Array.prototype.findIndex
qbolec opened this issue · comments
I believe that Array.prototype.findIndex is a new feature of es6, see: http://www.ecma-international.org/ecma-262/6.0/#sec-array.prototype.findIndex
and https://developer.mozilla.org/pl/docs/Web/JavaScript/Reference/Global_Objects/Array/findIndex
However, I don't see it mentioned at http://es6-features.org/#ArrayElementFinding