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The main aim of this book is to teach D to readers who are new to computer programming. Although having experience in other programming languages is certainly helpful, this book starts from the basics. D is a multi-paradigm system programming language that combines a wide range of powerful programming concepts from the lowest to the highest levels. It has C-like syntax and static typing. It pragmatically combines efficiency, control, and modeling power, with safety and programmer productivity in mind. Each chapter is based on the contents of the previous ones, introducing as few new concepts as possible. It is recommended that the book is read in linear fashion, without skipping chapters if possible. Although this book was written with beginners in mind, it covers almost all features of D. More experienced programmers can use the book as a D language reference by starting from the index section. Blurbs from the back cover: "D is pristine, clean, immensely powerful, and arguably the actual state-of-the-art programming language. Ali's book is a gem. Clear, concise, and complete." - Olivier Henley "I have been using Ali's online D book to teach D at the university level. It is up-to-date, complete, and most importantly, extremely readable. Having a print version is even better! This is now the 'go-to' book for learning D programming." - Chuck Allison, Professor and Chair, Computer Science Department, Utah Valley University "Ali's explanations are succinct and on target. I like that he provides rationale for why D was designed in a particular way and how I can use it most effectively. This is the best computer language book I've read." - Robbin Carlson, Luthier and Enterprise Architect "I taught a CS2 Data Structures class in D with more success and student appreciation than when using either C++ or Java as it's an ideal language to express the relevant concepts at all scales, from detailed to big picture, without needless complexity. Ali Çehreli's tutorial played a central role supporting students especially during the first half of the course - without it the course simply would not have worked, so "many thanks Ali" - and an important part of that is its linearity - it can be read with only backward dependencies. This meant that with hard work even students of little experience and only moderate current abilities could get up to speed, and we saw just that. It is hard to overstate this factor. I unreservedly recommend this book to all." - Dr. Carl Sturtivant, University of Minnesota Department of Computer Science & Engineering "This book is one of the best guides through the language that I've seen." - Andrew Wray, D Enthusiast "I encourage anyone considering D to read this book. Not exactly 'D for Dummies' but it's easy to follow even if you don't have much experience with compiled languages." - bachmeier, Reddit user "Having worked through the book, I have to say this is one of the easiest to follow and distraction free read there is and the fact that it made learning a new language a total breeze really impressed me." - Imran Khan, Student
"Do not think of the Pennsylvania Railroad as a business enterprise," Forbes magazine informed its readers in May 1936. "Think of it as a nation." At the end of the nineteenth century, the Pennsylvania Railroad was the largest privately owned business corporation in the world. In 1914, the PRR employed more than two hundred thousand people—more than double the number of soldiers in the United States Army. As the self-proclaimed "Standard Railroad of the World," this colossal corporate body underwrote American industrial expansion and shaped the economic, political, and social environment of the United States. In turn, the PRR was fundamentally shaped by the American landscape, adapting to geography as well as shifts in competitive economics and public policy. Albert J. Churella's masterful account, certain to become the authoritative history of the Pennsylvania Railroad, illuminates broad themes in American history, from the development of managerial practices and labor relations to the relationship between business and government to advances in technology and transportation. Churella situates exhaustive archival research on the Pennsylvania Railroad within the social, economic, and technological changes of nineteenth- and twentieth-century America, chronicling the epic history of the PRR intertwined with that of a developing nation. This first volume opens with the development of the Main Line of Public Works, devised by Pennsylvanians in the 1820s to compete with the Erie Canal. Though a public rather than a private enterprise, the Main Line foreshadowed the establishment of the Pennsylvania Railroad in 1846. Over the next decades, as the nation weathered the Civil War, industrial expansion, and labor unrest, the PRR expanded despite competition with rival railroads and disputes with such figures as Andrew Carnegie and John D. Rockefeller. The dawn of the twentieth century brought a measure of stability to the railroad industry, enabling the creation of such architectural monuments as Pennsylvania Station in New York City. The volume closes at the threshold of American involvement in World War I, as the strategies that PRR executives had perfected in previous decades proved less effective at guiding the company through increasingly tumultuous economic and political waters.