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iPhone App Icons - Exact Radius?
...done it right. The same works for your launch images. Use launch.png at 320x480 and launch@2x.png at 640x960.
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Fragment over another fragment issue
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20
Why does Android subject us to harsh coding conditions?!
– Lo-Tan
May 20 '15 at 6:06
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Formula to determine brightness of RGB color
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20 Answers
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Unicode equivalents for \w and \b in Java regular expressions?
...er PCRE-based regex engine:
Regex 001A 0085 00A0 2029
J P J P J P J P
\s 1 1 0 1 0 1 0 1
\pZ 0 0 0 0 1 1 1 1
\p{Zs} 0 0 0 0 1 1 0 0
\p{Spac...
How to calculate cumulative normal distribution?
...m.cdf(1.96)
0.9750021048517795
>>> norm.cdf(-1.96)
0.024997895148220435
In other words, approximately 95% of the standard normal interval lies within two standard deviations, centered on a standard mean of zero.
If you need the inverse CDF:
>>> norm.ppf(norm.cdf(1.96))
array(1....
Cluster analysis in R: determine the optimal number of clusters
...(d, pamk.best$nc))
# we could also do:
library(fpc)
asw <- numeric(20)
for (k in 2:20)
asw[[k]] <- pam(d, k) $ silinfo $ avg.width
k.best <- which.max(asw)
cat("silhouette-optimal number of clusters:", k.best, "\n")
# still 4
Three. Calinsky criterion: Another approach to diagnosin...
Test if number is odd or even
...ntegerPHP value, see as well Arithmetic OperatorsPHP.
Example:
$number = 20;
if ($number % 2 == 0) {
print "It's even";
}
Output:
It's even
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Days between two dates? [duplicate]
...ber of days:
>>> from datetime import date
>>> a = date(2011,11,24)
>>> b = date(2011,11,17)
>>> a-b
datetime.timedelta(7)
>>> (a-b).days
7
And it works with datetimes too — I think it rounds down to the nearest day:
>>> from datetime impor...
Default text which won't be shown in drop-down list
...ption.selected = false;
– Oriol
Jan 20 '14 at 1:34
2
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How do I use NSTimer?
...uted every two seconds?
– lab12
Sep 20 '09 at 2:04
You'd pass YES for repeats: when you call scheduledTimerWithTimeInt...