off by one


off by one or obo is a common error in computer program whereby a loop executes one time too few or too many. it occurs most commonly with complex vector or matrix scans.
programmer 1: this program doesn’t work. take a look and see if there’s anything wrong.
programmer 2: oh, this for loop is obo. you aren’t scanning the whole array.
an “off-by-one” (obo) in a non-programming context is the act of a touch-typist beginning to type with their hands one key offset from home position.

if the typist in question types fast enough, the resulting nonsense string of gibberish resembling a 14 year-old’s sms history or youtube comment may actually be sent/submitted before they notice what they’ve done.
ex 1:
sm “pgg-nu-pmr” )pnp_ om s mpm-ptphts,,omg vpmyrcy od yjr svy pg s ypivj-yupody nrhommomh yp yupr eoyj yjrot jsmfd pmr lru pggdry gtp, yjr jp,r ppdoyopm/ (-that was actually harder than i thought it’d be, though notice the prevalence of things like omg and gtp)

ex. 2:
carly1992: wanna come over to my place?
tcapreditorbate: rirakky!
tcapreditorbate: totally- sorry, off by one

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