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done #22

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24 changes: 12 additions & 12 deletions src/transactions.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -21,8 +21,7 @@ const transactions: Transaction[] = [
// filterIncomeTransactions(transactions); // => [["income", 1000], ["income", 1500], ["income", 700]]
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 @@ -32,8 +31,7 @@ function filterIncomeTransactions(transactions: Transaction[]): Transaction[] {
// filterExpenseTransactions(transactions); // => [["expense", 500], ["expense", 300]]
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");
}

// `calculateTotalIncome` function that:
Expand All @@ -43,8 +41,9 @@ 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((transaction) => transaction[0] === "income")
.reduce((total, transaction) => total + transaction[1], 0);
}

// `calculateTotalExpenses` function that:
Expand All @@ -54,8 +53,9 @@ 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((transaction) => transaction[0] === "expense")
.reduce((total, transaction) => total + transaction[1], 0);
}

// `calculateNetTotal` function that:
Expand All @@ -65,8 +65,9 @@ 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 = calculateTotalIncome(transactions);
const totalExpenses = calculateTotalExpenses(transactions);
return totalIncome - totalExpenses;
}

// `filterSignificantTransactions` function that:
Expand All @@ -81,8 +82,7 @@ function filterSignificantTransactions(
threshold: number
): Transaction[] {
// write your code here...

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

export {
Expand Down