assign.js

assign.js

import { ERRORTYPES as error } from "./error";

¶

assign from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign
```
function assign(target, varArgs) {
```

.length of function is 2

  "use strict";
  if (target == null) {
    return error.nil;
  }

  var to = Object(target);

  for (var index = 1; index < arguments.length; index++) {
    var nextSource = arguments[index];

    if (nextSource != null) {

¶

Skip over if undefined or null
```
      for (var nextKey in nextSource) {
```

Avoid bugs when hasOwnProperty is shadowed

        if (Object.prototype.hasOwnProperty.call(nextSource, nextKey)) {
          to[nextKey] = nextSource[nextKey];
        }
      }
    }
  }
  return to;
}

Ponyfill or Object.assign with empty initial object.

export default function(initial, ...list) {
  let func = Object.assign || assign;
  return func({}, initial, ...list);
}