103
\$\begingroup\$

Following the best security practices, I keep a plain text file with my passwords on my hard drive. In fact, I just copied and pasted one of them to access my PPCG account.

In a lucid moment, I decide that the password should better not remain in the clipboard after its use. Since this happens to me often, I could use a program to remove the clipboard contents.

Challenge

Write a program or function that deletes or overwrites any text contained in the clipboard, using a programming language of your choice.

Additional details:

  • If your system has several clipboards, you can write the program for any one of them. The only requirement is that it must be possible for the user to copy and paste text using that clipboard.

  • If your clipboard keeps a history of recent copied entries, assume the most recent entry.

  • If your answer is specific to an operating system or clipboard, indicate it in the title of your post, together with the used language.

  • The clipboard is guaranteed to contain text when your program is run. You can either delete the contents from the clipboard, or overwrite it with something else (not necessarily text). The only requirement is that after running the program, pasting from the clipboard will not produce the original text.

  • If you choose to overwrite with some fixed or randomly chosen text, you can assume that the previous clipboard contents are different from that text, so the password is effectively removed. In other words, disregard the possibility that the filler text coincides with the password.

  • The program should not have any side-effects like restarting the system, closing programs, shutting down the computer, or freezing it. After your program is run, the user should be able to keep using the computer as normal, only with the password removed from the clipboard. Also, standard loopholes are forbidden.

Shortest code in bytes wins.

\$\endgroup\$
10
  • 21
    \$\begingroup\$ On a more serious note: Use something like keepass to do that for you. \$\endgroup\$
    – flawr
    Feb 26, 2017 at 21:14
  • 18
    \$\begingroup\$ "Disregard the possibility that the filler text coincides with the password." Solution: ` `, 0 bytes. Overwrites the password with itself. \$\endgroup\$ Feb 27, 2017 at 3:10
  • 3
    \$\begingroup\$ @Challenger5 but that's only If you choose to overwrite with some fixed or randomly chosen text \$\endgroup\$
    – Luis Mendo
    Feb 27, 2017 at 10:08
  • 11
    \$\begingroup\$ The very worst part about this question is that I can completely relate to the intro story despite knowing that it's satirical. ...so, keepass, huh? Should look into that... \$\endgroup\$
    – Nat
    Feb 27, 2017 at 11:01
  • 1
    \$\begingroup\$ @Challenger5 That wouldn't be a full Java program or function ;) \$\endgroup\$
    – user41805
    Feb 28, 2017 at 10:22

54 Answers 54

132
\$\begingroup\$

PowerShell, 3 bytes

scb

That's a default alias for Set-Clipboard. When called with nothing piped in and no arguments supplied, it blows away the current clipboard contents.

\$\endgroup\$
2
  • 25
    \$\begingroup\$ The shortest answer which actually clears the clipboard instead of setting it to a newline or something not-quite-blank. \$\endgroup\$
    – Luna
    Feb 27, 2017 at 18:57
  • 1
    \$\begingroup\$ This is very nice. \$\endgroup\$
    – beppe9000
    Mar 3, 2017 at 20:28
77
\$\begingroup\$

Vim, 3 bytes

"*Y

Sets the clipboard content to a newline.

By default, vim opens an empty buffer on start up. Now the program Yanks (copy) the entire line (including a newline) and store it in your clipboard by yanking it the text into register "*. The * can be changed to a + for the other clipboard.

\$\endgroup\$
4
  • 6
    \$\begingroup\$ Aaargh, I was just going to post this answer! +1, right tool for the job. :) \$\endgroup\$
    – DJMcMayhem
    Feb 26, 2017 at 19:14
  • \$\begingroup\$ If there are more installations of vim than of powershell, this should be the accepted answer on the basis of "Universality" ;) \$\endgroup\$
    – JPCF
    Mar 1, 2017 at 13:26
  • 1
    \$\begingroup\$ @JPCF and there are many more 'actual' applications written in C# than there are coffeescript etc. It doesn't make one better than the other when it comes to code-golf \$\endgroup\$
    – Baldrickk
    Mar 1, 2017 at 15:14
  • 1
    \$\begingroup\$ I doubt there are more installations of vim than PowerShell, since it's installed by default in Windows 8 and up. \$\endgroup\$ Mar 15, 2017 at 1:43
60
\$\begingroup\$

Javascript (Chrome DevTools Console), 6 bytes

copy``

Note that this is a feature of the console (which also works in the FF console) and is not part of the language standard.

\$\endgroup\$
6
  • 3
    \$\begingroup\$ Huh, I didn't know JS had this function. Works in Firefox too. (The contents of the clipboard become [\n ""\n]) \$\endgroup\$ Feb 26, 2017 at 19:17
  • 1
    \$\begingroup\$ Can confirm this as well on Chrome. The clipboard changes to: [\n ""\n ] \$\endgroup\$ Feb 26, 2017 at 20:10
  • 33
    \$\begingroup\$ @ETHproductions Actually, this function doesn't really exist in JS. This is a console built-in. (Which doesn't invalidate the answer. But maybe it should be explained more explicitly.) \$\endgroup\$
    – Arnauld
    Feb 26, 2017 at 21:50
  • \$\begingroup\$ Well doesn't it exist through Document.execCommand("copy") or is that an internal-to-browser clipboard? I use that in some tamper monkey scripts, but too lazy to check it \$\endgroup\$ Mar 1, 2017 at 9:32
  • 1
    \$\begingroup\$ Okay... this is now my new most upvoted answer \$\endgroup\$ Mar 2, 2017 at 2:45
59
\$\begingroup\$

AppleScript, 20 bytes

set the clipboard to

Sets the clipboard to... nothing.


I saved a lot of bytes by removing the code to send me the contents of the clipboard ;)

\$\endgroup\$
33
\$\begingroup\$

Batch (Windows 7 and higher version), 7 bytes

fc|clip

Note: it will response error message like "FC:..." but it works.

"clip" is a command to copy the output of another program to clipboard (available since windows 7)

"fc" is a command to compare two or more files. in this case we not input any file. it will error, then "clip" will set clipboard to an empty string.

provided that you have a file "a" in your current directory (it can be empty), you can do one better:

clip<a

Edit: See @Matthew Steeples comment for the shorter version (but in powershell not a batch)

\$\endgroup\$
11
  • 2
    \$\begingroup\$ You could use sc instead of fc to avoid the error message. Then, the sc help text would be set on the clipboard. Also, +1 for telling me about clip. \$\endgroup\$
    – Neil
    Feb 26, 2017 at 21:54
  • 2
    \$\begingroup\$ My one used cd. :-) \$\endgroup\$ Feb 26, 2017 at 21:55
  • \$\begingroup\$ I guessing clip won't pick up the output of a non-command? So you couldn't just run x|clip? \$\endgroup\$ Feb 26, 2017 at 22:27
  • \$\begingroup\$ @djsmiley2k Yes, it will pick up only the output from a valid command. \$\endgroup\$
    – Divcy
    Feb 26, 2017 at 22:42
  • 4
    \$\begingroup\$ You can knock another character off this. h is an alias (by default) for get-history, so you can do h|clip \$\endgroup\$ Feb 26, 2017 at 23:33
32
\$\begingroup\$

Bash on macOS, 8 bytes

:|pbcopy

: could be replaced with almost any other single character.

\$\endgroup\$
2
  • 6
    \$\begingroup\$ :|pbcopy works in bash as well as zsh. \$\endgroup\$ Feb 27, 2017 at 19:08
  • 2
    \$\begingroup\$ Anyone else think :|p looks like a tongue-sticking-out emoticon with a mustache? \$\endgroup\$ May 23, 2020 at 23:01
29
\$\begingroup\$

C (on Windows), 65 62 42 41 bytes

main(){EmptyClipboard(OpenClipboard(0));}

Note that the Visual C++ command-line needs /link user32.lib but the IDE or other compilers may automatically include this. Also this won't work in Win16 because the calling convention is incorrect.

Edit: Saved 3 bytes thanks to @Orion. Saved 20 bytes thanks to @KrzysztofSzewczyk. Saved a further byte thanks to @ceilingcat.

\$\endgroup\$
3
  • 25
    \$\begingroup\$ Since it's C, can't you use 0 instead of NULL? \$\endgroup\$
    – Orion
    Feb 27, 2017 at 1:09
  • \$\begingroup\$ You can strip the #include I think \$\endgroup\$ Dec 13, 2019 at 20:44
  • \$\begingroup\$ Can you stick the OpenClipboard(0) inside the parens after EmptyClipboard? \$\endgroup\$
    – ceilingcat
    Dec 14, 2019 at 4:18
25
\$\begingroup\$

AHK, 10 bytes (Windows)

clipboard=

Clears text content of the clipboard. If clipboardAll is used it clears everything.

From the docs -

Clipboard is a built-in variable that reflects the current contents of the Windows clipboard if those contents can be expressed as text. By contrast, ClipboardAll contains everything on the clipboard, such as pictures and formatting.

\$\endgroup\$
24
\$\begingroup\$

Excel, 1 keystroke

Ctrl-C

Works because Excel, uniquely, always has a selection. Probably works in other spreadsheet applications too. As opposed to the other joking entries, Excel answers are actually somewhat frequent on PPCG.

\$\endgroup\$
6
  • 6
    \$\begingroup\$ Isn't this 2 keystrokes? "A keystroke is a single press of a key on a keyboard. Each key press is a keystroke." computerhope.com/jargon/k/keystroke.htm \$\endgroup\$
    – Martijn
    Mar 2, 2017 at 11:18
  • \$\begingroup\$ @Martijn Possibly. I just copied from here. \$\endgroup\$
    – Adám
    Mar 2, 2017 at 11:20
  • \$\begingroup\$ I'm not sure it's really valid to score by keystrokes. Also, since you say As opposed to the other joking entries, I interpret that as you admitting this is not an actually valid answer. So I won't accept it even if it's the shortest one. If you can point me to some relevant meta-post establishing the validity of keystrokes as scoring method, I will happily accept this submission \$\endgroup\$
    – Luis Mendo
    Apr 21, 2017 at 22:54
  • 1
    \$\begingroup\$ @Adám My understanding it that that meta-post refers to a hypothetical "editor golf" challenge category, not to using the number of keystrokes as a scoring method for "code golf" challenges. I've pinged Doorknob and Dennis to know their opinion \$\endgroup\$
    – Luis Mendo
    Apr 23, 2017 at 15:34
  • 1
    \$\begingroup\$ I'm still not totally convinced that keystrokes are a valid scoring method and are comparable to bytes. But I haven't had any conclusive feedback to settle this, so I'm assuming it is valid and therefore accepting this answer \$\endgroup\$
    – Luis Mendo
    Apr 25, 2017 at 21:44
22
\$\begingroup\$

Java 8, 127 125 bytes

Golfed:

()->java.awt.Toolkit.getDefaultToolkit().getSystemClipboard().setContents(new java.awt.datatransfer.StringSelection(""),null)

Ungolfed:

public class ICopiedMyPasswordToTheClipboardCanYouDeleteIt {

  public static void main(String[] args) {
    f(() -> java.awt.Toolkit.getDefaultToolkit().getSystemClipboard().setContents(
      new java.awt.datatransfer.StringSelection(""), null));
  }

  private static void f(Runnable x) {
    x.run();
  }
}
\$\endgroup\$
2
  • 2
    \$\begingroup\$ Could you use an empty string instead of null? Saves 2 bytes \$\endgroup\$
    – Poke
    Feb 27, 2017 at 0:58
  • 1
    \$\begingroup\$ @Poke yes, that works. I was focusing on "deleting" the contents of the clipboard, as in truly clearing them out. Turns out overwriting is fine too. \$\endgroup\$
    – user18932
    Feb 27, 2017 at 1:34
19
\$\begingroup\$

Excel VBA, 9 8 bytes

[A1].Cut

Overwrites the clipboard with contents of A1 cell in active worksheet (empty by default but may be any string/expression of your choice - just make sure it's not your password!).

Utilises the Immediate Window.

One byte saved thanks to Slai

\$\endgroup\$
1
  • 1
    \$\begingroup\$ Nice! You can save a byte with [a1].Cut \$\endgroup\$
    – Slai
    Mar 6, 2017 at 18:18
18
\$\begingroup\$

SmileBASIC 3, 10 bytes

Finally, a challenge practically made for SmileBASIC 3!

CLIPBOARD"

CLIPBOARD is a builtin that sets the environment's text clipboard to the given string. Here we give it an empty string (closing " isn't needed!)

\$\endgroup\$
1
  • 2
    \$\begingroup\$ Thanks for the explanation, since that looks like two '! \$\endgroup\$
    – msanford
    Mar 2, 2017 at 23:03
17
\$\begingroup\$

Google Chrome Language, 2 keystrokes

Ctrl-S Ctrl-C

Based on this Notepad++ answer.

Google Chrome supports Javascript (which in turn supports RegExp), so I hereby claim it to be a superset of Javascript and a language of its own.

How it works:

Ctrl+S will invoke the "Save Page" dialog with the "New Tab" text pre-selected, Ctrl+C will copy it into the clipboard, displacing the previous content.

Sidenote:

You can access the Javascript functionality in Chrome, via javascript: URLs and the Developer Tools console (invoked with Ctrl+Shift+J)

\$\endgroup\$
5
  • 2
    \$\begingroup\$ Gah, I wanted to use Google Chrome, but I didn't realize that I could argue it as a superset of JS... well played. \$\endgroup\$
    – Pavel
    Feb 28, 2017 at 22:05
  • 9
    \$\begingroup\$ Then I guess pressing the Print Screen button (1 keystroke) is a solution in Windows Language, which is a superset of Google Chrome Lang. \$\endgroup\$ Mar 1, 2017 at 16:25
  • \$\begingroup\$ @MemetOlsen Yep, exactly, feel free to post it. We already have "Notepad++ Language" and "Google Chrome Language", so "Windows Language" seem like the next logical step to take ! :) \$\endgroup\$
    – zeppelin
    Mar 1, 2017 at 16:51
  • 1
    \$\begingroup\$ @MemetOlsen it isn't quite a superset of Google Chrome Lang, since Chrome is an external "library" you have to download. It is a superset of IE lang, which is a superset of JS. \$\endgroup\$
    – Pavel
    Mar 1, 2017 at 19:59
  • \$\begingroup\$ Thanks guys, I added my suggestion as my first answer on this SE site. \$\endgroup\$ Mar 2, 2017 at 9:05
16
\$\begingroup\$

Python 56 48 40 bytes (Only works on Linux).

8 bytes saved thanks to @wheatwizard.

import os as o
o.system("echo|xclip")
\$\endgroup\$
14
  • 35
    \$\begingroup\$ It's 6 bytes shorter without the as o part... (import os \n os.system("echo |xclip") \$\endgroup\$
    – Riker
    Feb 27, 2017 at 0:02
  • 4
    \$\begingroup\$ You can also replace echo with : for ":|xclip" \$\endgroup\$
    – Riker
    Feb 27, 2017 at 0:04
  • 22
    \$\begingroup\$ Or just one line at 37 bytes: __import__('os').system("echo|xclip") \$\endgroup\$
    – Daniel
    Feb 27, 2017 at 0:23
  • 4
    \$\begingroup\$ There's also an alternative to xclip called xsel on Linux systems, which would save you another byte - and as already mentioned, remove the "as o" import part again, it just makes things longer: import os;os.system(":|xsel") (29 bytes). \$\endgroup\$ Mar 1, 2017 at 16:01
  • 3
    \$\begingroup\$ Don't edit other people's code. If you have any suggestions leave them in the comments. \$\endgroup\$ Mar 3, 2017 at 23:20
11
\$\begingroup\$

Mathematica, 17 bytes

CopyToClipboard@0

Sets clipboard to the number 0.

\$\endgroup\$
11
\$\begingroup\$

bash + xsel 8 7bytes

xsel -c

Explanation

-b: Works on clipboard selection

-c: clears the selection

\$\endgroup\$
5
  • 1
    \$\begingroup\$ +1, but this is not coreutils \$\endgroup\$
    – pacholik
    Feb 27, 2017 at 9:31
  • \$\begingroup\$ @pacholik Yea you need to install the package, since I operated it on the terminal, I mentioned it as coreutils. \$\endgroup\$
    – Abel Tom
    Feb 27, 2017 at 9:49
  • 1
    \$\begingroup\$ On Debian, xsel is in the xsel package, not part of coreutils. \$\endgroup\$ Feb 27, 2017 at 15:42
  • \$\begingroup\$ Since we're allowed to use any clipboard we want to, I think you can drop the b. \$\endgroup\$
    – Dennis
    Feb 27, 2017 at 18:15
  • \$\begingroup\$ @Digital Trauma Fair enough \$\endgroup\$
    – Abel Tom
    Feb 27, 2017 at 19:53
10
\$\begingroup\$

R (Windows) 18

writeClipboard("")
\$\endgroup\$
2
  • \$\begingroup\$ Do you know of a Linux equivalent? \$\endgroup\$
    – user66045
    Feb 27, 2017 at 5:11
  • \$\begingroup\$ I think something like readLines(file("clipboard", "r")) might work. Try looking in the R help docs under "Functions to Manipulate Connections". \$\endgroup\$
    – Flounderer
    Feb 27, 2017 at 9:36
8
\$\begingroup\$

Matlab, 19 13 bytes

gcf;print -dm

Set clipboard contents to an empty figure.

\$\endgroup\$
6
  • \$\begingroup\$ It's 21 UTF-8 bytes \$\endgroup\$
    – CAD97
    Feb 26, 2017 at 19:17
  • \$\begingroup\$ @LuisMendo This is longer (23): axes;print -dmeta;close but also works... \$\endgroup\$
    – EBH
    Feb 26, 2017 at 20:04
  • \$\begingroup\$ @EBH That close can arguably be removed. By "side effects" I was thinking of things disappearing, not appearing. Also, print(gcf,'-dm') works \$\endgroup\$
    – Luis Mendo
    Feb 26, 2017 at 20:13
  • \$\begingroup\$ @LuisMendo Well, I didn't know that -dm is like -dmeta, and thought the program should work 'silently', without popping any window :) \$\endgroup\$
    – EBH
    Feb 26, 2017 at 20:17
  • 2
    \$\begingroup\$ @LuisMendo indeed, it is my first. Now the suggestion is even shorter. \$\endgroup\$
    – EBH
    Feb 26, 2017 at 20:53
8
\$\begingroup\$

Bash, 11 10 8 7 bytes

2 bytes saved thanks to @seshoumara for using ls instead of echo

Thanks to hexafraction, isaacg and Riker for suggesting several 7-byters

w|xclip

The clipboard is set to the result of w. This only works on X11 based systems. For example, on macOS, this clipboard can be accessed by using an X based application like XQuartz.


Old answer only for macOS (11 9 bytes):

ls|pbcopy

This sets the clipboard content to a newline.

\$\endgroup\$
8
  • \$\begingroup\$ How about ls|xclip? \$\endgroup\$
    – seshoumara
    Feb 26, 2017 at 19:20
  • \$\begingroup\$ @seshoumara Thanks! (and to think that I ls /usr/bin | grep "^.\{1,3\}$"'d to search for a shorter command :P) \$\endgroup\$
    – user41805
    Feb 26, 2017 at 19:26
  • 3
    \$\begingroup\$ Or w|xclip for one less. Dumps list of logged-in users to the clipboard. \$\endgroup\$
    – nanofarad
    Feb 26, 2017 at 21:56
  • 5
    \$\begingroup\$ Or :|xclip. Actually clears the clipboard. \$\endgroup\$
    – isaacg
    Feb 27, 2017 at 5:39
  • 1
    \$\begingroup\$ Huh, works on my machine. And since submissions may expect empty input, so would a bare xclip without any pipes. \$\endgroup\$
    – Dennis
    Feb 27, 2017 at 19:39
8
\$\begingroup\$

Applescript, 23 bytes

set the clipboard to ""
\$\endgroup\$
2
  • \$\begingroup\$ Ohhh Thanks @DigitalTrauma \$\endgroup\$
    – arodebaugh
    Feb 27, 2017 at 19:48
  • \$\begingroup\$ You could remove the quotation marks entirely, but It had been done already \$\endgroup\$
    – sagiksp
    Feb 28, 2017 at 10:01
8
\$\begingroup\$

Notepad++, 3 Keystrokes

a Ctrl-A Ctrl-C

Inserts the letter a, selects it, copies it to the keyboard.

Notepad++ is a valid language, it supports regex and is therefore a superset of regex, and we consider regex to be a valid language.

\$\endgroup\$
10
  • \$\begingroup\$ consider regex to be a valid language References ? Apparently RegExp is not Turing complete by itself. \$\endgroup\$
    – zeppelin
    Feb 28, 2017 at 19:23
  • 3
    \$\begingroup\$ @zeppelin It doesn't have to be Turing Complete to be a valid language. \$\endgroup\$
    – Pavel
    Feb 28, 2017 at 19:41
  • \$\begingroup\$ It doesn't have to be Turing Complete to be a valid language By that measure, we can claim almost anything to be a "language". I.e. XML or HTML do have a syntax too (and even call themselves languages, unlike RegExp), nevertheless I don't think they are acceptable. Can you provide an example of a pure-Regexp answer, which has been upvoted by the community ? Moreover I believe Notepad++, does not really "support regexp" in sense that it can invoke it programmatically, and opening the UI "Search and Replace" box to type a RegExp there, is not a "program code" by any measure. \$\endgroup\$
    – zeppelin
    Feb 28, 2017 at 19:53
  • 2
    \$\begingroup\$ @zeppelin meta.codegolf.stackexchange.com/a/4817/60042 <-- relevant meta post. Keep in mind you can access search-and-replace in N++ with <c-H>, and use <tab> to navigate through the UI and interact with all the relevant fields. Also note that regex can determine primality of and add numbers. (Both in unary, which is the default numeric representation for regex) \$\endgroup\$
    – Pavel
    Feb 28, 2017 at 20:02
  • \$\begingroup\$ the meta-post in question refers to the Vim and Emacs class editors, which are extremely programmable, not Notepad. And yes, I've seen people use RegExp for primality testing on this site, but that's just a funny corner-case and not a real proof of RegExp being a language. So please provide a reference to any upvoted "pure-Regexp" answer, to prove your point. \$\endgroup\$
    – zeppelin
    Feb 28, 2017 at 20:25
7
\$\begingroup\$

Python + tkinter, 43 bytes

Python 3:

from tkinter import*;Tk().clipboard_clear()

Python 2:

from Tkinter import*;Tk().clipboard_clear()
\$\endgroup\$
7
  • \$\begingroup\$ is tkinter included in the python distro? \$\endgroup\$
    – Cruncher
    Feb 27, 2017 at 16:59
  • \$\begingroup\$ @Cruncher It is in my Python 3. \$\endgroup\$
    – DLosc
    Feb 27, 2017 at 18:19
  • \$\begingroup\$ @Cruncher Yes, it's part of the stdlib, even though I believe debian packages it in a separate package (python-tk) from the "core python". \$\endgroup\$
    – Bakuriu
    Mar 1, 2017 at 20:13
  • \$\begingroup\$ Take a look at Dopapp's comment for an even shorter way. \$\endgroup\$
    – jpaugh
    Mar 1, 2017 at 22:07
  • \$\begingroup\$ @jpaugh If you are referring to changing the import style to __import__("tkinter")...., this is 1 byte longer in this case. \$\endgroup\$
    – Trelzevir
    Mar 2, 2017 at 18:28
7
\$\begingroup\$

Python 33 bytes (Only works on Windows).

4 bytes saved from @hubacub version.

3 bytes switching to windows, using @Divcy solution

import os
os.system("fc|clip")

Just registered in stackexchange, so I don't have the reputation to just comment on @hubacub submition. There is no need to expend 5 bytes with " as o" in the import to save 1 byte to reduce "os.system" to "o.system".

\$\endgroup\$
1
  • \$\begingroup\$ Welcome to the site! \$\endgroup\$
    – Luis Mendo
    Feb 28, 2017 at 15:07
7
\$\begingroup\$

C#, 30 bytes

Thanks to Nat, JMD and BgrWorker for their suggestions!

System.Windows.Clipboard.Clear

C# without WPF, 36 bytes

System.Windows.Forms.Clipboard.Clear

Built-in function which empties the clipboard.

Full program with test case:

using System;
using System.Windows.Forms;

class ClearClipboard
{
    static void Main()
    {
        Action f =
        ()=>System.Windows.Forms.Clipboard.Clear();

        // test case:
        Clipboard.SetText("SomePassword!");
        Console.WriteLine("In clipboard initially: " + Clipboard.GetText());
        f();
        Console.WriteLine("In clipboard now: " + Clipboard.GetText());
    }
}
\$\endgroup\$
6
  • 1
    \$\begingroup\$ System.Windows.Clipboard \$\endgroup\$
    – Nat
    Feb 27, 2017 at 11:23
  • 4
    \$\begingroup\$ Also, Clipboard.Clear() is already a function, so the lambda can be dropped. \$\endgroup\$
    – Nat
    Feb 27, 2017 at 11:30
  • 1
    \$\begingroup\$ I won't bother adding an answer for LINQPad since this answer would just run in it. System.Windows.Clipboard.Clear(); But, lprun might be a more lightweight way to run this answer than VS or even VS Code. \$\endgroup\$
    – JMD
    Feb 27, 2017 at 23:52
  • \$\begingroup\$ @Nat When omitting .Forms, it didn't compile on Linux and I don't have a Windows machine at the moment. \$\endgroup\$
    – adrianmp
    Feb 28, 2017 at 7:48
  • 2
    \$\begingroup\$ @adrianmp that class is only contained in PresentationCore.dll, a reference added by default on WPF type projects. I have no idea if that dll is included in Mono/.NET Core \$\endgroup\$
    – BgrWorker
    Feb 28, 2017 at 16:54
6
\$\begingroup\$

Haskell, 34 bytes

import System.Hclip
setClipboard""

Just a boring library function. There's also clearClipboard for the same byte count.

\$\endgroup\$
6
\$\begingroup\$

J (Windows), 12 bytes

wd'clipcopy'

wd is J's standard library for Windows. wd 'clipcopy password' would put the text password into the clipboard. Specifying nothing wipes the clipboard.

If you want a program to put your plaintext password into your clipboard, you could use the following:

pass =. 'abc123'
wd 'clipcopy ' , pass
\$\endgroup\$
4
  • \$\begingroup\$ This isn't a function or fill program, but rather a snippet. You'd need to make it a verb in order for it to be valid. you could do something like 'clipcopy 'wd@,] \$\endgroup\$ Mar 1, 2017 at 22:15
  • \$\begingroup\$ Which "this" are you referring to? Both chunks of code are executable .ijs files. \$\endgroup\$
    – Dane
    Mar 1, 2017 at 23:28
  • \$\begingroup\$ I might have simply misunderstood. Sorry 'bout that haha. Anyhow, you can remove the space in between wd and 'clipcopy'. \$\endgroup\$ Mar 1, 2017 at 23:32
  • \$\begingroup\$ Thanks! Shaved off a byte. I'm just so used to spaces to help me read J that I didn't think about it. \$\endgroup\$
    – Dane
    Mar 1, 2017 at 23:51
5
\$\begingroup\$

Java 8 (JavaFX), 61 bytes

()->javafx.scene.input.Clipboard.getSystemClipboard().clear()

The JavaFX API for manipulating the clipboard is a little more terse than AWT's ;)

\$\endgroup\$
5
\$\begingroup\$

Tcl/Tk wish shell (REPL), 5 bytes

cli c

Wish shell (REPL) allows for the incomplete commands, as long as there is no ambiguity, the full command would be:

clipboard clear
\$\endgroup\$
0
5
\$\begingroup\$

Cow, 9 bytes

OOOMMMOOO

Explanation:

OOO set current memory block to 0
MMM if the current memory block is 0, paste the clipboard and clear the clipboard.
OOO set it back to 0
\$\endgroup\$
1
  • 2
    \$\begingroup\$ This doesn't work: all it does is copy 0 to COW's internal register, which has nothing to do with the clipboard. \$\endgroup\$
    – Dingus
    Nov 9, 2020 at 4:31
5
\$\begingroup\$

HTML + JavaScript, 175 148 139 135 69 Bytes

Golfed:

<input value="c"onclick="this.select();document.execCommand('copy')">

Fiddle

Ungolfed

Got help from SitePoint

HTML:

<input style="display: none;" id="Empty" value="x">
<input id="clipclear" type="button" value="Clear The Clipboard">

JS:

function clearclip(){
empty=document.getElementById("Empty");
empty.style.display="block";
empty.select();
        document.execCommand('copy');
empty.style.display="none";
}      
document.getElementById("clipclear").addEventListener("click", clearclip, false);
\$\endgroup\$
8
  • \$\begingroup\$ jsfiddle.net/kgvwjj3k \$\endgroup\$
    – TecBrat
    Feb 27, 2017 at 18:07
  • \$\begingroup\$ Tested in FF and Chrome \$\endgroup\$
    – TecBrat
    Feb 27, 2017 at 18:10
  • 1
    \$\begingroup\$ Don't post it until you golf it. For now, you can delete your answer, edit it to golf it, and then un-delete your answer. \$\endgroup\$ Feb 27, 2017 at 18:10
  • \$\begingroup\$ @NoOneIsHere, Okay, I went ahead and golfed it. Here's the new fiddle. \$\endgroup\$
    – TecBrat
    Feb 27, 2017 at 18:34
  • 1
    \$\begingroup\$ Instead of commenting, please edit the fiddle into your answer. Also, great job on golfing. I gave you a +1. (FYI, the language is technically HTML + JavaScript.) \$\endgroup\$ Feb 27, 2017 at 18:59

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.