package.src.arrays.sum.js Maven / Gradle / Ivy
import "../math/number";
d3.sum = function(array, f) {
var s = 0,
n = array.length,
a,
i = -1;
if (arguments.length === 1) {
while (++i < n) if (d3_numeric(a = +array[i])) s += a; // zero and null are equivalent
} else {
while (++i < n) if (d3_numeric(a = +f.call(array, array[i], i))) s += a;
}
return s;
};