javascript bucle a través de la matriz de
var data = [1, 2, 3, 4, 5, 6];
// traditional for loop
for(let i=0; i<=data.length; i++) {
console.log(data[i]) // 1 2 3 4 5 6
}
// using for...of
for(let i of data) {
console.log(i) // 1 2 3 4 5 6
}
// using for...in
for(let i in data) {
console.log(i) // Prints indices for array elements
console.log(data[i]) // 1 2 3 4 5 6
}
// using forEach
data.forEach((i) => {
console.log(i) // 1 2 3 4 5 6
})
// NOTE -> forEach method is about 95% slower than the traditional for loop
// using map
data.map((i) => {
console.log(i) // 1 2 3 4 5 6
})
js bucle a través del objeto
const obj = { a: 1, b: 2 };
Object.keys(obj).forEach(key => {
console.log("key: ", key);
console.log("Value: ", obj[key]);
} );
js bucle de la matriz de
let colors = ['red', 'green', 'blue'];
for (const color of colors){
console.log(color);
}
javascript para de
const array = ['hello', 'world', 'of', 'Corona'];
for (const item of array) {
console.log(item);
}
js bucle a través del objeto
const obj = { a: 1, b: 2 };
Object.keys(obj).forEach(key => {
console.log("key: ", key);
console.log("Value: ", obj[key]);
} );
javascript bucle a través de la matriz de
const myArray = ['foo', 'bar'];
myArray.forEach(x => console.log(x));
//or
for(let i = 0; i < myArray.length; i++) {
console.log(myArray[i]);
}
javascript bucle a través de la matriz de
const myArray = ['foo', 'bar'];
myArray.forEach(x => console.log(x));
//or
for(let i = 0; i < myArray.length; i++) {
console.log(myArray[i]);
}
N
const myArray = ['foo', 'bar'];
myArray.forEach(x => console.log(x));
//or
for(let i = 0; i < myArray.length; i++) {
console.log(myArray[i]);
}
N
const array = [1, 2, 3];array.forEach(function(elem, index, array) { array[index] = elem * 2;});console.log(array); // [2,4,6]
objeto de javascript de la matriz de iteración
let obj = {
key1: "value1",
key2: "value2",
key3: "value3"
}
Object.keys(obj).forEach(key => {
let value = obj[key];
//use key and value here
});
para los arrays de javascript
let iterable = [10, 20, 30];
for (let value of iterable) {
value += 1;
console.log(value);
}
// 11
// 21
// 31
N
function* fibonacci() { // a generator function
let [prev, curr] = [0, 1];
while (true) {
[prev, curr] = [curr, prev + curr];
yield curr;
}
}
for (const n of fibonacci()) {
console.log(n);
// truncate the sequence at 1000
if (n >= 1000) {
break;
}
}
foreach objeto js
const object1 = {
a: 'somestring',
b: 42
};
for (let [key, value] of Object.entries(object1)) {
console.log(`${key}: ${value}`);
}
// expected output:
// "a: somestring"
// "b: 42"
// order is not guaranteed
N
const iterable = [10, 20, 30];
for (const value of iterable) {
console.log("fef"+value);
}
// 10
// 20
// 30