Function assignHidden

lib/web/polyfill.js:395–398

(target, src)

  , set    = Symbol ? simpleSet : hidden
  , safeSymbol = Symbol || uid;
function assignHidden(target, src){
  for(var key in src)hidden(target, key, src[key]);
  return target;
}

var SYMBOL_UNSCOPABLES = getWellKnownSymbol('unscopables')
  , ArrayUnscopables   = ArrayProto[SYMBOL_UNSCOPABLES] || {}