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How to generate and validate a software license key?

...After you find some keys or patches floating in astalavista.box.sk you'll know that you succeeded in making something popular enough that somebody bothered to crack. Rejoice! share | improve this an...
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Member '' cannot be accessed with an instance reference

...es of their class, so that they only have one value. The way it's defined now, there is no point in making any instances of your MyItem class. share | improve this answer | ...
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How to make --no-ri --no-rdoc the default for gem install?

...se don't post "first result on Google" replies. The first result on Google now shows your reply, self-proving why you shouldn't do this. Thanks, of course, for your answer. – wjl Sep 4 '11 at 7:52 ...
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How did I get a value larger than 8 bits in size from an 8-bit integer?

...w c: 127 // woop c: 126 c: 125 c: 124 c: 123 c: 122 Freaky ey? I don't know much about what the compiler does to expressions like i++ or i--. It's likely promoting the return value to an int and passing it. That's the only logical conclusion I can come up with because you ARE in fact getting valu...
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SQL Server Profiler - How to filter trace to only display events from one database?

...r Trace properties > Events Selection tab > select show all columns. Now under column filters, you should see the database name. Enter the database name for the Like section and you should see traces only for that database. ...
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How to format numbers as currency string?

...e notes on browser support and Node Browser support is no longer an issue nowadays with 97.5% support globally, 98% in the US and 99% in the EU There is a shim to support it on fossilized browsers (like IE8), should you really need to If you're using Node, you might need to install full-icu, see he...
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Why would you use String.Equals over ==? [duplicate]

...g str4 "String" {1#} string obj2 "String" {5#} object {string} Now look at {1#} and {5#} obj, str2, str4 and obj2 references are same. obj and obj2 are object type and others are string type Conclusion: com1: result = (obj == str2);// true compares object and string so performs a...
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CSS performance relative to translateZ(0)

...or transitions. But the Web has been catching up, and most browser vendors now provide graphical hardware acceleration by means of particular CSS rules. Using -webkit-transform: translate3d(0,0,0); will kick the GPU into action for the CSS transitions, making them smoother (higher FPS). Note: tran...
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Count number of matches of a regex in Javascript

... simply match on the string, like a standard string utility class method. Now, here you can see that I'm dealing with issues with the input. With the following: if (typeof re !== "string") { return 0; } I am ensuring that the input isn't anything like the literal 0, false, undefined, or null...
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Is there an advantage to use a Synchronized Method instead of a Synchronized Block?

... I know this is an old question but synchronizing on "this" is considered in some circles to be an anti-pattern. The unintended consequence is that outside of the class someone can lock on an object reference that is equal to "t...