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How to filter rows in pandas by regex

... Use contains instead: In [10]: df.b.str.contains('^f') Out[10]: 0 False 1 True 2 True 3 False Name: b, dtype: bool share | improve th...
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MySQL: Can't create table (errno: 150)

...d keys, as stated earlier. If these are not satisfied, MySQL returns Error 1005 and refers to Error 150 in the error message, which means that a foreign key constraint was not correctly formed. Similarly, if an ALTER TABLE fails due to Error 150, this means that a foreign key definition would be inc...
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Determine what attributes were changed in Rails after_save callback?

... answered Oct 5 '10 at 8:09 Radek PavienskyRadek Paviensky 7,18622 gold badges2626 silver badges1414 bronze badges ...
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Android Studio Editor Font Sizing

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How to remove leading zeros using C#

... | edited Aug 12 '13 at 10:26 SeanCocteau 1,6761717 silver badges2525 bronze badges answered Aug 10 '1...
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What is the JavaScript convention for no operation?

... Function.prototype(); console.log('End : ', Date.now()); }, 1000); Although this is a "true noop" since most browsers seem to do nothing to execute the noop defined this way (and hence save CPU cycles), there might be some performance issues associated with this (as is also mention...
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How to disable Golang unused import error

... | edited Jul 10 '18 at 17:56 Martin Tournoij 22.1k1717 gold badges8585 silver badges116116 bronze badges ...
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How to trigger the onclick event of a marker on a Google Maps V3?

... +100 I've found out the solution! Thanks to Firebug ;) //"markers" is an array that I declared which contains all the marker of the map ...
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Entity Framework 6 Code first Default value

... answered Jan 13 '15 at 10:32 gdbdablegdbdable 4,09733 gold badges2626 silver badges4141 bronze badges ...
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How to change menu item text dynamically in Android

... menu.Clear (); if (TabActual == TabSelec.Anuncio) { menu.Add(10, 11, 0, "Crear anuncio"); menu.Add(10, 12, 1, "Modificar anuncio"); menu.Add(10, 13, 2, "Eliminar anuncio"); menu.Add(10, 14, 3, "Actualizar"); } if (TabActual == TabSelec.Fotos) { menu...