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How to create a UIView bounce animation?
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144
With iOS7 and UIKit Dynamics, there is no longer any need to use CAKeyframeAnimations or UIVie...
Logic to test that 3 of 4 are True
....7/4) indicates that converting bool to int gives the expected values 0 or 1.
In Java and C#, you can use the following construct:
if ((a?1:0) + (b?1:0) + (c?1:0) + (d?1:0) == 3)
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dplyr summarise: Equivalent of “.drop=FALSE” to keep groups with zero length in output
...e .drop argument that does just what you asked for:
df = data.frame(a=rep(1:3,4), b=rep(1:2,6))
df$b = factor(df$b, levels=1:3)
df %>%
group_by(b, .drop=FALSE) %>%
summarise(count_a=length(a))
#> # A tibble: 3 x 2
#> b count_a
#> <fct> <int>
#> 1 1 ...
Is there any boolean type in Oracle databases?
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11 Answers
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How to format strings in Java
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140
In addition to String.format, also take a look java.text.MessageFormat. The format less terse...
Is it safe to check floating point values for equality to 0?
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115
It is safe to expect that the comparison will return true if and only if the double variable h...
How can I get the client's IP address in ASP.NET MVC?
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edited Jun 14 '14 at 5:52
answered Sep 8 '11 at 13:23
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How to smooth a curve in the right way?
...ort numpy as np
import matplotlib.pyplot as plt
x = np.linspace(0,2*np.pi,100)
y = np.sin(x) + np.random.random(100) * 0.2
yhat = savitzky_golay(y, 51, 3) # window size 51, polynomial order 3
plt.plot(x,y)
plt.plot(x,yhat, color='red')
plt.show()
UPDATE: It has come to my attention that the co...
SSH library for Java [closed]
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121
The Java Secure Channel (JSCH) is a very popular library, used by maven, ant and eclipse. It i...