javascript - 我如何在 json stringify 输出中获取特定对象？

Question

任何人都可以帮助我如何获取 json 中的特定对象吗？

我只想总结字符串化输出中的所有 3 个。

var arr_question = [{"$1z_1":3,"$2o_1":"Question 1."},{"$1z_1":3,"$2o_1":"Question2."},{"$1z_1":3,"$2o_1":"Question3."}];

console.log("output: "+arr_question.$1z_1);
console.log("arrays: "+arr_question)

Answer 1

你有一个对象数组。您需要遍历数组，访问属性并将它们相加。一种选择是使用 reduce 方法:

var arr_question = [{"$1z_1":3,"$2o_1":"Question 1."},{"$1z_1":3,"$2o_1":"Question2."},{"$1z_1":3,"$2o_1":"Question3."}];

console.log(
  "output: " +
  arr_question.reduce((sum, obj) => sum + obj.$1z_1, 0)
);