Question

我有一个JSON字符串。

"1":{"name":"AK-47 | Aquamarine Revenge (Battle-Scarred)","price":"13.55","sold":"444"},"2":{"name":"AK-47 | Aquamarine Revenge (Factory New)","price":"38.96","sold":"157"}

依旧......

如何删除数字（1,2,3等等），并使用“name”值来标识每个项目的内容？我看过lodash.keyBy，但我无法将“name”作为标识符。最终目标是能够拨打obj[itemName] - 并收到价格。

Answer 1

Lodash有一种不同的方法ERROR Error: Cannot find control with path: 'tasks -> 0 -> Roles -> 0 -> Role'，它更适合这种方式：

＆＃13;

_.mapKeys

＆＃13;

const obj = {
  "1": {
    "name":"AK-47 | Aquamarine Revenge (Battle-Scarred)",
    "price":"13.55",
    "sold":"444"
  },
  "2":{
    "name":"AK-47 | Aquamarine Revenge (Factory New)",
    "price":"38.96",
    "sold":"157"
  }
}

console.log(_.mapKeys(obj, (val) => val.name));

＆＃13;

Answer 2

喜欢这个？

x = x={"1":{"name":"AK-47 | Aquamarine Revenge (Battle-Scarred)","price":"13.55","sold":"444"},"2":{"name":"AK-47 | Aquamarine Revenge (Factory New)","price":"38.96","sold":"157"} }
_.reduce(x, (acc,o) => {acc[o.name] = o; return acc;}, {})

如果需要，您还可以删除＆＃34;名称＆＃34;从结果键中，还创建原始的副本而不是引用。

_.reduce(x, (acc,o) => {acc[o.name] = Object.assign({},o); delete acc[o.name].name; return acc;}, {})

Answer 3

为什么必须使用_.keyBy？使用_.each和_.omit怎么样？（_.omit假设您不再需要name键/值对）

var before = {"1":{"name":"AK-47 | Aquamarine Revenge (Battle-Scarred)","price":"13.55","sold":"444"},"2":{"name":"AK-47 | Aquamarine Revenge (Factory New)","price":"38.96","sold":"157"}};
var after = {};

_.each(before, function(b4) {
  after[b4.name] = _.omit(b4, 'name');
});

请参阅：https://repl.it/@dexygen/stackoverflowq48085676

Answer 4

这通过给出特定名称为您提供整个项目。

var jsonArray = [{name: "AK-47 | Aquamarine Revenge (Factory New)", price: "38.96", sold: "157"}, {name: "Glock-18 | Fade (Factory New)", price: "287,10", sold: "256"}];

function match(x) {
return x[this[0]]===this[1];
}

var nameToCheck = "AK-47 | Aquamarine Revenge (Factory New)"

var getObject = jsonArray.filter(match, ["name", nameToCheck]);

console.log(getObject);

如果您想要价格，只需：

var price = getObject[0].price;

如何使用lodash.keyBy更改集合中每个项目的标识符？

4 个答案: