minus-squareQudit314159@alien.topBtoEmacs@communick.news•Any way to make a variable save its old value?linkfedilinkEnglisharrow-up1·1 year agoThe function add-variable-watcher registers a callback that is invoked whenever the variable’s value changes. You could use it to save old values in a list or other data structure. linkfedilink
The function
add-variable-watcherregisters a callback that is invoked whenever the variable’s value changes. You could use it to save old values in a list or other data structure.