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done part2 irretation #18

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done part2 irretation #18

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35 changes: 28 additions & 7 deletions src/transactions.ts
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Original file line number Diff line number Diff line change
@@ -1,3 +1,5 @@
import { T } from "@faker-js/faker/dist/airline-BcEu2nRk";

// don't edit or remove the type declaration
type TransactionType = "income" | "expense";
type Transaction = [TransactionType, number];
Expand All @@ -13,6 +15,7 @@ const transactions: Transaction[] = [
["expense", 300],
["income", 700],
];
console.log(transactions);

// `filterIncomeTransactions` function that:
// - Accepts a "transactions" parameter of type "Transaction[]".
Expand All @@ -22,8 +25,9 @@ const transactions: Transaction[] = [
function filterIncomeTransactions(transactions: Transaction[]): Transaction[] {
// write your code here...

return []; // replace empty array with what you see is fit
return transactions.filter((transaction) => transaction[0] === "income"); // replace empty array with what you see is fit
}
console.log(filterIncomeTransactions(transactions));

// `filterExpenseTransactions` function that:
// - Accepts a "transactions" parameter of type "Transaction[]".
Expand All @@ -33,8 +37,9 @@ function filterIncomeTransactions(transactions: Transaction[]): Transaction[] {
function filterExpenseTransactions(transactions: Transaction[]): Transaction[] {
// write your code here...

return []; // replace empty array with what you see is fit
return transactions.filter((transaction) => transaction[0] === "expense"); // replace empty array with what you see is fit
}
console.log(filterExpenseTransactions(transactions));

// `calculateTotalIncome` function that:
// - Accepts a "transactions" parameter of type "Transaction[]".
Expand All @@ -44,9 +49,13 @@ function filterExpenseTransactions(transactions: Transaction[]): Transaction[] {
function calculateTotalIncome(transactions: Transaction[]): number {
// write your code here...

return -1; // replace -1 with what you see is fit
return transactions
.filter((transaction) => transaction[0] === "income")
.reduce((total, transaction) => total + transaction[1], 0); // replace -1 with what you see is fit
}

console.log(calculateTotalIncome(transactions));

// `calculateTotalExpenses` function that:
// - Accepts a "transactions" parameter of type "Transaction[]".
// - calculates the total expense and returns it.
Expand All @@ -55,8 +64,11 @@ function calculateTotalIncome(transactions: Transaction[]): number {
function calculateTotalExpenses(transactions: Transaction[]): number {
// write your code here...

return -1; // replace -1 with what you see is fit
return transactions
.filter((transaction) => transaction[0] === "expense")
.reduce((total, transaction) => total + transaction[1], 0); // replace -1 with what you see is fit
}
console.log(calculateTotalExpenses(transactions));

// `calculateNetTotal` function that:
// - Accepts a "transactions" parameter of type "Transaction[]".
Expand All @@ -65,10 +77,17 @@ function calculateTotalExpenses(transactions: Transaction[]): number {
// calculateNetTotal(transactions); // => 2400 (3200 - 800)
function calculateNetTotal(transactions: Transaction[]): number {
// write your code here...

return -1; // replace -1 with what you see is fit
const totalIncome = transactions
.filter((transaction) => transaction[0] === "income")
.reduce((total, transaction) => total - transaction[1], 0);
const totalExpenses = transactions
.filter((transaction) => transaction[0] === "expense")
.reduce((total, transaction) => total - transaction[1], 0);
return totalIncome - totalExpenses;
}

console.log(calculateNetTotal(transactions));

// `filterSignificantTransactions` function that:
// - Accepts 2 parameters:
// - a "transactions" parameter of type "Transaction[]".
Expand All @@ -82,9 +101,11 @@ function filterSignificantTransactions(
): Transaction[] {
// write your code here...

return []; // replace empty array with what you see is fit
return transactions.filter((transaction) => transaction[1] >= threshold); // replace empty array with what you see is fit
}

console.log(filterSignificantTransactions(transactions, 1000));

export {
Transaction,
filterIncomeTransactions,
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