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Averages/Simple moving average: Difference between revisions
→{{header|D}}
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Added 2, sma(3) = 3.000000, sma(5) = 3.800000
Added 1, sma(3) = 2.000000, sma(5) = 3.000000</pre>
This version avoids the heap allocation of the closure, same output:
<pre>import std.stdio, std.traits, std.algorithm;
struct SMA(T, int period) {
T[period] data = 0;
T sum = 0;
int index, nfilled;
auto opCall(T v) {
sum += -data[index] + v;
data[index] = v;
index = (index + 1) % period;
nfilled = min(period, nfilled + 1);
return cast(CommonType!(T, float))sum / nfilled;
}
}
void main() {
SMA!(int, 3) s3;
SMA!(double, 5) s5;
foreach (e; [1, 2, 3, 4, 5, 5, 4, 3, 2, 1])
writefln("Added %d, sma(3) = %f, sma(5) = %f", e, s3(e), s5(e));
}</pre>
=={{header|E}}==
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