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How do shift operators work in Java? [duplicate]
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System.out.println(Integer.toBinaryString(2 << 11));
Shifts binary 2(10) by 11 times to the left. Hence: 1000000000000
System.out.println(Integer.toBinaryString(2 << 22));
Shifts binary 2(10) by 22 times to the left. Hence : 100000000000000000000000
System.o...
C++, variable declaration in 'if' expression
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fwyzardfwyzard
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How do you divide each element in a list by an int?
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answered Nov 23 '11 at 15:38
soulchecksoulcheck
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Determining the size of an Android view at runtime
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11 Answers
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Rotating a two-dimensional array in Python
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answered Dec 7 '11 at 19:43
Andrew ClarkAndrew Clark
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Drop data frame columns by name
...st of names :
DF <- data.frame(
x=1:10,
y=10:1,
z=rep(5,10),
a=11:20
)
drops <- c("x","z")
DF[ , !(names(DF) %in% drops)]
Or, alternatively, you can make a list of those to keep and refer to them by name :
keeps <- c("y", "a")
DF[keeps]
EDIT :
For those still not acquainted wi...
How to find if an array contains a specific string in JavaScript/jQuery? [duplicate]
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edited Nov 26 '18 at 11:35
Black
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answer...
round() doesn't seem to be rounding properly
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answered Sep 11 '08 at 15:11
JimmyJimmy
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PostgreSQL: Difference between text and varchar (character varying)
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answered Jan 31 '11 at 8:55
Frank HeikensFrank Heikens
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Extension methods must be defined in a non-generic static class
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answered May 23 '11 at 11:03
cryptedcrypted
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