Simple .NET/ASP.NET PDF document editor web control SDK

You ve learned a lot about making functions and calling them You also know that functions can call other functions What might come as a surprise is that functions can call themselves If you haven t encountered this sort of thing before, you may wonder what this word recursion is It simply means referring to (or, in our case, calling ) yourself A humorous definition goes like this: re cur sion \ri- k&r-zh&n\ n: see recursion Recursive definitions (including recursive function definitions) include references to the term they are defining Depending on the amount of experience you have with it, recursion can be either mind-boggling or quite straightforward For a deeper understanding of it, you should probably buy yourself a good textbook on computer science, but playing around with the Python interpreter can certainly help.

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Sometimes the content of the story template is an intellectual mismatch with the audience, or the wording is too simplistic or not simple enough At times the storyboard graphics are an aesthetic mismatch, or the delivery style does not connect with the audience If any of these might be an issue, discuss the situation with your team and with your audience, if possible to gure out what happened, and then return to the story template, the storyboard, the ground rules, and your audience research However, you might present a perfectly good BBP presentation and still nd that the audience is resistant to your approach.

When you waited for your threads to finish by using the join method, you could have specified a timeout value (in seconds) for which to wait. If the thread doesn t finish within that time, join returns nil. Here s an example where each thread is given only one second to execute:

threads.each do |thread| puts "Thread #{thread.object_id} didn't finish within 1s" unless thread.join(1) end

For example, if you give your rst BBP presentation to a group where there is a strong bullet point culture, their immediate response might be Where are the bullet points that we expect or This is too simplistic where s the text If you expect you might get that reaction, prepare the audience in advance for what is about to come Bring handouts of the notes pages, and pass them out while you verbally assure your audience that the detailed information is available here in printed format instead of on the slides Assure them that you respect their time so much, you have done a great deal of advance work to identify only the most important information they need to know so that you don t waste their time BBP is a huge shift in thinking and action, and it can represent a threat to existing political structures within organizations.

It s possible to get a global list of all threads running within your program using Thread.list. In fact, if you didn t want to keep your own store of threads, you could

In general, you don t want recursive definitions like the humorous one of the word recursion because you won t get anywhere You look up recursion, which again tells you to look up recursion, and so on A similar function definition would be def recursion(): return recursion() It is obvious that this doesn t do anything it s just as silly as the mock dictionary definition But what happens if you run it You re welcome to try: The program simply crashes (raises an exception) after a while Theoretically, it should simply run forever However, each time a function is called, it uses up a little bit of memory, and after enough function calls have been made (before the previous calls have returned), there is no more room, and the program ends with the error message maximum recursion depth exceeded.

rewrite the earlier example from the section Basic Ruby Threads in Action down to these two lines:

Some of the examples in this chapter demonstrate that there are deeply ingrained PowerPoint habits and cultures, and there can be a great deal of resistance to doing anything differently from what is normally done Often the objections to BBP have nothing to do with the methodology or the content of a presentation but instead are attempts to demonstrate an audience member s power by publicly raising doubts about the presenter s credibility In other cases, using BBP well can make others feel uncomfortable that they don t know something that you do, and so as a result, they might try to undermine you..

10.times { Thread.new { 10.times { |i| print i; $stdout.flush; sleep rand(2) } } } Thread.list.each { |thread| thread.join }