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How do I delete rows in a data frame?

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Convert string to binary in python

... = "hello world" >>> ' '.join(format(ord(x), 'b') for x in st) '1101000 1100101 1101100 1101100 1101111 100000 1110111 1101111 1110010 1101100 1100100' #using `bytearray` >>> ' '.join(format(x, 'b') for x in bytearray(st, 'utf-8')) '1101000 1100101 1101100 1101100 1101111 100000 1...
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How to clear the interpreter console?

... | edited Aug 6 '18 at 17:02 angelo.mastro 61366 silver badges88 bronze badges answered Feb 5 '09 at 21:...
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Passing an array to a query using a WHERE clause

... answered May 25 '09 at 19:37 Flavius StefFlavius Stef 12.9k22 gold badges2323 silver badges2222 bronze badges ...
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Activity transition in Android

...edited Feb 27 '19 at 3:24 gian1200 3,49522 gold badges2525 silver badges5555 bronze badges answered Aug 2 '10 at 16:09 ...
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What does a lazy val do?

...not sure if it is later used. scala> class X { val x = { Thread.sleep(2000); 15 } } defined class X scala> class Y { lazy val y = { Thread.sleep(2000); 13 } } defined class Y scala> new X res5: X = X@262505b7 // we have to wait two seconds to the result scala> new Y res6: Y = Y@1555b...
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Given a number, find the next higher number which has the exact same set of digits as the original n

... answered Feb 20 '12 at 21:23 BlueRaja - Danny PflughoeftBlueRaja - Danny Pflughoeft 72.2k2525 gold badges169169 silver badges251251 bronze badges ...
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Stop “developer tools access needs to take control of another process for debugging to continue” ale

I recently upgraded to 10.7.3, and when I try to debug my iOS project in the simulator for the first time after logging in, I'm prompted with the following two alerts: ...
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Create nice column output in python

... answered Apr 3 '12 at 8:10 Shawn ChinShawn Chin 70.3k1717 gold badges149149 silver badges182182 bronze badges ...