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How to detect if my shell script is running through a pipe?
...eas
(if [ -t 1 ] ; then echo terminal; else echo "not a terminal"; fi) | m>cat m>
returns "not a terminal", because the output of the parenthetic is piped to m>cat m>.
The -t flag is described in man pages as
-t fd True if file descriptor fd is open and refers to a terminal.
... where fd can be ...
How to insert a text at the beginning of a file?
...ile
Or you can use Command Grouping:
$ { echo -n '<added text> '; m>cat m> file; } >file.new
$ mv file{.new,}
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Linux command (like m>cat m>) to read a specified quantity of characters
Is there a command like m>cat m> in linux which can return a specified quantity of characters from a file?
9 Answers
...
dynamic_cast and static_cast in C++
...rwise, you'll get a NULL pointer.
But B2D casts are a little more complim>cat m>ed. Consider the following code:
#include <iostream>
using namespace std;
class Base
{
public:
virtual void DoIt() = 0; // pure virtual
virtual ~Base() {};
};
class Foo : public Base
{
public:
virt...
Function to clear the console in R and RStudio
...
m>cat m>("\014")
is the code to send CTRL+L to the console, and therefore will clear the screen.
Far better than just sending a whole lot of returns.
...
Remove sensitive files and their commits from Git history
...PATH-TO-YOUR-FILE-WITH-SENSITIVE-DATA" \
--prune-empty --tag-name-filter m>cat m> -- --all
git push --force --verbose --dry-run
git push --force
Keep in mind that once you've pushed this code to a remote repository like GitHub and others have cloned that remote repository, you're now in a situati...
How to get the part of a file after the first line that matches a regular expression?
...vior of sed of printing each line after executing its script on it, -e indim>cat m>ed a script to sed, /TERMINATE/,$ is an address (line) range selection meaning the first line matching the TERMINATE regular expression (like grep) to the end of the file ($), and p is the print command which prints the cu...
How do I view 'git diff' output with my preferred diff tool/ viewer?
...e new-file new-hex new-mode
"<path_to_diff_executable>" "$2" "$5" | m>cat m>
--8<-(snap)--
As you can see, only the second ("old-file") and fifth ("new-file") arguments will be
passed to the diff tool.
2) Type
$ git config --global diff.external <path_to_wrapper_script>
at the comma...
How do I do word Stemming or Lemmatization?
...a to use stopwords to minimize output lemmas if it's used later in classifim>cat m>or. Please take a look at coreNlp extension written by John Conwell.
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How to inherit from a class in javascript?
... used with the new operator:
var subInstance = new Sub();
Function applim>cat m>ion or "constructor chaining":
function Super () {
this.member1 = 'superMember1';
this.member2 = 'superMember2';
}
function Sub() {
Super.apply(this, arguments);
this.member3 = 'subMember3';
}
This approach sh...