javascript - .splice() 从数组中移除 2 个对象而不是 1 个

Question

例如，当输入“John Smith”时，slice 会删除前两个员工姓名，而不仅仅是 John 的姓名。知道为什么会这样吗？

let removeEmployee = '';
let employees = [
  {
    name: 'John Smith'
  }, {
    name: 'Jackie Jackson'
  }, {
    name: 'Chris Jones'
  }, {
    name: 'Amanda Cullen'
  }, {
    name: 'Jeremy Goodwin'
  }, ]

removeEmployee = prompt('Enter the name of the employee to be removed:');

function employeeExists(employee) {
  return employees.some(function(el) {
    return el.name === employee;
  });
}

if (employeeExists(removeEmployee)) {
  employees.forEach(function(employee, index, object) {
    if (employee.name === removeEmployee) {
      object.splice(index, 1);
    } else {
      console.log(employee.name);
    }
  });
} else {
  console.log('That employee does not exist, please try again.');
}

Answer 1

你可以使用 filter 而不是 forEach 让事情变得更简单:

if (employeeExists(removeEmployee)) {   
    employees = employees.filter(e => e.name !== removeEmployee);
}

如果你仍然想使用splice，你可以使用findIndex:

let employees = [ {name: 'John Smith'}, {name: 'Jackie Jackson'}, {name: 'Chris Jones'}, {name: 'Amanda Cullen'}, {name: 'Jeremy Goodwin'} ];
var removeEmployee = 'Chris Jones';
var index = employees.findIndex(e => e.name === removeEmployee);
employees.splice(index, 1);
console.log(employees);