循环遍历对象的JavaScript数组并删除值

var arr = [1, 2, 3, 4, 5];
var valueToDelete = 3;

for (var i = 0; i < arr.length; i++) {
  if (arr[i] === valueToDelete) {
    delete arr[i];
  }
}

console.log(arr); // [1, 2, empty, 4, 5]

var arr = [1, 2, 3, 4, 5];
var valueToDelete = 3;

var newArr = arr.filter(function(value) {
  return value !== valueToDelete;
});

console.log(newArr); // [1, 2, 4, 5]

var arr = [1, 2, 3, 4, 5];
var valueToDelete = 3;

for (var i = 0; i < arr.length; i++) {
  if (arr[i] === valueToDelete) {
    arr.splice(i, 1);
    i--; // 由于删除了一个元素，需要将索引减1
  }
}

console.log(arr); // [1, 2, 4, 5]