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Rotating a point about another point (2D)

...nt { public double X; public double Y; public string Print(){ return $"{X},{Y}"; } } } Ps: Apparently I can’t comment, so I’m obligated to post it as an answer ... s...
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Difference between Covariance & Contra-variance

...rable<out T>, Func<out T> You can convert from IEnumerable<string> to IEnumerable<object>, or Func<string> to Func<object>. Values only come out from these objects. It works because if you're only taking values out of the API, and it's going to return something ...
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Understanding Apache's access log

...ny is present, and "-" otherwise. User-agent is the browser identification string. The complete(?) list of formatters can be found here. The same section of the documentation also lists other common log formats; readers whose logs don't look quite like this one may find the pattern their Apache co...
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jQuery - Add ID instead of Class

...)); }); }); So you are changing/overwriting the id of three elements and adding an id to one element. You can modify as per you needs... share | improve this answer | f...
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How to detect idle time in JavaScript elegantly?

...the end of an expression statement are optional and you can in fact pass a string to setInterval, which then gets evaluated as JavaScript. – Felix Kling Nov 17 '13 at 17:51 ...
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Your content must have a ListView whose id attribute is 'android.R.id.list'

... Rename the id of your ListView like this, <ListView android:id="@android:id/list" android:layout_width="fill_parent" android:layout_height="fill_parent"/> Since you are using ListActivity your xml file must specify the keyword android while mentioning to a ID. I...
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How does the HyperLogLog algorithm work?

...n be of different sizes. One element can be 1 another element "is this big string". So if you have a huge list (or a huge stream of elements) it will take a lot memory. Probabilistic Counting How can one get a reasonable estimate of a number of unique elements? Assume that you have a string of l...
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What is the result of % in Python?

... Somewhat off topic, the % is also used in string formatting operations like %= to substitute values into a string: >>> x = 'abc_%(key)s_' >>> x %= {'key':'value'} >>> x 'abc_value_' Again, off topic, but it seems to be a little document...
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Echo newline in Bash prints literal \n

... echo $'hello\nworld' prints hello world $'' strings use ANSI C Quoting: Words of the form $'string' are treated specially. The word expands to string, with backslash-escaped characters replaced as specified by the ANSI C standard. ...
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What is the purpose of “!” and “?” at the end of method names?

... just looks weird. In your example, name.reverse evaluates to a reversed string, but only after the name.reverse! line does the name variable actually contain the reversed name. name.is_binary_data? looks like "is name binary data?". ...