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Is it safe to use -1 to set all bits to true?

... 20 Answers 20 Active ...
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Multiple dex files define Landroid/support/v4/accessibilityservice/AccessibilityServiceInfoCompat

... 305 Run gradle -q dependencies (or gradle -q :projectName:dependencies) to generate a dependency re...
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Truncating floats in Python

...ng''' s = '{}'.format(f) if 'e' in s or 'E' in s: return '{0:.{1}f}'.format(f, n) i, p, d = s.partition('.') return '.'.join([i, (d+'0'*n)[:n]]) This is valid in Python 2.7 and 3.1+. For older versions, it's not possible to get the same "intelligent rounding" effect (at lea...
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How to access pandas groupby dataframe by key

...group method: In [21]: gb.get_group('foo') Out[21]: A B C 0 foo 1.624345 5 2 foo -0.528172 11 4 foo 0.865408 14 Note: This doesn't require creating an intermediary dictionary / copy of every subdataframe for every group, so will be much more memory-efficient that creating...
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Select random row from a sqlite table

... answered Feb 17 '10 at 10:06 Adriaan StanderAdriaan Stander 146k2626 gold badges261261 silver badges272272 bronze badges ...
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Detect Browser Language in PHP

...e and clean <?php $lang = substr($_SERVER['HTTP_ACCEPT_LANGUAGE'], 0, 2); $acceptLang = ['fr', 'it', 'en']; $lang = in_array($lang, $acceptLang) ? $lang : 'en'; require_once "index_{$lang}.php"; ?> ...
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Subscripts in plots in R

... answered Apr 14 '12 at 19:05 smusmu 7,04722 gold badges1616 silver badges1414 bronze badges ...
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How to get the type of a variable in MATLAB?

... answered Feb 23 '09 at 17:36 Daniel LeCheminantDaniel LeCheminant 47.3k1515 gold badges115115 silver badges113113 bronze badges ...
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Get the current year in JavaScript

...ily: sans-serif; } <footer> © <span id="year">2018</span> by FooBar </footer> share | improve this answer | follow ...
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Regular expression for first and last name

... 202 Don't forget about names like: Mathias d'Arras Martin Luther King, Jr. Hector Sausage-Hausen ...