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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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15
Task/Jensens-Device/R/jensens-device.r Normal file
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sum <- function(var, lo, hi, term)
eval(substitute({
.temp <- 0;
for (var in lo:hi) {
.temp <- .temp + term
}
.temp
}, as.list(match.call()[-1])),
enclos=parent.frame())
sum(i, 1, 100, 1/i) #prints 5.187378
##and because of enclos=parent.frame(), the term can involve variables in the caller's scope:
x <- -1
sum(i, 1, 100, i^x) #5.187378