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solved #486

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solved #486

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347cf93
solved lab
JihanSh Jan 21, 2025
72a24a6
solved lab
JihanSh Jan 21, 2025
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72 changes: 40 additions & 32 deletions src/presidents.js
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Original file line number Diff line number Diff line change
Expand Up @@ -412,54 +412,62 @@ const presidents = [
tookOffice: 2021,
leftOffice: null,
party: "Democratic",
}
},
];




// Iteration 1 | Names of All Presidents - `map()`
function getNames(presidentsArr) {}



function getNames(presidentsArr) {
return presidentsArr.map((presidents) => presidents.name);
}
console.log(getNames(presidents));

// Iteration 2 | Democratic Presidents - `filter()`
function getDemocraticPresidents(presidentsArr) {}



function getDemocraticPresidents(presidentsArr) {
return presidentsArr.filter(
(presidents) => presidents.party === "Democratic"
);
}
console.log(getDemocraticPresidents(presidents));

// Iteration 3 | Count Years in Office - reduce()
function countYearsInOffice(presidentsArr) {}



function countYearsInOffice(presidentsArr) {
return presidentsArr.reduce(function (totalYears, president) {
if (president.leftOffice === "null ") return totalYears;
const yearsInOffice = president.leftOffice - president.tookOffice;
return totalYears + yearsInOffice;
}, 0);
}
console.log(countYearsInOffice(presidents));

// Iteration 4 | Sort Presidents by Birth Year - `sort()`
function sortPresidentsByBirthYear(presidentsArr) {}



function sortPresidentsByBirthYear(presidentsArr) {
return presidentsArr.sort((a, b) => a.birthYear - b.birthYear);
}
console.log(sortPresidentsByBirthYear(presidents));

// Bonus: Iteration 5 | Age at Inauguration - `map()`
function getAgeAtInauguration(presidentsArr) {}



function getAgeAtInauguration(presidentsArr) {
const arrInauguration = presidentsArr.map((president) => {
const ageOfInauguration = president.tookOffice - president.birthYear;
return {
...president,
ageOfInauguration: ageOfInauguration,
};
});
return arrInauguration;
}
console.log(getAgeAtInauguration(presidents));

// Bonus: Iteration 6 | Presidents Born After - `filter()`
function getPresidentsBornAfter(presidentsArr, year) {}



function getPresidentsBornAfter(presidentsArr, year) {
return presidentsArr.filter((president) => {
president.birthYear > year;
});
}
console.log(getPresidentsBornAfter(presidents,1790));

// Bonus: Iteration 7 | Count Republican Presidents
function countRepublicanPresidents(presidentsArr) {}




// Bonus: Iteration 8 | Sort Presidents by Name - `sort()`
function sortPresidentsByName(presidentsArr) {}