Foreach พาดัชนีจาวาสคริปต์
รหัสตัวอย่าง
N
var colors = ['red', 'blue', 'green'];
colors.forEach(function(color) {
console.log(color);
});N
let words = ['one', 'two', 'three', 'four'];
words.forEach((word) => {
console.log(word);
});
// one
// two
// three
// fourN
users.forEach((user, index)=>{
console.log(index); // Prints the index at which the loop is currently at
});N
let colors = ['red', 'blue', 'green'];
// idx and sourceArr optional; sourceArr == colors
colors.forEach(function(color, idx, sourceArr) {
console.log(color, idx, sourceArr)
});
// Output:
// red 0 ['red', 'blue', 'green']
// blue 1 ['red', 'blue', 'green']
// green 2 ['red', 'blue', 'green']
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