es.typed-array.reduce.js

'use strict';
var ArrayBufferViewCore = require('../internals/array-buffer-view-core');
var $reduce = require('../internals/array-reduce').left;

var aTypedArray = ArrayBufferViewCore.aTypedArray;
var exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;

// `%TypedArray%.prototype.reduce` method
// https://tc39.es/ecma262/#sec-%typedarray%.prototype.reduce
exportTypedArrayMethod('reduce', function reduce(callbackfn /* , initialValue */) {
  var length = arguments.length;
  return $reduce(aTypedArray(this), callbackfn, length, length > 1 ? arguments[1] : undefined);
});