Unlike some other reproductions of classic texts (1) We have not used OCR(Optical Character Recognition), as this leads to bad quality books with introduced typos. (2) In books where there are images such as portraits, maps, sketches etc We have endeavoured to keep the quality of these images, so they represent accurately the original artefact. Although occasionally there may be certain imperfections with these old texts, we feel they deserve to be made available for future generations to enjoy.

Asynchronous JavaScript is everywhere, whether you're using Ajax, AngularJS, Node.js, or WebRTC. This practical guide shows intermediate to advanced JavaScript developers how Promises can help you manage asynchronous code effectively-including the inevitable flood of callbacks as your codebase grows. You'll learn the inner workings of Promises and ways to avoid difficulties and missteps when using them. The ability to asynchronously fetch data and load scripts in the browser broadens the capabilities of JavaScript applications. But if you don't understand how the async part works, you'll wind up with unpredictable code that's difficult to maintain. This book is ideal whether you're new to Promises or want to expand your knowledge of this technology. Understand how async JavaScript works by delving into callbacks, the event loop, and threading Learn how Promises organize callbacks into discrete steps that are easier to read and maintain Examine scenarios you'll encounter and techniques you can use when writing real-world applications Use features in the Bluebird library and jQuery to work with Promises Learn how the Promise API handles asynchronous errors Explore ECMAScript 6 language features that simplify Promise-related code

A vastly informative and rare early-American pioneer autobiography rescued from obscurity. In this remarkable memoir, Daniel Parker (1781-1861) recorded both the details of everyday life and the extraordinary historical events he witnessed west of the Appalachian Mountains between 1790 and 1840. Once a humble traveling salesman for a line of newly invented clothes washing machines, he became an outspoken advocate for abolition and education. With his wife and son, he founded Clermont Academy, a racially integrated, coeducational secondary school--the first of its kind in Ohio. However, Parker's real vocation was as a self-ordained, itinerant preacher of his own brand of universal salvation. Raised by Presbyterian parents, he experienced a dramatic conversion to the Halcyon Church, an alternative, millenarian religious movement led by the enigmatic prophet Abel Sarjent, in 1803. After parting ways with the Halcyonists, he continued his own biblical and theological studies, arriving at the universalist conclusions that he would eventually preach throughout the Ohio River Valley. David Torbett has transcribed Parker's manuscript and publishes it here for the first time, together with an introduction, epilogue, bibliography, and extensive notes that enrich and contextualize this rare pioneer autobiography.