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

However, the Array class (for one) has preincluded the methods provided by the Enumerable module, a module that supplies about 20 useful counting- and iterationrelated methods, including collect, detect, find, find_all, include , max, min, select, sort, and to_a. All of these use Array s each method to do their jobs, and if your class can implement an each method, you can include Enumerable, and get all those methods for free in your own class!

Start irb (or fxri) and make sure a prompt appears, like so:

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PE O PLE SAY a picture is worth a thousand words, but if you re not a professional illustrator, where exactly do you get that picture Turning words into visuals can be a daunting task for anybody, especially if you re used to putting mostly bullet points on your Microsoft Of ce PowerPoint slides. Fortunately, you ve already done signi cant work to prepare the way for this moment you have in hand a storyboard that includes all the slides in your presentation, and each slide includes a sketch that indicates the speci c graphic you want to add. As always with the Beyond Bullet Points (BBP) approach, your focus is on helping your audience effectively understand new information, so your next task is to add the speci c graphics to the storyboard that help make your visual point on each slide, without overwhelming the working memory of your audience with excessive new visual information.

This prompt is not as complex as it looks. All it means is that you re in the irb program, you re typing your first line (001), and you re at a depth of 0. You don t need to place any importance on the depth element at this time. Type this after the preceding prompt and press Enter:

Here it is obvious that the two lists are equal but not identical. To summarize: Use == to see if two objects are equal, and use is to see if they are identical (the same object).

1 + 1

Review the three ground rules for adding graphics. Apply custom layouts to the different sections of the storyboard. Add graphics to every slide of your storyboard.

The result should come back quickly: 2. The entire process looks like this:

Ruby is now ready to accept another command from you. As a new Ruby programmer, you ll spend a lot of time in irb testing concepts and building up insights into Ruby. It provides the perfect environment for tweaking and testing the language, as you cannot do any real damage from within irb. If you explicitly ask

Like completing the story template, adding nal graphics to your storyboard is both easy and hard. It s easy because all you need to do is use your sketch as a guide to ll in the blank below the headline on each slide with the graphic that the sketch describes. But it s also hard because you have a potentially unlimited range

Ruby to erase files on your drive, of course, that can happen, but you re not susceptible to crashing your computer or harming other programs. irb s interactive environment also gives you the benefit of immediate feedback an essential tool when learning. Rather than writing a program in a text editor, saving it, getting the computer to run it, and then looking through the errors to see where you went wrong, you can just type in small snippets of code, hit Enter, and immediately see what happens. If you want to experiment further, try other arithmetic such as 100 * 5, 57 + 99, or 10 50 (note that the division symbol/operator on a computer is the forward slash / ).

Caution Avoid the use of is with basic, immutable values such as numbers and strings. The result is