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Download Agile Web Development with Rails (4th edition) by Dave Thomas, David Heinemeier Hansson, Sam Ruby PDF

By Dave Thomas, David Heinemeier Hansson, Sam Ruby

Ruby on Rails is helping you produce top of the range, beautiful-looking internet functions fast. you think about developing the appliance, and Rails looks after the details.

Tens of millions of builders have used this award-winning publication to profit Rails. It's a extensive, far-reaching educational and reference that's urged via the Rails middle crew. If you're new to Rails, you'll get step by step suggestions. If you're an skilled developer, this booklet offers you the great, insider details you need.

Rails has developed through the years, and this booklet has advanced in addition to it. We nonetheless begin with a step by step walkthrough of establishing a true program, and in-depth chapters examine the integrated Rails gains. This variation now supplies new Ruby and Rails clients additional information at the Ruby language and takes extra time to provide an explanation for key techniques all through. top practices on tips to practice Rails proceed to alter, and this variation retains up. Examples use cookie sponsored classes, HTTP authentication, and lively Record-based varieties, and the e-book focuses all through at the correct method to use Rails. also, this version now displays Ruby 1.9, a brand new unencumber of Ruby with significant useful and function improvements.

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Extra resources for Agile Web Development with Rails (4th edition)

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The commands that allow numerical approximation are the following: format long Delivers results to 16 significant decimal figures. format short Delivers results to 4 decimal places. This is MATLAB’s default format. format long e Provides the results to 16 decimal figures more than the power of 10 required. format short e Provides the results to four decimal figures more than the power of 10 required. format long g Provides the results in optimal long format. (continued) 38 CHAPTER 2 N VARIABLES, NUMBERS, OPERATORS AND FUNCTIONS format short g Provides the results in optimum short format.

A([a b],[c d]) Defines the subarray of A formed by the intersection of the a-th through b-th rows and c-th through d-th columns, inclusive. ]) Defines the subarray of A formed by the intersection of rows a, b, c,…and columns e, f, g,… A(:,c:d) Defines the subarray of A formed by all the rows in A and the c-th through to the d-th columns. ]) Defines the subarray of A formed by all the rows in A and columns c, d, e,… A(a:b,:) Defines the subarray of A formed by all the columns in A and the a-th through to the b-th rows.

Less than (for complex numbers this applies only to the real parts) <= Less than or equal (only applies to real parts of complex numbers) > Greater than (only applies to real parts of complex numbers) >= Greater than or equal (only applies to real parts of complex numbers) x == y Equality (also applies to complex numbers) x~=y Inequality (also applies to complex numbers) Logical Operators MATLAB provides symbols to denote logical operators. The logical operators shown in the following table offer a way to combine or negate relational expressions.

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