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Python exit commands - why so many and when should each be used?
...xecution. The choices I've found are: quit() , exit() , sys.exit() , os._exit()
4 Answers
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How to get a variable value if variable name is stored as string?
...ariable_value="\$$variable_name"
fi
echo "$variable_value"
}
test=123
get_value_of test
# 123
test="\$(echo \"something nasty\")"
get_value_of test
# $(echo "something nasty")
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impr...
Redirecting stdout to “nothing” in python
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Cross-platform:
import os
import sys
f = open(os.devnull, 'w')
sys.stdout = f
On Windows:
f = open('nul', 'w')
sys.stdout = f
On Linux:
f = open('/dev/null', 'w')
sys.stdout = f
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How to properly create an SVN tag from trunk?
...revision of the trunk and "tag" it as well. the command: svn copy -r 123 "svn.example.com/project/trunk" "svn.example.com/project/tags/1.0" -m "Tagging, but using older revision (123)."
– granadaCoder
Oct 18 '11 at 16:39
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Installed Java 7 on Mac OS X but Terminal is still using version 6
...in this way :
To easily and quickly open the Java Preferences pane in Mac OS X you can simply call spotlight with ⌘+SPACE and type System Preferences it will show up in the last row of the window.
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Focus-follows-mouse (plus auto-raise) on Mac OS X
...gram called CodeTek Virtual Desktop that'll emulate it systemwide, but it costs $$ (and they never got a version out for OSX Leopard).
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How to force R to use a specified factor level as reference in a regression?
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See the relevel() function. Here is an example:
set.seed(123)
x <- rnorm(100)
DF <- data.frame(x = x,
y = 4 + (1.5*x) + rnorm(100, sd = 2),
b = gl(5, 20))
head(DF)
str(DF)
m1 <- lm(y ~ x + b, data = DF)
summary(m1)
Now alter the factor ...
How to install Xcode Command Line Tools
...do I get the command-line build tools installed with the current Xcode/Mac OS X v10.8 (Mountain Lion) or later?
13 Answers
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Environment variables in Mac OS X
...grams launched by all users on the machine (assuming they use bash).
~/.MacOSX/environment.plist: this is read by loginwindow on login. It applies to all applications, including GUI ones, except those launched by Spotlight in 10.5 (not 10.6). It requires you to logout and login again for changes to ...
Merge PDF files
Is it possible, using Python, to merge separate PDF files?
9 Answers
9
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