Terminal applications have a “cursor” that they can move around, just like a text editor. You can tell that cursor “go to line 3, delete everything, then print out this new text” by using VT100 sequences. And you can use it to replace existing characters with new ones, without re-emitting a whole line.
Implicit Trust Upgrade: Google retroactively applied sensitive privileges to existing keys that were already rightfully deployed in public environments (e.g., JavaScript bundles).
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let weights[palette size] = weight for each colour