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Equation for testing if a point is inside a circle

If you have a circle with center (center_x, center_y) and radius radius , how do you test if a given point with coordinates (x, y) is inside the circle? ...
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How to undo the effect of “set -e” which makes bash exit immediately if any command fails?

...very last lines of corresponding manual page (faqs.org/docs/bashman/bashref_56.html) which I didn't read to the end. – Tianyi Cui Aug 18 '10 at 22:22 ...
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How do Google+ +1 widgets break out of their iframe?

...pect that element then you'll get an iframe src for plusone.google.com/u/0/_/+/fastbutton?url=... This iframe contains the CSRF token for submitting to google+. – rook Sep 6 '11 at 0:50 ...
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Difference between var_dump,var_export & print_r

What is the difference between var_dump , var_export and print_r ? 2 Answers 2 ...
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How to open the Chrome Developer Tools in a new window?

...l the "Unlock into separate window" option. – katalin_2003 Nov 6 '14 at 21:48 5 ...
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How to create own dynamic type or dynamic object in C#?

... new List<string>(); // my 'columns' fields.Add("this_thing"); fields.Add("that_thing"); fields.Add("the_other"); dynamic exo = new System.Dynamic.ExpandoObject(); foreach (string field in fields) { ((IDictionary<String, ...
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Is there a zip-like function that pads to longest length in Python?

... In Python 3 you can use itertools.zip_longest >>> list(itertools.zip_longest(a, b, c)) [('a1', 'b1', 'c1'), (None, 'b2', 'c2'), (None, 'b3', None)] You can pad with a different value than None by using the fillvalue parameter: >>> list(iter...
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Convert DataFrame column type from string to datetime, dd/mm/yyyy format

... The easiest way is to use to_datetime: df['col'] = pd.to_datetime(df['col']) It also offers a dayfirst argument for European times (but beware this isn't strict). Here it is in action: In [11]: pd.to_datetime(pd.Series(['05/23/2005'])) Out[11]: 0 ...
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What is the “main file” property when doing bower init?

...ts/glyphicons-halflings-regular.woff" ], "ignore": [ "**/.*", "_config.yml", "CNAME", "composer.json", "CONTRIBUTING.md", "docs", "js/tests" ], "dependencies": { "jquery": ">= 1.9.0" } } When I build in Brunch, it pulls these files from my bower_compone...
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How to access test resources in Scala?

...le methods that Java provides. Given your example of data.xml being in $SBT_PROJECT_HOME/src/test/resources/, you can access it in a test like so: import scala.io.Source // The string argument given to getResource is a path relative to // the resources directory. val source = Source.fromURL(getCla...