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How to define a two-dimensional array?
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1039
You're technically trying to index an uninitialized array. You have to first initialize the ou...
Creating a Radial Menu in CSS
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+50
Almost 3 years later, I finally made the time to revisit this and post an improved version. You can still view the original answer at ...
What is the difference between float and double?
...re calculated:
double has 52 mantissa bits + 1 hidden bit: log(253)÷log(10) = 15.95 digits
float has 23 mantissa bits + 1 hidden bit: log(224)÷log(10) = 7.22 digits
This precision loss could lead to greater truncation errors being accumulated when repeated calculations are done, e.g.
float a = 1...
Searching for UUIDs in text with regex
...e five equivalent string representations for a GUID:
"ca761232ed4211cebacd00aa0057b223"
"CA761232-ED42-11CE-BACD-00AA0057B223"
"{CA761232-ED42-11CE-BACD-00AA0057B223}"
"(CA761232-ED42-11CE-BACD-00AA0057B223)"
"{0xCA761232, 0xED42, 0x11CE, {0xBA, 0xCD, 0x00, 0xAA, 0x00, 0x57, 0xB2, 0x23}}"
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How to create a inset box-shadow only on one side?
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240
This is what you are looking for. It has examples for each side you want with a shadow.
.top-box...
Understanding the Use of ColorMatrix and ColorMatrixColorFilter to Modify a Drawable's Hue
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10 Answers
10
Active
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Draw a perfect circle from user's touch
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+500
Sometimes it is really useful to spend some time reinventing the wheel. As you might have already noticed there are a lot of framewor...
How to make link look like a button?
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107
Using CSS:
.button {
display: block;
width: 115px;
height: 25px;
backg...
Normalize data in pandas
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In [92]: df
Out[92]:
a b c d
A -0.488816 0.863769 4.325608 -4.721202
B -11.937097 2.993993 -12.916784 -1.086236
C -5.569493 4.672679 -2.168464 -9.315900
D 8.892368 0.932785 4.535396 0.598124
In [93]: df_norm = (df - df.mean()) / (df.max() - df...
How to add an extra column to a NumPy array
...lution and faster to boot is to do the following:
import numpy as np
N = 10
a = np.random.rand(N,N)
b = np.zeros((N,N+1))
b[:,:-1] = a
And timings:
In [23]: N = 10
In [24]: a = np.random.rand(N,N)
In [25]: %timeit b = np.hstack((a,np.zeros((a.shape[0],1))))
10000 loops, best of 3: 19.6 us per ...