BUG: d3-array/dist/d3-array.js: Unexpected token (139:15) about d3-array

[mbostock]

Duplicate of #147.

[cederom]

Looks like this code got unreadable even for the compiler ;-) Please help @Fil @mbostock :-)

export default function cumsum(values, valueof) {
  var sum = 0, index = 0;
  return Float64Array.from(values, valueof === undefined
    ? v => (sum += +v || 0)
    : v => (sum += +valueof(v, index++, values) || 0));
}

d3-array/src/cumsum.js

Line 1 in 61cc940

export default function cumsum(values, valueof) {

[cederom]

Hey @mbostock why did you close with no comment?! Syntax looks invalid! When I replace that code with return 0 everything works fine. Are you sure this syntax is okay??? Looks like a BUG!

[cederom]

This is a Babel compiler bug then, should be solved with babel/babel#13581. Thanks for the hint. I am embedded developer working mostly with C.. man this JavaScript stuff is a wild thing :-) :-)