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How do I tar a directory of files and folders without including the directory itself?
...
cd my_directory/ && tar -zcvf ../my_dir.tgz . && cd -
should do the job in one line. It works well for hidden files as well. "*" doesn't expand hidden files by path name expansion at least in bash. Below is my experiment:
$ mkdir my_director...
Print a string as hex bytes?
...ing: Hello world !! and I want to print it using Python as 48:65:6c:6c:6f:20:77:6f:72:6c:64:20:21:21 .
13 Answers
...
Factors in R: more than an annoyance?
... = Petal.Length ~ -1 + Species, data = iris)
# Coefficients:
# Speciessetosa Speciesversicolor Speciesvirginica
# 1.462 4.260 5.552
iris.alt <- iris
iris.alt$Species <- as.character(iris.alt$Species)
lm(Petal.Length ~ -1 + Species, data=iris.a...
Time complexity of Euclid's Algorithm
I am having difficulty deciding what the time complexity of Euclid's greatest common denominator algorithm is. This algorithm in pseudo-code is:
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Remove not alphanumeric characters from string
...e character n.
To replace a control character you need to use a character set like [\r], as \r has a special meaning in a regular expression:
var input = "\\test\red\bob\fred\new";
var output = input
.replace(/[\r]/g, 'r')
.replace(/[\b]/g, 'b')
.replace(/[\f]/g, 'f')
.replace(/[\...
Python int to binary string?
..., receiving intVal:
if intVal is equal to zero:
return "0"
set strVal to ""
while intVal is greater than zero:
if intVal is odd:
prefix "1" to strVal
else:
prefix "0" to strVal
divide intVal by two, rounding down
return strVal
...
Avoiding if statement inside a for loop?
...1, you can do something like this:
#include <iostream>
#include <set>
#include <vector>
template <typename Container, typename Functor, typename Index = std::size_t>
void for_each_indexed(const Container& c, Functor f, Index index = 0) {
for (const auto& e : c)...
Recursively counting files in a Linux directory
How can I recursively count files in a Linux directory?
21 Answers
21
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How to print struct variables in console?
...ore thing. My JSON files are related to an API... therefor I dont want to set the Id or Name, I just want to get it over the API and print it in console. How can I do that?
– fnr
Jul 1 '14 at 14:13
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filter for complete cases in data.frame using dplyr (case-wise deletion)
...in before passing it to the filter.
Another benchmark with more columns:
set.seed(123)
x <- sample(1e5,1e5*26, replace = TRUE)
x[sample(seq_along(x), 1e3)] <- NA
df <- as.data.frame(matrix(x, ncol = 26))
library(microbenchmark)
microbenchmark(
na.omit = {df %>% na.omit},
filter.ano...