Fat Arrows and This

export default function () { console.log('hi!'); }

export default function () { console.log('hi!'); }

function anonymous() {}

function anonymous() {}

class SMSSender extends Sender {
  formatMessage(message) {
    return `${super.formatMessage(message)} [SMS]`;
  }
}

class SMSSender extends Sender {
  formatMessage(message) {
    return `${super.formatMessage(message)} [SMS]`;
  }
}

  formatMessage(message) {
    return `To: ${this.recipient}, Message: ${message}`;
  }

  formatMessage(message) {
    return `To: ${this.recipient}, Message: ${message}`;
  }

function bulkSendCost(numMessages) {
  let totalCost = 0;
  for (let i = 0; i < numMessages; i++) {
totalCost += 1.0 + (i * 0.01);
  }
  return totalCost;
}

export { bulkSendCost };

function bulkSendCost(numMessages) {
  let totalCost = 0;
  for (let i = 0; i < numMessages; i++) {
totalCost += 1.0 + (i * 0.01);
  }
  return totalCost;
}

export { bulkSendCost };

let total = 0;
const BASE_COST = 1.0;

messages.forEach((message, index) => {
  total += BASE_COST + (index / 100);
});

let total = 0;
const BASE_COST = 1.0;

messages.forEach((message, index) => {
  total += BASE_COST + (index / 100);
});

function bulkSendCost(numMessages) {
  return (function* () { 
    for(let i = 0;;) { 
      yield i++;
    }
  })()
    .take(numMessages)
      .reduce((acc, i) => acc + i * .01, 0) + numMessages;
}

function bulkSendCost(numMessages) {
  return (function* () { 
    for(let i = 0;;) { 
      yield i++;
    }
  })()
    .take(numMessages)
      .reduce((acc, i) => acc + i * .01, 0) + numMessages;
}

function* () { 
    for(let i = 0;;) { 
      yield i++;
    }
  })()

function* () { 
    for(let i = 0;;) { 
      yield i++;
    }
  })()

function bulkSendCost(numMessages) {
  return numMessages + 0.005 * numMessages * (numMessages - 1);
}

function bulkSendCost(numMessages) {
  return numMessages + 0.005 * numMessages * (numMessages - 1);
}

function splitLogs(logs, slug) {
  let i = logs.findIndex(log => log.includes(slug));
  return {
    before: i === -1 ? [] : logs.slice(0, i),
    after: i === -1 ? [] : logs.slice(i + 1),
    i,
  }
}

function splitLogs(logs, slug) {
  let i = logs.findIndex(log => log.includes(slug));
  return {
    before: i === -1 ? [] : logs.slice(0, i),
    after: i === -1 ? [] : logs.slice(i + 1),
    i,
  }
}

function addToPhonebook(phoneNumber, name, phoneBook) {
  const newPhoneBook = new Map(phoneBook);
  newPhoneBook.set(phoneNumber, name);
  return newPhoneBook
}

// don't touch below this line

export { addToPhonebook };

function addToPhonebook(phoneNumber, name, phoneBook) {
  const newPhoneBook = new Map(phoneBook);
  newPhoneBook.set(phoneNumber, name);
  return newPhoneBook
}

// don't touch below this line

export { addToPhonebook };

function addToPhonebook(phoneNumber, name, phoneBook) {
  return new Map(phoneBook)
    .set(phoneNumber, name);
}

function addToPhonebook(phoneNumber, name, phoneBook) {
  return new Map(phoneBook)
    .set(phoneNumber, name);
}

function updateMessageStatus(messageId, currentStatus, isDelivered) {
  return new Promise((resolve, reject) => {
    setTimeout(() => {
      if (currentStatus == "Sending" && isDelivered) {
        resolve(`Textio Message ${messageId} has been delivered successfully.`);
      } else if (currentStatus == "Sending" && !isDelivered) {
        reject(`Textio Message ${messageId} is still sending and cannot be marked as delivered.`);
      } else if (currentStatus !== "Sending") {
        resolve(`Textio Message ${messageId} status updated to ${currentStatus}.`)
      }
    }, 500);
  });
}

// don't touch below this line

export { updateMessageStatus };

function updateMessageStatus(messageId, currentStatus, isDelivered) {
  return new Promise((resolve, reject) => {
    setTimeout(() => {
      if (currentStatus == "Sending" && isDelivered) {
        resolve(`Textio Message ${messageId} has been delivered successfully.`);
      } else if (currentStatus == "Sending" && !isDelivered) {
        reject(`Textio Message ${messageId} is still sending and cannot be marked as delivered.`);
      } else if (currentStatus !== "Sending") {
        resolve(`Textio Message ${messageId} status updated to ${currentStatus}.`)
      }
    }, 500);
  });
}

// don't touch below this line

export { updateMessageStatus };

function sleep(ms) {
  return new Promise((resolve) => setTimeout(resolve, ms));
}

function sleep(ms) {
  return new Promise((resolve) => setTimeout(resolve, ms));
}

function startJob() {
  setTimeout(() => {
    console.log("Hi I'm async!");
  }, 0);
  console.log("Job started");
  workOnJob();
}

function startJob() {
  setTimeout(() => {
    console.log("Hi I'm async!");
  }, 0);
  console.log("Job started");
  workOnJob();
}

export function calculateTotal(
  price: number,
  quantity: number,
  discount: number,
): number {
  return price * quantity * (1 - discount);
}

export function calculateTotal(
  price: number,
  quantity: number,
  discount: number,
): number {
  return price * quantity * (1 - discount);
}

export type SupportResponse = (name: string) => string;


export const greetCustomer: SupportResponse = (name) => {
  return `Hello ${name}, welcome to Support.ai! How can I assist you today?`;
};


export const farewellCustomer: SupportResponse = (name) => {
  return `Goodbye ${name}, have a great day!`;
};

export type SupportResponse = (name: string) => string;


export const greetCustomer: SupportResponse = (name) => {
  return `Hello ${name}, welcome to Support.ai! How can I assist you today?`;
};


export const farewellCustomer: SupportResponse = (name) => {
  return `Goodbye ${name}, have a great day!`;
};