/* 💡"JavaScript-with-JC"

👉 Implementation of filter method using reduce.

*/

// array of numbers

const numbers = [1, 2, 3, 4, 5, 6];

const isOddNumber = (element, index, array) => {

if (element % 2) {

return true;

}

return false;

};

const oddNumbers = numbers.filter(isOddNumber);

console.log("oddNumbers", oddNumbers); // [ 1, 3, 5 ]

// Implementation of filter using reduce method

const reduceOddNumbers = numbers.reduce((acc, curr, index, array) => {

if (isOddNumber(curr, index, array)) {

acc.push(curr);

}

return acc;

}, []);

console.log("reduceOddNumbers", reduceOddNumbers); // [ 1, 3, 5 ]

console.log("--------------------------------------------------------");

// array of objects

const todos = [

{ id: 1, todo: "Morning Walk" },

{ id: 2, todo: "Go to Office" },

{ id: 3, todo: "Watch Netflix" },

{ id: 4, todo: "Go to Gym" },

{ id: 5, todo: "Go for Movie" },

];

const filterTodo = (todoItem, index, array) => {

return todoItem.id !== 2;

};

const resultTodos = todos.filter(filterTodo);

console.log("resultTodos", resultTodos);

// Implementation of filter using reduce method

const reduceResultTodos = todos.reduce((acc, curr, index, array) => {

if (filterTodo(curr, index, array)) {

acc.push(curr);

}

return acc;

}, []);

console.log("reduceResultTodos", reduceResultTodos);