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Completed Iteration Methods P2 by Zainab Alsaffar & Heba #9

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Completed Iteration Methods P2 by Zainab Alsaffar & Heba #9

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2 changes: 2 additions & 0 deletions package-lock.json
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25 changes: 14 additions & 11 deletions src/transactions.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -22,7 +22,8 @@ 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(([type]) => type === "income");
// replace empty array with what you see is fit
}

// `filterExpenseTransactions` function that:
Expand All @@ -33,7 +34,7 @@ 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(([type]) => type === "expense"); // replace empty array with what you see is fit
}

// `calculateTotalIncome` function that:
Expand All @@ -43,8 +44,9 @@ function filterExpenseTransactions(transactions: Transaction[]): Transaction[] {
// calculateTotalIncome(transactions); // => 3200 (1000 + 1500 + 700)
function calculateTotalIncome(transactions: Transaction[]): number {
// write your code here...

return -1; // replace -1 with what you see is fit
return transactions
.filter(([type]) => type === "income")
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@taqillion taqillion Mar 11, 2025

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Why not reuse the functions you already defined?

.reduce((sum, [, amount]) => sum + amount, 0); // replace -1 with what you see is fit
}

// `calculateTotalExpenses` function that:
Expand All @@ -54,8 +56,9 @@ function calculateTotalIncome(transactions: Transaction[]): number {
// calculateTotalExpenses(transactions); // => 800 (500 + 300)
function calculateTotalExpenses(transactions: Transaction[]): number {
// write your code here...

return -1; // replace -1 with what you see is fit
return transactions
.filter(([type]) => type === "expense")
.reduce((sum, [, amount]) => sum + amount, 0); // replace -1 with what you see is fit
}

// `calculateNetTotal` function that:
Expand All @@ -66,7 +69,9 @@ function calculateTotalExpenses(transactions: Transaction[]): number {
function calculateNetTotal(transactions: Transaction[]): number {
// write your code here...

return -1; // replace -1 with what you see is fit
return (
calculateTotalIncome(transactions) - calculateTotalExpenses(transactions)
); // replace -1 with what you see is fit
}

// `filterSignificantTransactions` function that:
Expand All @@ -80,9 +85,7 @@ function filterSignificantTransactions(
transactions: Transaction[],
threshold: number
): Transaction[] {
// write your code here...

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

export {
Expand All @@ -93,4 +96,4 @@ export {
calculateTotalExpenses,
calculateNetTotal,
filterSignificantTransactions,
};
};