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Why historically do people use 255 not 256 for database field magnitudes?

...ric reason why? I assume it's something to do with paging / memory limits, and performance but the distinction between 255 and 256 has always confused me. ...
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Random Number Between 2 Double Numbers

Is it possible to generate a random number between 2 doubles? 12 Answers 12 ...
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Getting activity from context in android

...ve a Context in the layout, but you will know it is actually your Activity and you can cast it so that you have what you need: Activity activity = (Activity) context; share | improve this answer ...
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Revert to Eclipse default settings

...nces>Java>Editor. Click on Syntax Coloring. Click "Restore Defaults" and "Apply". Then, navigate to General>Editors. Click on Text Editors. Click on "Restore Defaults" and "Apply". I had the same issue and the above steps cleared up my problem. Also, the Show line numbers check box is on t...
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What is null in Java?

...ceof operator is true if the value of the RelationalExpression is not null and the reference could be cast to the ReferenceType without raising a ClassCastException. Otherwise the result is false. This means that for any type E and R, for any E o, where o == null, o instanceof R is always false. ...
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How to calculate a Mod b in Casio fx-991ES calculator

...ect ab/c (number 1). Now do your calculation (in comp mode), like 50 / 3 and you will see 16 2/3, thus, mod is 2. Or try 54 / 7 which is 7 5/7 (mod is 5). If you don't see any fraction then the mod is 0 like 50 / 5 = 10 (mod is 0). The remainder fraction is shown in reduced form, so 60 / 8 will r...
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Xcode + remove all breakpoints

...+6, in Xcode3 press CMD(⌘)+ALT+B. Select all breakpoints with CMD(⌘)+A and delete them, like deleting text, with backspace. There's no step 3 :) share | improve this answer | ...
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Span inside anchor or anchor inside span or doesn't matter?

I want to nest span and a tags. Should I 10 Answers 10 ...
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C programming in Visual Studio

...t menu I can choose between Visual Basic, Visual C#, Visual C++, Visual F# and others but I don't see "C" or "Visual C". 6 ...
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How can I determine what font a browser is actually using to render some text?

...ecause it was from 4 years ago. The fact that old answers linger like this and the community cannot update them is one of the few remaining failures of Stack Overflow. share | improve this answer ...