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An algorithm for inflating/deflating (offsetting, buffering) polygons
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Bernhard Barker
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answered Oct 30 '11 at 19:52
Angus JohnsonAngus...
How to print formatted BigDecimal values?
...s money, and I need to print its value in the browser in a format like $123.00 , $15.50 , $0.33 .
6 Answers
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What's the (hidden) cost of Scala's lazy val?
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edited Feb 20 '14 at 20:33
vergenzt
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answered J...
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 ...
How do you see the entire command history in interactive Python?
...n even better answer.
– macetw
Sep 23 at 16:45
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Checking images for similarity with OpenCV
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This is a huge topic, with answers from 3 lines of code to entire research magazines.
I will outline the most common such techniques and their results.
Comparing histograms
One of the simplest & fastest methods. Proposed decades ago as a means to find picture s...
Clang optimization levels
On gcc, the manual explains what -O3 , -Os , etc. translate to in terms of specific optimisation arguments ( -funswitch-loops , -fcompare-elim , etc.)
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Remove leading and trailing spaces?
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239
You can use the strip() to remove trailing and leading spaces.
>>> s = ' abd cde ...
MySQL load NULL values from CSV data
I have a file that can contain from 3 to 4 columns of numerical values which are separated by comma. Empty fields are defined with the exception when they are at the end of the row:
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iOS Image Orientation has Strange Behavior
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HarshITHarshIT
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