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How to access command line arguments of the caller inside a function?
I'm attempting to write a function in bash that will access the scripts command line arguments, but they are replaced with the positional arguments to the function. Is there any way for the function to access the command line arguments if they aren't passed in explicitly?
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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
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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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How do I tar a directory of files and folders without including the directory itself?
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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...
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
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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(/[\...
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)...
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...
How do I shutdown, restart, or log off Windows via a bat file?
.... Prevents the shutdown process from getting stuck.
-t <seconds> — Sets the time until shutdown. Use -t 0 to shutdown immediately.
-c <message> — Adds a shutdown message. The message will end up in the Event Log.
-y — Forces a "yes" answer to all shutdown queries.
Note: This optio...