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const data = [
{ name: 'John', age: 30, group: 'A' },
{ name: 'Mary', age: 25, group: 'B' },
{ name: 'Mike', age: 20, group: 'A' },
{ name: 'Jane', age: 15, group: 'C' },
{ name: 'Peter', age: 25, group: 'B' }
];
// for loop
for (let i = 0; i < data.length; i++) {
console.log(data[i]);
}
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var person={
first_name:"johnny",
last_name: "johnson",
phone:"703-3424-1111"
};
for (var property in person) {
console.log(property,":",person[property]);
}
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var cars = [{name: 'Audi'}, {name: 'BMW'}, {name: 'Ferrari'}, {name: 'Mercedes'}, {name: 'Maserati'}];
for(var i = 0; i < cars.length; i++) {
console.log(cars[i].name);
}
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const data = [
{ name: 'John', age: 30, group: 'A' },
{ name: 'Mary', age: 25, group: 'B' },
{ name: 'Mike', age: 20, group: 'A' },
{ name: 'Jane', age: 15, group: 'C' },
{ name: 'Peter', age: 25, group: 'B' }
];
// for loop
for (let i = 0; i < data.length; i++) {
console.log(data[i]);
}
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const data = [
{ name: 'John', age: 30, group: 'A' },
{ name: 'Mary', age: 25, group: 'B' },
{ name: 'Mike', age: 20, group: 'A' },
{ name: 'Jane', age: 15, group: 'C' },
{ name: 'Peter', age: 25, group: 'B' }
];
// forEach loop
data.forEach(function(item, index) {
console.log(item, index);
});
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const myArray = [{x:100}, {x:200}, {x:300}];
myArray.forEach((element, index, array) => {
console.log(element.x); // 100, 200, 300
console.log(index); // 0, 1, 2
console.log(array); // same myArray object 3 times
});
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const data = [
{ name: 'John', age: 30, group: 'A' },
{ name: 'Mary', age: 25, group: 'B' },
{ name: 'Mike', age: 20, group: 'A' },
{ name: 'Jane', age: 15, group: 'C' },
{ name: 'Peter', age: 25, group: 'B' }
];
// for...in loop
for (const index in data) {
console.log(index, data[index]);
}
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var array = ["e", 5, "cool", 100];
for (let i = 0; i < array.length; i++) {
console.log(array[i]);
}
// This is a common method used to loop through elements in arrays.
// You can use this to change elements, read them, and edit them