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   "source": [
    "### <center>San Jose State University<br>Department of Applied Data Science<br><br>**DATA 200<br>Computational Programming for Data Analytics**<br><br>Spring 2024<br>Instructor: Ron Mak</center>"
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   "source": [
    "# Lambda Expressions\n",
    "#### A ***lambda expression*** is a nameless function used in specific situations where the function is automatically called."
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    "## Filter out all odd values from a list of integers.\n",
    "``` Python\n",
    "lambda x: (x%2 == 0)\n",
    "```"
   ]
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   "id": "0de550df-fa55-4bff-b787-8039175c2949",
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   "source": [
    "lst = list(range(20))\n",
    "lst"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "517f54c7-2037-4eea-9264-a2e1691bb785",
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   "source": [
    "evens = list(filter(lambda x: (x%2 == 0), lst))\n",
    "evens       "
   ]
  },
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   "source": [
    "## Map all words to upper case.\n",
    "``` Python\n",
    "lambda pet: (pet.upper())\n",
    "```          "
   ]
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  {
   "cell_type": "code",
   "execution_count": null,
   "id": "ba7d9ba1-5bd6-457a-a252-6ef893a8f8a1",
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   "source": [
    "pets = ['cat', 'kitten', 'dog', 'puppy', 'goldfish', 'parrot']\n",
    "pets"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "1a08c184-35c3-46fd-867e-08a22a4ded5d",
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   "source": [
    "uppers = list(map(lambda pet: (pet.upper()), pets))\n",
    "uppers"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "7f2d4de6-8e7e-4748-b848-728f742f42bb",
   "metadata": {},
   "source": [
    "#### (c) 2023 by Ronald Mak"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "190a085f-d5e1-4251-9ec4-b02b0a717043",
   "metadata": {},
   "outputs": [],
   "source": []
  }
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