autobiography
Languages : en
Pages : 76
Book Description
The Memoirs of lunatic or book of Love short stories included - the other name of book. The book is the not traditional romance; there is the few articles.
Publisher: Lulu.com
ISBN: 1300169729
Category : Biography & Autobiography
Languages : en
Pages : 76
Book Description
The Memoirs of lunatic or book of Love short stories included - the other name of book. The book is the not traditional romance; there is the few articles.
Bioinformatics Software Engineering
Author: Paul Weston
Publisher: John Wiley & Sons
ISBN: 0470858346
Category : Medical
Languages : en
Pages : 140
Book Description
Bioinformatics Software Engineering: Delivering Effective Applications will be useful to anyone who wants to understand how successful software can be developed in a rapidly changing environment. A handbook, not a textbook, it is not tied to any particular operating system, platform, language, or methodology. Instead it focuses on principles and practices that have been proven in the real world. It is pragmatic, emphasizing the importance of what the author calls Adaptive Programming - doing what works in your situation, and it is concise, covering the whole software development lifecycle in one slim volume. At each stage, it describes common pitfalls, explains how these can be avoided, and suggests simple techniques which make it easier to deliver better solutions. "Well thought-out ... addresses many of the key issues facing developers of bioinformatics software." (Simon Dear, Director, UK Technology and Development, Bioinformatics Engineering and Integration, Genetics Research, GlaxoSmithKline) Here are some examples from the book itself. On software development: “Writing software properly involves talking to people – often lots of people – and plenty of non-coding work on your part. It requires the ability to dream up new solutions to problems so complicated that they are hard to describe.” From description to specification: “Look for verbs – action words, such as ‘does’, ‘is’ and ‘views’. Identify nouns – naming words, like ‘user’, ‘home’ and ‘sequence’. List the adjectives – describing words, for example ‘quick’, ‘simple’ or ‘precise’. The verbs are the functions that must be provided by your application. The nouns define the parameters to those functions, and the adjectives specify the constraint conditions under which your program must operate.” On how to start writing software: “Handle errors. Take in data. Show output. Get going!” On testing: “It may not be physically possible to test every potential combination of situations that could occur as users interact with a program. But one thing that can be done is to test an application at the agreed extremes of its capability: the maximum number of simultaneous users it has to support, the minimum system configuration it must run on, the lowest communication speed it must cope with, and the most complex operations it must perform. If your program can cope with conditions at the edge of its performance envelope, it is less likely to encounter difficulties in dealing with less challenging situations.” On showing early versions of software to users: “It can be hard explaining the software development process to people who are unfamiliar with it. Code that to you is nearly finished is simply not working to them, and seeing their dream in bits on the workbench can be disappointing to customers, especially when they were expecting to be able to take it for a test drive.” On bugs: “If your users find a genuinely reproducible bug in production code, apologize, fix it fast, and then fix the system that allowed it through. And tell your customers what you are doing, and why, so they will be confident that it will not happen again. Everybody makes mistakes. Don’t make the same ones twice.” And one last thought on successful software development: "You have to be a detective, following up clues and examining evidence to discover what has gone wrong and why. And you have to be a politician, underst
Publisher: John Wiley & Sons
ISBN: 0470858346
Category : Medical
Languages : en
Pages : 140
Book Description
Bioinformatics Software Engineering: Delivering Effective Applications will be useful to anyone who wants to understand how successful software can be developed in a rapidly changing environment. A handbook, not a textbook, it is not tied to any particular operating system, platform, language, or methodology. Instead it focuses on principles and practices that have been proven in the real world. It is pragmatic, emphasizing the importance of what the author calls Adaptive Programming - doing what works in your situation, and it is concise, covering the whole software development lifecycle in one slim volume. At each stage, it describes common pitfalls, explains how these can be avoided, and suggests simple techniques which make it easier to deliver better solutions. "Well thought-out ... addresses many of the key issues facing developers of bioinformatics software." (Simon Dear, Director, UK Technology and Development, Bioinformatics Engineering and Integration, Genetics Research, GlaxoSmithKline) Here are some examples from the book itself. On software development: “Writing software properly involves talking to people – often lots of people – and plenty of non-coding work on your part. It requires the ability to dream up new solutions to problems so complicated that they are hard to describe.” From description to specification: “Look for verbs – action words, such as ‘does’, ‘is’ and ‘views’. Identify nouns – naming words, like ‘user’, ‘home’ and ‘sequence’. List the adjectives – describing words, for example ‘quick’, ‘simple’ or ‘precise’. The verbs are the functions that must be provided by your application. The nouns define the parameters to those functions, and the adjectives specify the constraint conditions under which your program must operate.” On how to start writing software: “Handle errors. Take in data. Show output. Get going!” On testing: “It may not be physically possible to test every potential combination of situations that could occur as users interact with a program. But one thing that can be done is to test an application at the agreed extremes of its capability: the maximum number of simultaneous users it has to support, the minimum system configuration it must run on, the lowest communication speed it must cope with, and the most complex operations it must perform. If your program can cope with conditions at the edge of its performance envelope, it is less likely to encounter difficulties in dealing with less challenging situations.” On showing early versions of software to users: “It can be hard explaining the software development process to people who are unfamiliar with it. Code that to you is nearly finished is simply not working to them, and seeing their dream in bits on the workbench can be disappointing to customers, especially when they were expecting to be able to take it for a test drive.” On bugs: “If your users find a genuinely reproducible bug in production code, apologize, fix it fast, and then fix the system that allowed it through. And tell your customers what you are doing, and why, so they will be confident that it will not happen again. Everybody makes mistakes. Don’t make the same ones twice.” And one last thought on successful software development: "You have to be a detective, following up clues and examining evidence to discover what has gone wrong and why. And you have to be a politician, underst
Junior to Senior
Author: David Glassanos
Publisher: Holloway, Inc.
ISBN: 1952120519
Category : Computers
Languages : en
Pages : 214
Book Description
As a programmer, you've spent plenty of time learning technical and programming skills. Junior engineers-and even some who have been in it a long time-must constantly focus on improving their "hard" technical skills. But writing code is only part of our job as software developers. It's equally essential for developers to cultivate the soft skills critical for adding value for their team, their company, their customers, and their career-and it's often neglected. Junior to Senior is one of only a few books that gives practical advice on the soft skills needed to thrive as an engineer: · Dealing with lack of confidence · Learning from others and by reading unfamiliar code · Managing your time · Working effectively with your manager · Communicating clearly with business stakeholders and writing clear documentation · Understanding different ways to add value for a company and its customers · Managing risks and recovering from mistakes · Dealing with conflict · Balancing the demands of work and personal life ... and much more. Improvements in these areas are important milestones on the journey from junior to senior software developer. Junior to Senior is filled with insights, from one engineer to another, to guide you along that path. Whether you studied Computer Science, graduated from a coding bootcamp, or are a self-taught programmer, this book will help you manage yourself, build value, and earn the confidence of your team to take on roles with greater responsibility and impact.
Publisher: Holloway, Inc.
ISBN: 1952120519
Category : Computers
Languages : en
Pages : 214
Book Description
As a programmer, you've spent plenty of time learning technical and programming skills. Junior engineers-and even some who have been in it a long time-must constantly focus on improving their "hard" technical skills. But writing code is only part of our job as software developers. It's equally essential for developers to cultivate the soft skills critical for adding value for their team, their company, their customers, and their career-and it's often neglected. Junior to Senior is one of only a few books that gives practical advice on the soft skills needed to thrive as an engineer: · Dealing with lack of confidence · Learning from others and by reading unfamiliar code · Managing your time · Working effectively with your manager · Communicating clearly with business stakeholders and writing clear documentation · Understanding different ways to add value for a company and its customers · Managing risks and recovering from mistakes · Dealing with conflict · Balancing the demands of work and personal life ... and much more. Improvements in these areas are important milestones on the journey from junior to senior software developer. Junior to Senior is filled with insights, from one engineer to another, to guide you along that path. Whether you studied Computer Science, graduated from a coding bootcamp, or are a self-taught programmer, this book will help you manage yourself, build value, and earn the confidence of your team to take on roles with greater responsibility and impact.
Essential Software Development Career + Technical Guide
Author: Appjungle.net LLC
Publisher: Appjungle.net LLC
ISBN:
Category : Computers
Languages : en
Pages : 477
Book Description
Master the skills and knowledge you need to succeed as a software engineer with this comprehensive guide. Whether you're new to the field or a seasoned professional, this book covers all the essential software development topics to help you stay up-to-date and excel in your role. This comprehensive guide covers essential topics in software engineering/software development. Read this book If: You want to start OR have started a career in software engineering. You want to know about all the technical topics you need to succeed. You want to understand the entire process of software engineering. You want to learn what they will NOT teach you in school. You want to understand coding, multithreading, testing, and more! You would like to learn the soft skills you need for promotions. You want to know why you are NOT getting promoted. You want to understand deep technical topics, i.e., encryption+crypto. If you think your company is doing Agile wrong. After reading the book, you will: · Understand how to have a successful career in software engineering. · Have the technical knowledge to know how and where to grow. · Have the soft skills framework to help get you promoted and do your job exceptionally. · Understand how to make the best decisions · Understand the technology and psychology to excel Don't wait! Buy this book now! The field of software engineering is so vast there is no way anyone can learn it all. With hundreds of languages and technologies, what you choose can make the difference between getting a job or not. From just thinking about a career in software engineering to senior level and beyond, this book has you covered. This book covers career, soft skills, processes, and deep technical details on coding, testing, architecture, and much more! Learn about software engineering and management career paths. Don't make mistakes that you can avoid with a little knowledge. Take your engineering knowledge to the next level to help you get the promotions you desire. If you are or plan to be a self-taught software engineer or plan on taking computer science/programming classes, you need this book to help you on your path. Get answers to: What classes should you take in high school/college? Should you become a software engineer? What do Software Engineers / Developers / Programmers do? What kind of computer do you need? What industry sector should you work in? What don't they teach you in school? Should you do consulting vs. full-time? Do you need certifications? Should you use a staffing firm? What do software engineers do? How do I get a job? How do I get promoted? How do I understand what hardware does? How to become a Senior Software Engineer, Staff Software Engineer and more? How do I become a manager? Learn about: Agile with Scrum, Multithreading, Source Control, Working with a team, Architecture, Algorithms / Data Structures, Networking, File Systems, Overviews of the web, Unicode, Dependency Injection, Security, Privacy, Object Oriented Languages, Message tracing, Floating point number processing, User Interface Design, Time Management, Cryptocurrency, Encryption, Recursion, Databases, Support, Testing, and much more! If you are looking for one of the best software engineering books, software development books, computer science books, or programming books, this is the right book for you. If you are or are planning to be a software engineer, software developer, application engineer, front end developer, tech career, or IT career, this is the book for you. If you find errors in the book, please don't leave that in a review. Please tell us directly. Go to the website mentioned at the end of the book. If you find errors visit our website.
Publisher: Appjungle.net LLC
ISBN:
Category : Computers
Languages : en
Pages : 477
Book Description
Master the skills and knowledge you need to succeed as a software engineer with this comprehensive guide. Whether you're new to the field or a seasoned professional, this book covers all the essential software development topics to help you stay up-to-date and excel in your role. This comprehensive guide covers essential topics in software engineering/software development. Read this book If: You want to start OR have started a career in software engineering. You want to know about all the technical topics you need to succeed. You want to understand the entire process of software engineering. You want to learn what they will NOT teach you in school. You want to understand coding, multithreading, testing, and more! You would like to learn the soft skills you need for promotions. You want to know why you are NOT getting promoted. You want to understand deep technical topics, i.e., encryption+crypto. If you think your company is doing Agile wrong. After reading the book, you will: · Understand how to have a successful career in software engineering. · Have the technical knowledge to know how and where to grow. · Have the soft skills framework to help get you promoted and do your job exceptionally. · Understand how to make the best decisions · Understand the technology and psychology to excel Don't wait! Buy this book now! The field of software engineering is so vast there is no way anyone can learn it all. With hundreds of languages and technologies, what you choose can make the difference between getting a job or not. From just thinking about a career in software engineering to senior level and beyond, this book has you covered. This book covers career, soft skills, processes, and deep technical details on coding, testing, architecture, and much more! Learn about software engineering and management career paths. Don't make mistakes that you can avoid with a little knowledge. Take your engineering knowledge to the next level to help you get the promotions you desire. If you are or plan to be a self-taught software engineer or plan on taking computer science/programming classes, you need this book to help you on your path. Get answers to: What classes should you take in high school/college? Should you become a software engineer? What do Software Engineers / Developers / Programmers do? What kind of computer do you need? What industry sector should you work in? What don't they teach you in school? Should you do consulting vs. full-time? Do you need certifications? Should you use a staffing firm? What do software engineers do? How do I get a job? How do I get promoted? How do I understand what hardware does? How to become a Senior Software Engineer, Staff Software Engineer and more? How do I become a manager? Learn about: Agile with Scrum, Multithreading, Source Control, Working with a team, Architecture, Algorithms / Data Structures, Networking, File Systems, Overviews of the web, Unicode, Dependency Injection, Security, Privacy, Object Oriented Languages, Message tracing, Floating point number processing, User Interface Design, Time Management, Cryptocurrency, Encryption, Recursion, Databases, Support, Testing, and much more! If you are looking for one of the best software engineering books, software development books, computer science books, or programming books, this is the right book for you. If you are or are planning to be a software engineer, software developer, application engineer, front end developer, tech career, or IT career, this is the book for you. If you find errors in the book, please don't leave that in a review. Please tell us directly. Go to the website mentioned at the end of the book. If you find errors visit our website.