team teach 3.4 string operations

_notebooks/Foundation/2024-09-24-team_teach.ipynb

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+    "---\n",
+    "toc: true\n",
+    "layout: post\n",
+    "type: hacks\n",
+    "courses: { compsci: {week: 14} }\n",
+    "title: String Operations Notebook\n",
+    "description: 3.4 Team Teach String Operations\n",
+    "---"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## What are String Operations?\n",
+    " - String Operations allow us to manipulate and work with text-based data\n",
+    " - NEED to know for handling input/output (big in algorithmic coding), formatting, and data processing"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Measuring String Length\n",
+    " - The len() function in Python allows us to find the length of a string\n",
+    " - Use .length in JavaScript to do this as well"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "5\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(len(\"Hello\"))"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    " - Use Case: Determine number of characters in string (eg for validation of password length)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## String Case Convertion\n",
+    " - Uppercase: Convert to uppercase using .upper() in Python\n",
+    " - Lowercase: Convert to lowercase using .lower() in Python"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "HELLO\n",
+      "hello\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(\"hello\".upper())\n",
+    "print(\"HELLO\".lower())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    " - Use Case: Useful for standardizing text inputs, like making email addresses case-insensitive"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## String Slicing\n",
+    " - Through string slicing, we can access a part of the string using indexes\n",
+    " - Each character in a string gets assigned a index, starting from 0\n",
+    " - Syntax is [startindex:endindex]"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Hello\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(\"Hello World\"[0:5])"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    " - Use Case: Extract substrings, like the first word from a sentence"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Finding Substrings\n",
+    " - Searches for a substring and returns its position within a overlaying string\n",
+    " - .find() in Python"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "6\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(\"Hello World\".find(\"World\"))"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    " - Use Case: Helpful for parsing text or finding key words"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Replacing Substrings\n",
+    " - Can replace different parts of a string with something else\n",
+    " - .replace() in Python"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 7,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Hello Mihir\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(\"Hello World\".replace(\"World\", \"Mihir\"))"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    " - Use Case: Useful for replacing specific parts of text without having to re initiate the whole thing again"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Splitting Strings\n",
+    " - Splits a string into a list of substrings based on a delimiter (most commonly a space or comma)\n",
+    " - .split() in Python"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 8,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['apple', 'banana', 'grape']\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(\"apple,banana,grape\".split(\",\"))"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    " - Use Case: Parse through CSV files or processing large lists of items"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Joining Strings\n",
+    " - Basically opposite of splitting strings\n",
+    " - .join() in Python\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 9,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "apple,banana,grape\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(\",\".join(['apple', 'banana', 'grape']))"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    " - Use Case: Combine a list of strings into a single string, helpful for reformatting content"
+   ]
+  }
+ ],
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