By Scott Meyers

“Every C++ expert wishes a duplicate of powerful C++. it truly is an absolute must-read for somebody taking into consideration doing critical C++ improvement. If you’ve by no means learn powerful C++ and also you imagine you recognize every thing approximately C++, imagine again.”
— Steve Schirripa, software program Engineer, Google

“C++ and the C++ group have grown up within the final fifteen years, and the 3rd variation of powerful C++ displays this. The transparent and distinct form of the e-book is proof of Scott’s deep perception and targeted skill to impart knowledge.”
— Gerhard Kreuzer, study and improvement Engineer, Siemens AG

The first versions of potent C++ have been embraced via thousands of programmers world wide. the reason being transparent: Scott Meyers’ sensible method of C++ describes the principles of thumb utilized by the specialists — the issues they mainly do or mainly steer clear of doing — to supply transparent, right, effective code.

The ebook is equipped round fifty five particular guidance, each one of which describes the way to write greater C++. every one is sponsored through concrete examples. For this 3rd variation, greater than part the content material is new, together with further chapters on handling assets and utilizing templates. themes from the second one variation were greatly revised to mirror sleek layout concerns, together with exceptions, layout styles, and multithreading.

Important positive factors of powerful C++ include:

Expert counsel at the layout of powerful sessions, features, templates, and inheritance hierarchies.

Applications of latest “TR1” general library performance, besides comparisons to latest common library components.

Insights into ameliorations among C++ and different languages (e.g., Java, C#, C) that aid builders from these languages assimilate “the C++ way” of doing issues.

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Additional resources for Effective C++: 55 Specific Ways to Improve Your Programs and Designs (3rd Edition)

Sample text

I wrote the outside function to return true if the position specified by the last two parameters was outside the rectangle indicated by the first four parameters. The qx,qy point is the upper left corner. qwidth is the width at the widest point and qheight is the total height. I thought of this as a quick check that would return false most of the time. The next two if statements determine if the mx,my point is contained in either circle. That is, I again use the comparison of the square of the distance from mx,my to the center of each arc to the stored radsq attribute.

You can think of it as stop-motion photography. Changing the virtual ball was necessary because of its complexity: an image from a video clip and an all-white mask. I include the code for the trajectory program in the “Building the Application and Making It Your Own” section. 54 CHAPTER 3 ■ BOUNCING VIDEO: ANIMATING AND MASKING HTML5 VIDEO Figure 3-2. Trajectory of virtual ball If I resize the browser window to be a little bit smaller and reload the application, the code will resize the canvas to produce what is shown in Figure 3-3: a smaller box.

However, for outside I chose to use the OR operator, ||, and to return its value. This will be true if any of the factors are true and false otherwise. function outside(x,y,w,h,mx,my) { return ((mx (x+w)) || (my < y) || (my > (y+h))); } Actually, what I said was true, but misses what could be an important consideration if performance is an issue. The || evaluates each of the conditions starting from the first (leftmost) one. As soon as one of them is true, it stops evaluating and returns true.

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