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Java Enum Methods - return opposite direction enum
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answered Sep 18 '13 at 23:01
PshemoPshemo
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How to succinctly write a formula with many variables from a data frame?
... the . identifier.
y <- c(1,4,6)
d <- data.frame(y = y, x1 = c(4,-1,3), x2 = c(3,9,8), x3 = c(4,-4,-2))
mod <- lm(y ~ ., data = d)
You can also do things like this, to use all variables but one (in this case x3 is excluded):
mod <- lm(y ~ . - x3, data = d)
Technically, . means all ...
When should iteritems() be used instead of items()?
... of iteritems() in all places? Why was iteritems() removed from Python 3? Seems like a terrific and useful method. What's the reasoning behind it?
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Remove Application Insight from application on Visual Studio 2013
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edited Apr 23 '14 at 20:46
answered Apr 23 '14 at 20:41
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npm windows install globally results in npm ERR! extraneous
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answered Mar 25 '14 at 4:30
Kyle Robinson YoungKyle Robinson Young
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What is a segmentation fault?
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edited Feb 27 '10 at 10:23
aib
39.4k1010 gold badges6767 silver badges7575 bronze badges
answered Feb 2...
How to achieve code folding effects in Emacs?
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edited Jun 28 '13 at 19:26
Bleeding Fingers
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How to ignore xargs commands if stdin input is empty?
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322
For GNU xargs, you can use the -r or --no-run-if-empty option:
--no-run-if-empty
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Reading string from input with space character? [duplicate]
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edited Mar 17 '13 at 2:42
zuzak
555 bronze badges
answered Jun 8 '11 at 16:40
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Alphabet range in Python
...y', 'z']
And to do it with range
>>> list(map(chr, range(97, 123))) #or list(map(chr, range(ord('a'), ord('z')+1)))
['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z']
Other helpful string module features:
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