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Git pre-push hooks
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answered Nov 16 '10 at 16:48
ordnungswidrigordnungswidrig
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How to git clone a specific tag
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Erik SaunierErik Saunier
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Assign multiple columns using := in data.table, by group
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This now works in v1.8.3 on R-Forge. Thanks for highlighting it!
x <- data.table(a = 1:3, b = 1:6)
f <- function(x) {list("hi", "hello")}
x[ , c("col1", "col2") := f(), by = a][]
# a b col1 col2
# 1: 1 1 hi hello
# 2: 2 2 hi hell...
How does numpy.histogram() work?
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8
You may also be interested in this answer if you want to plot them. Matplotlib can also calculate them directly. See examples here and here....
How to map and remove nil values in Ruby
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8 Answers
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Active
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Best practices for circular shift (rotate) operations in C++
...tate question with some more details about what asm gcc/clang produce for x86.
The most compiler-friendly way to express a rotate in C and C++ that avoids any Undefined Behaviour seems to be John Regehr's implementation. I've adapted it to rotate by the width of the type (using fixed-width types l...
Multi-line commands in GHCi
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187
Most of the time, you can rely on type inference to work out a signature for you. In your examp...
Make page to tell browser not to cache/preserve input values
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answered Apr 23 '10 at 14:38
DisgruntledGoatDisgruntledGoat
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How to undo a git merge with conflicts
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1386
Latest Git:
git merge --abort
This attempts to reset your working copy to whatever state it ...
What's the difference between lists enclosed by square brackets and parentheses in Python?
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278
Square brackets are lists while parentheses are tuples.
A list is mutable, meaning you can chan...