JavaScript object array sort by string bug All In One

bug

// pure strings array, sort OK ✅
let arr = ["banana", "strawberry", "apple"];
JSON.stringify(arr.sort());
// '["apple","banana","strawberry"]'

// object array, using string key sort error ❌
let arr = [
  {
    "type": "fruit",
    "name": "banana"
  },
  {
    "type": "fruit",
    "name": "strawberry"
  },
  {
    "type": "fruit",
    "name": "apple"
  }
];

const sortName = (obj) => obj.name;

JSON.stringify(arr.sort((a, b) => sortName(a) - sortName(b) > 0 ? 1 : -1));
// '[{"type":"fruit","name":"apple"},{"type":"fruit","name":"strawberry"},{"type":"fruit","name":"banana"}]'
JSON.stringify(arr.sort(a => sortName(a)));
// '[{"type":"fruit","name":"apple"},{"type":"fruit","name":"strawberry"},{"type":"fruit","name":"banana"}]'

solutions

let arr = [
  {
    "type": "fruit",
    "name": "banana"
  },
  {
    "type": "fruit",
    "name": "strawberry"
  },
  {
    "type": "fruit",
    "name": "apple"
  }
];

const sortObjectArrayByStringKey = (arr = [], key = '') => {
  const sortKeys = arr.map(obj => obj[key]).sort();
  console.log(`sortKeys =`, JSON.stringify(sortKeys));
  let result = [];
  for(let sortKey of sortKeys) {
    result.push(arr.find(obj => obj[key] === sortKey))
  }
  console.log(`result =`, JSON.stringify(result));
  return result;
}

sortObjectArrayByStringKey(arr, 'name');
// sortKeys = ["apple","banana","strawberry"]
// result = [{"type":"fruit","name":"apple"},{"type":"fruit","name":"banana"},{"type":"fruit","name":"strawberry"}]

demos

let arr = ['ab', 'ac', 'cc'];
JSON.stringify(arr.sort());
// '["ab","ac","cc"]'

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标签：sort,arr,apple,string,object,fruit,type,name
From： https://www.cnblogs.com/xgqfrms/p/18195429