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How many threads is too many?

...sure, don't guess. One suggestion is to make it configurable and initially set it to 100, then release your software to the wild and monitor what happens. If your thread usage peaks at 3, then 100 is too much. If it remains at 100 for most of the day, bump it up to 200 and see what happens. You co...
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Creating a left-arrow button (like UINavigationBar's “back” style) on a UIToolbar

...tor(backAction) forControlEvents:UIControlEventTouchUpInside]; [backButton setTitle:@"Back" forState:UIControlStateNormal]; // create button item -- possible because UIButton subclasses UIView! UIBarButtonItem* backItem = [[UIBarButtonItem alloc] initWithCustomView:backButton]; // add to toolbar, ...
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Array slicing in Ruby: explanation for illogical behaviour (taken from Rubykoans.com)

...il return. It then goes on and returns an empty array if the second arg is set to zero. while if 5 is passed in, there are not 5 elements in the array, so it returns nil before the zero arg is evaluated. code here at line 944. I believe this to be a bug, or at least unpredictable and not the 'Princ...
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Best practice for localization and globalization of strings and labels [closed]

...uer.” It goes like this: Conceptualize the specific problem as a set of smaller sub-problems. Solve each smaller problem. Combine the results into a solution of the specific problem. But “divide and conquer” is not the only possible strategy. We can also take a more genera...
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Convert light frequency to RGB?

Does anyone know of any formula for converting a light frequency to an RGB value? 9 Answers ...
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Syntax Error: Not a Chance

... editor after snippets, if snippets enabled if (StackExchange.settings.snippets.snippetsEnabled) { StackExchange.using("snippets", function() { createEditor(); }); } else { createEditor(); ...
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Rails 4 - Strong Parameters - Nested Objects

... This only permits ONE set of nested attributes. This will not work in the case of a one to many. – AKWF Mar 10 '18 at 0:54 ...
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Virtual Memory Usage from Java under Linux, too much memory used

...largely meaningless, except when it isn't (see below). RES is the resident set size: the number of pages that are currently resident in RAM. In almost all cases, this is the only number that you should use when saying "too big." But it's still not a very good number, especially when talking about Ja...
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Open Cygwin at a specific folder

...l Cygwin (or if you’ve already installed it, download it again and start setup again to run an update), make sure that you select the chere package under the "Shells" category. After Cygwin is launched, open up a Cygwin terminal (as an administrator) and type the command: chere -i -t mintty -s ba...
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C# declare empty string array

I need to declare an empty string array and i'm using this code 9 Answers 9 ...