Array<Object> 根据 key 值进行排序 #tag: array, sort

sort.js

const arr = [
  {"name": "Kate", "age": 22},
  {"name": "Candy", "age": 21},
  {"name": "Petty", "age": 20}
];

arr.sort(compare('name'))      // {"name": "Candy", "age": 21}, {"name": "Kate", "age": 22}, {"name": "Petty", "age": 20}
arr.sort(compare('age'));      // {"name": "Petty", "age": 20}, {"name": "Candy", "age": 21}, {"name": "Kate", "age": 22}

function compare(key) {
  return function(obj1, obj2) {
    const value1 = obj1[key];
    const value2 = obj2[key];
    
    if (typeof value1 === 'number' && typeof value2 === 'number') {
      if (value1 > value2) {
      	return 1;
      } else if (value1 < value2) {
        return -1;
      } else {
      	return 0;
      }
    } else if (typeof value1 === 'string' && typeof value2 === 'string') {
      return value1.localeCompare(value2);
    } else {
      throw Error('Compare value must be number or string.');
    }
  }
}