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| // ES5 forEach
var arr = [1, 2, 3];
arr.forEach(function(item, index, array) {
console.log(item, index);
});
// ES6 for...of
var arr = [1, 2, 3];
for (let item of arr) {
console.log(item);
}
// ES6 entries() + destructuring
var arr = [1, 2, 3];
for (let [index, item] of arr.entries()) {
console.log(index, item);
}
// ES6 entries() + forEach()
var arr = [1, 2, 3];
arr.entries().forEach(function(item) {
console.log(item[0], item[1]);
});
// ES6 map()
var arr = [1, 2, 3];
arr.map(function(item, index) {
console.log(item, index);
});
// ES6 reduce()
var arr = [1, 2, 3];
arr.reduce(function(prev, curr, index) {
console.log(prev, curr, index);
});
// ES6 filter()
var arr = [1, 2, 3];
arr.filter(function(item, index) {
console.log(item, index);
});
// ES6 find()
var arr = [1, 2, 3];
arr.find(function(item, index) {
console.log(item, index);
});
// ES6 findIndex()
var arr = [1, 2, 3];
arr.findIndex(function(item, index) {
console.log(item, index);
});
// ES6 some()
var arr = [1, 2, 3];
arr.some(function(item, index) {
console.log(item, index);
});
// ES6 every()
var arr = [1, 2, 3];
arr.every(function(item, index) {
console.log(item, index);
});
// for loop
var arr = [1, 2, 3];
for (var i = 0; i < arr.length; i++) {
console.log(arr[i]);
}
// for loop with cached length
var arr = [1, 2, 3];
for (var i = 0, len = arr.length; i < len; i++) {
console.log(arr[i]);
}
// while loop
var arr = [1, 2, 3];
var i = 0;
while (i < arr.length)
|