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Delete rows from a pandas DataFrame based on a conditional expression involving len(string) giving K
...np.random.randn(int(1e6))})
test = test.drop(test[test.x > 0].index)
# 194 ms ± 7.03 ms per loop (mean ± std. dev. of 7 runs, 10 loops each)
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Creating a zero-filled pandas data frame
...taFrame(0, index = np.arange(10), columns=columns)
10000 loops, best of 3: 110 µs per loop
In [5]: temp = np.zeros((10, 10))
In [6]: %timeit d = pd.DataFrame(temp, columns=columns)
10000 loops, best of 3: 95.7 µs per loop
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Can I draw rectangle in XML?
...ground_shape">
<stroke android:width="2dp" android:color="#ff207d94" />
<padding android:left="2dp"
android:top="2dp"
android:right="2dp"
android:bottom="2dp" />
<corners android:radius="5dp" />
<solid android:color="#ffffffff" />
&l...
How to use Bash to create a folder if it doesn't already exist?
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94
There is actually no need to check whether it exists or not. Since you already wants to create ...
In C/C++ what's the simplest way to reverse the order of bits in a byte?
...8,
0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
0x12, 0x9...
Plurality in user messages
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94
You can avoid all of this messy plurality by just deleting the items without any message and gi...
CSS @font-face - what does “src: local('☺')” mean?
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94
if you read the notes in font-squirrel's font-face generator, you'll see that it was a gotcha b...
Is there any way to close a StreamWriter without closing its BaseStream?
...ew method fot that!
http://msdn.microsoft.com/EN-US/library/gg712853(v=VS.110,d=hv.2).aspx
public StreamWriter(
Stream stream,
Encoding encoding,
int bufferSize,
bool leaveOpen
)
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Eventual consistency in plain English
... with your ATM card.
Your bank balance, queried from any ATM anywhere, is $110.
At no time can your balance reflect anything other than the actual sum of all of the transactions made on your account to that exact moment.
The reason why so many NoSQL systems have eventual consistency is that virtu...
What is the “right” way to iterate through an array in Ruby?
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Robert GambleRobert Gamble
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