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Here's a sample code for ESP32-CAM (image) using Arduino IDE

#include "esp_camera.h"

// Define camera pins
#define PWDN_GPIO_NUM     32
#define RESET_GPIO_NUM    -1
#define XCLK_GPIO_NUM      0
#define SIOD_GPIO_NUM     26
#define SIOC_GPIO_NUM     27

#define Y9_GPIO_NUM       35
#define Y8_GPIO_NUM       34
#define Y7_GPIO_NUM       39
#define Y6_GPIO_NUM       36
#define Y5_GPIO_NUM       21
#define Y4_GPIO_NUM       19
#define Y3_GPIO_NUM       18
#define Y2_GPIO_NUM        5
#define VSYNC_GPIO_NUM    25
#define HREF_GPIO_NUM     23
#define PCLK_GPIO_NUM     22

void setup() {
  Serial.begin(115200);
  // Initialize camera
  camera_config_t config;
  config.ledc_channel = LEDC_CHANNEL_0;
  config.ledc_timer = LEDC_TIMER_0;
  config.pin_d0 = Y2_GPIO_NUM;
  config.pin_d1 = Y3_GPIO_NUM;
  config.pin_d2 = Y4_GPIO_NUM;
  config.pin_d3 = Y5_GPIO_NUM;
  config.pin_d4 = Y6_GPIO_NUM;
  config.pin_d5 = Y7_GPIO_NUM;
  config.pin_d6 = Y8_GPIO_NUM;
  config.pin_d7 = Y9_GPIO_NUM;
  config.pin_xclk = XCLK_GPIO_NUM;
  config.pin_pclk = PCLK_GPIO_NUM;
  config.pin_vsync = VSYNC_GPIO_NUM;
  config.pin_href = HREF_GPIO_NUM;
  config.pin_sscb_sda = SIOD_GPIO_NUM;
  config.pin_sscb_scl = SIOC_GPIO_NUM;
  config.pin_pwdn = PWDN_GPIO_NUM;
  config.pin_reset = RESET_GPIO_NUM;
  config.xclk_freq_hz = 20000000;
  config.pixel_format = PIXFORMAT_JPEG;
  // Set the resolution
  config.frame_size = FRAMESIZE_SVGA;
  config.jpeg_quality = 12;
  config.fb_count = 1;
  // Initialize the camera
  esp_err_t err = esp_camera_init(&config);
  if (err != ESP_OK) {
    Serial.printf("Camera init failed with error 0x%x", err);
    return;
  }
  Serial.println("Camera initialized successfully");
}

void loop() {
  // Capture a photo
  camera_fb_t *fb = esp_camera_fb_get();
  if (!fb) {
    Serial.println("Failed to capture photo");
    return;
  }
  // Send the photo to serial port
  Serial.write(fb->buf, fb->len);
  // Release the memory
  esp_camera_fb_return(fb);
  delay(1000); // Wait for a second
}

This code initializes the ESP32-CAM camera and captures a photo using the esp_camera_fb_get() function. The photo is then sent to the serial port using the Serial.write() function. You can adjust the camera settings such as resolution and quality in the camera_config_t struct.

JavaScript String Methods code

Here are some commonly used JavaScript string methods:

length: Returns the length of a string.

const str = 'Hello, World!';
console.log(str.length); // Output: 13

toUpperCase(): Converts a string to uppercase.

const str = 'Hello, World!';
console.log(str.toUpperCase()); // Output: HELLO, WORLD!

toLowerCase(): Converts a string to lowercase.

const str = 'Hello, World!';
console.log(str.toLowerCase()); // Output: hello, world!

indexOf(): Returns the index of the first occurrence of a specified value in a string.
```
const str = 'Hello, World!';
console.log(str.indexOf('World')); // Output: 7
```

slice(): Extracts a part of a string and returns a new string.

const str = 'Hello, World!';
console.log(str.slice(7)); // Output: World!
console.log(str.slice(7, 12)); // Output: World

replace(): Searches a string for a specified value, or a regular expression, and returns a new string where the specified values are replaced.
```
const str = 'Hello, World!';
console.log(str.replace('World', 'Universe')); // Output: Hello, Universe!
```

split(): Splits a string into an array of substrings.

const str = 'Hello, World!';
console.log(str.split(',')); // Output: ['Hello', ' World!']

trim(): Removes whitespace from both ends of a string.

const str = '   Hello, World!   ';
console.log(str.trim()); // Output: Hello, World!

These are just a few of the many available JavaScript string methods.

JavaScript Events code

JavaScript events are actions or occurrences that happen in a web page, such as a user clicking a button, a page finishing loading, or a form being submitted. Here are some examples of how to handle events in JavaScript:

Handle a button click event:

var button = document.getElementById('myButton');
button.addEventListener('click', function() {
  console.log('Button clicked!');
});

Handle a page load event:

window.addEventListener('load', function() {
  console.log('Page loaded!');
});

Handle a form submission event:

var form = document.getElementById('myForm');
form.addEventListener('submit', function(event) {
  event.preventDefault();
  console.log('Form submitted!');
});

Handle a mouse over event:

var element = document.getElementById('myElement');
element.addEventListener('mouseover', function() {
  console.log('Mouse over!');
});

Handle a key press event:

document.addEventListener('keypress', function(event) {
  console.log('Key pressed: ' + event.key);
});

These are just a few examples of the types of events you can handle in JavaScript. There are many more events available, and you can also create your own custom events using the Event interface.

JavaScript Statements code

JavaScript statements are used to perform actions and make decisions in a program. Here are some common JavaScript statements:

Variable declaration: Used to declare a variable and assign it a value.
```
var x = 5;
```

Conditional statement: Used to execute different code blocks based on a condition.

if (x > 10) {
  console.log('x is greater than 10');
} else {
  console.log('x is less than or equal to 10');
}

Looping statement: Used to execute a block of code multiple times.
```
for (var i = 0; i < 10; i++) {
  console.log(i);
}
```
Function declaration: Used to define a function that can be called later in the program.
```
function add(x, y) {
  return x + y;
}
```

Switch statement: Used to execute different code blocks based on the value of a variable.

switch (day) {
  case 'Monday':
    console.log('Today is Monday');
    break;
  case 'Tuesday':
    console.log('Today is Tuesday');
    break;
  default:
    console.log('Today is not Monday or Tuesday');
}

These are just a few examples of the types of statements you can use in JavaScript. There are many more statements available that can help you perform different actions and make decisions in your program.