You just blew my mind. sudo [space][shift] !! [enter] (4+1+1+1+1+1) is one keypress longer than ↑ + home + sudo + space + enter (1+1+4+1+1). In your face, universe.
Actually, after kinematic analysis of the required fingertip trajectories upheaves both of these arguments. If you calculate the aggregate spatial displacement across a standard 2D Euclidean plane for both input strings, the former macro sequence yields a significantly lower metric footprint than the latter.
For the sake of empirical demonstration, we can map this across a standard ANSI 100% layout using a normalized key pitch constraint where 1 U = 19.05 mm. By establishing a Home Row Idle-State Matrix as our behavioral anchor and tracking independent multi-finger vectors using the standard Pythagorean metric tensor—calculating the straight-line distance d = sqrt( delta_x^2 + delta_y^2 ) between consecutive keystroke coordinates—we arrive at the following quantitative breakdown:
Macro Sequence 1: sudo [shift] !! [enter]
Single-Handed Vector String: 40.878 U
Net Linear Displacement: 778.7 mm
Dual-Handed Touch-Typing Matrix: 8.424 U
Net Linear Displacement: 160.5 mm
Macro Sequence 2: [up][home] sudo [space][enter]
Single-Handed Vector String: 40.989 U
Net Linear Displacement: 780.8 mm
Dual-Handed Touch-Typing Matrix: 21.728 U
Net Linear Displacement: 413.9 mm
tl;dr
Fewer keystrokes != less work. Even though typing !! looks like more work, it isn’t because your finger travel distance is significantly shorter when executing those keys using two-handed touch typing on a standard ANSI QWERTY keyboard.
Maybe someone who only used csh? I can’t remember if ^a is a default in that shell. I thought it started with ksh or bash.
ETA: just looked it up and I’m dumb. Comes from emacs (of course) and looks like it was introduced in bash. I guess I could claim ignorance, being a VI man, but I actually knew at some point that it came from emacs. I think I can count on 1 hand the number of times I’ve used emacs
Ayo chill
I approve of the ice to coke ratio. I am now chill.
Good
How about just one keyboard shortcut and enter.
Start with ctrl+p, ctrl+a but yes
Always amused me that
sudo !!is actually more keypresses (at least on keyboards where typing!requires holding Shift).You just blew my mind.
sudo [space] [shift] !! [enter](4+1+1+1+1+1) is one keypress longer than↑ + home + sudo + space + enter(1+1+4+1+1). In your face, universe.Actually, after kinematic analysis of the required fingertip trajectories upheaves both of these arguments. If you calculate the aggregate spatial displacement across a standard 2D Euclidean plane for both input strings, the former macro sequence yields a significantly lower metric footprint than the latter.
For the sake of empirical demonstration, we can map this across a standard ANSI 100% layout using a normalized key pitch constraint where 1 U = 19.05 mm. By establishing a Home Row Idle-State Matrix as our behavioral anchor and tracking independent multi-finger vectors using the standard Pythagorean metric tensor—calculating the straight-line distance d = sqrt( delta_x^2 + delta_y^2 ) between consecutive keystroke coordinates—we arrive at the following quantitative breakdown:
Macro Sequence 1:
sudo [shift] !! [enter]Macro Sequence 2:
[up] [home] sudo [space] [enter]tl;dr
Fewer keystrokes != less work. Even though typing !! looks like more work, it isn’t because your finger travel distance is significantly shorter when executing those keys using two-handed touch typing on a standard ANSI QWERTY keyboard.
Edit: I will forward your thesis to the cat.
My day started out catastrophically bad, resulting in taking a sick day.
Then came you.
I cried and laughed in some sequence and it gave me the energy to get out of bed. Now, I will have breakfast*.
*Loose definition.
bows thank you thank you. Glad about my efforts being well received, and even more so it got you out of bed! Cheers and may your day remain on the up.
If you have an actual home key. If it’s ctrl+a or (IIRC, AFK) ctrl+← then we’re even.
And if we track hand movements then pressing ! twice may be faster than moving to another key.
But yeah, it’s not at all clear that
sudo !!is faster like you’d expect it to be.But it’s faster since your hand move less and you can keep
shiftpressedI use zsh with the sudo plugin. Double tap
escand your current or last command will be prefixed with sudo.I don’t dabble in black magic. /j
It’s actually pretty neat.
Ctrl A is easier to reach than the home key
Unless you’re in a default screen session (I always thought ^A was such a dumb default for screen to use).
Screen must have been written by someone who wasn’t familiar with the shell. It’s the only logical explanation.
Maybe someone who only used csh? I can’t remember if ^a is a default in that shell. I thought it started with ksh or bash.
ETA: just looked it up and I’m dumb. Comes from emacs (of course) and looks like it was introduced in bash. I guess I could claim ignorance, being a VI man, but I actually knew at some point that it came from emacs. I think I can count on 1 hand the number of times I’ve used emacs