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import {_isArray} from './_internals/_isArray'import {_keys} from './_internals/_keys'
export function forEach(fn, list) {  if (arguments.length === 1) return _list => forEach(fn, _list)
  if (list === undefined) {    return  }
  if (_isArray(list)) {    let index = 0    const len = list.length
    while (index < len) {      fn(list[index])      index++    }  } else {    let index = 0    const keys = _keys(list)    const len = keys.length
    while (index < len) {      const key = keys[index]      fn(list[key], key, list)      index++    }  }
  return list}