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Iteration method part 2 #3

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Iteration method part 2 #3

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22 changes: 16 additions & 6 deletions src/transactions.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -22,7 +22,7 @@ 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");
}

// `filterExpenseTransactions` function that:
Expand All @@ -33,7 +33,7 @@ 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
}

// `calculateTotalIncome` function that:
Expand All @@ -44,7 +44,9 @@ 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
}

// `calculateTotalExpenses` function that:
Expand All @@ -55,7 +57,9 @@ 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
}

// `calculateNetTotal` function that:
Expand All @@ -66,7 +70,13 @@ function calculateTotalExpenses(transactions: Transaction[]): number {
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 totalExpense = transactions
.filter((transaction) => transaction[0] === "expense")
.reduce((total, transaction) => total + transaction[1], 0);
return totalIncome - totalExpense;
}

// `filterSignificantTransactions` function that:
Expand All @@ -82,7 +92,7 @@ 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
}

export {
Expand Down