Learning React: Functional Web Development with React and by Alex Banks, Eve Porcello

By Alex Banks, Eve Porcello

Interested in React yet end up stressed approximately the best way to use it with the Flux structure? this is often your e-book. Authors Alex Banks and Eve Porcello assist you construct React functions with the whole React ecosystem—including Flux. You’ll find out about the methodologies in the back of the construction of the library and its similar instruments via brief interviews with key gamers within the React community.

Learning React is perfect for internet builders and software program engineers who know the way JavaScript, CSS, and HTML paintings within the browser, yet don't have any past realizing of React, useful JavaScript, Flux, or perhaps complex JavaScript. This ebook covers either ES5 or ES6 syntax accepted with React.

Alex Banks and Eve Porcello are skilled software program engineers, company running shoes, and Lynda.com authors.

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Extra resources for Learning React: Functional Web Development with React and Redux

Sample text

This rate color function is bad for business because it changing the original color. You would hope that a business would use enough common sense to make a copy of your birth certificate and return the original unharmed. We can rewrite the rateColor function so that it does not harm the original goods, the color object. assign to change the color rating. assign is the copy machine. It takes a blank object, copies the color to that object, and overwrites the rating on the copy. Now we can have a newly rated color object without having to change the original.

More on declarative programming in the next chapter. Values can also be destructured from arrays. log(firstResort) // Kirkwood You can also pass over unnecessary values with list matching using commas. List matching occurs when commas take the place of elements that should be skipped. With the same array, we can access the last value by replacing the first two values with commas. log(thirdResort) // Alpine Later in the section, we’ll take this example a step further by combining array destructur‐ ing and the spread operator.

The final tool that that we need in our functional arsenal is the abil‐ ity to transform arrays into primitives and other objects. The reduce and reduceRight function can be used to transform an array into any value. Any value means a number, string, boolean, object, or even function. Let’s say we needed to find the maximum number in an array of numbers. We need to transform an array into a number; therefore, we can use reduce. log('maxAge', maxAge); // // // // // // // // 21 > 0 = true 18 > 21 = false 42 > 21 = true 40 > 42 = false 64 > 42 = true 63 > 64 = false 34 > 64 = false maxAge 64 The ages array has been reduced into a single value: the maximum age: 64.

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