有没有更好/更快的方法来实现像这样的多个if语句？

switch(expression) {
  case value1:
    // code to be executed if expression === value1
    break;
  case value2:
    // code to be executed if expression === value2
    break;
  default:
    // code to be executed if none of the cases are matched
}

const actions = {
  action1: () => { /* do something */ },
  action2: () => { /* do something else */ },
  // ...
};

const action = actions[someCondition];
if (action) {
  action();
} else {
  // default action
}

class Strategy {
  doOperation() {}
}

class OperationAdd extends Strategy {
  doOperation(num1, num2) {
    return num1 + num2;
  }
}

class OperationSubtract extends Strategy {
  doOperation(num1, num2) {
    return num1 - num2;
  }
}

class Context {
  constructor(strategy) {
    this.strategy = strategy;
  }

  executeStrategy(num1, num2) {
    return this.strategy.doOperation(num1, num2);
  }
}

const contextAdd = new Context(new OperationAdd());
console.log("10 + 5 = " + contextAdd.executeStrategy(10, 5));

const contextSubtract = new Context(new OperationSubtract());
console.log("10 - 5 = " + contextSubtract.executeStrategy(10, 5));

const data = [1, 2, 3, 4, 5];
const result = data.map(x => x * 2); // [2, 4, 6, 8, 10]

const result = condition ? valueIfTrue : valueIfFalse;