如何在函数中根据条件为priceFilter赋值布尔值？代码实现求助

Hey there! Let's get your price filter logic working correctly. The key mistake in your current code is that you're comparing the entire $scope.options array to individual string values—this will never match, since an array can't be equal to a single string. Instead, you need to use the priceFilter parameter that gets passed into your function (that's the selected option value from your list!).

修正后的完整代码 #

$scope.options = ['Low Price To High', 'High Price To Low']; 
$scope.selectPriceFilter = function (priceFilter) { 
  // 用传入的priceFilter参数做判断，而不是整个options数组
  if (priceFilter === 'Low Price To High') { 
    $scope.priceFilter = false; 
  } else if (priceFilter === 'High Price To Low') { 
    $scope.priceFilter = true; 
  } 
}

更简洁的写法（可选） #

如果想让代码更紧凑，你可以直接利用布尔表达式的结果赋值，因为你的判断逻辑刚好对应布尔值需求：

$scope.options = ['Low Price To High', 'High Price To Low']; 
$scope.selectPriceFilter = function (priceFilter) { 
  $scope.priceFilter = priceFilter === 'High Price To Low';
}

这里当选中"High Price To Low"时，表达式返回true；选中另一个选项时返回false，完美匹配你的需求。

内容的提问来源于stack exchange，提问作者Bhawneet Singh