基于键值javascript在多个数组中打破数组

Question

我有一个数组，我想根据一个键（K1 等键）值（A、AA 等值）将其拆分为多个数组。我的例子：

array = [{"K1":"A","K2":"B","k3":"AA"},{"K1":"A","K2":"B","k3":"BB"},{"K1":"A","K2":"B","k3":"BB"},{"K1":"A","K2":"B","k3":"CC"}]

应该返回其中值 AA、BB、CC 是用于分离的变量/值。该数组是动态的，因此 ik 也可以具有例如 DD、EE 等

array 1= [{"K1":"A","K2":"B","k3":"AA"}]
array 2= [{"K1":"A","K2":"B","k3":"BB"},{"K1":"A","K2":"B","k3":"BB"}]
array 3= [{"K1":"A","K2":"B","k3":"CC"}]

我如何实现这一目标

Answer 1

假设键在所有数组元素上的顺序相同，您可以使用reduce 创建一个对象。使用Object.values将对象转换为数组

var array = [{"K1":"A","K2":"B","k3":"AA"},{"K1":"A","K2":"B","k3":"BB"},{"K1":"A","K2":"B","k3":"BB"},{"K1":"A","K2":"B","k3":"CC"}];

[array1,array2,array3] = Object.values(array.reduce((c,v)=>{
	let k = Object.values(v).join("_"); //Using the values as key.
	c[ k ] = c[ k ] || [];
	c[ k ].push( v );
	return c;
},{}))
	
console.log( "array1", array1 );
console.log( "array2", array2 );
console.log( "array3", array3 );

Answer 2

仍然难以破译您实际尝试拆分的依据，但这里有一些通用代码可以帮助您编写/尝试内容。您可以尝试循环遍历数组并将对象推送到基于正常逻辑的新拆分数组，如下所示

// initial array
const array = [{"K1":"A","K2":"B","k3":"AA"},{"K1":"A","K2":"B","k3":"BB"},{"K1":"A","K2":"B","k3":"BB"},{"K1":"A","K2":"B","k3":"CC"}];

// split arrays
const array1 = [];
const array2 = [];
const array3 = [];

array.forEach(obj => {
  // if statements or switch statement depending on how you want to split
  switch(obj.k3) {
    case 'AA':
      array1.push(obj);
      break;
    case 'BB':
      array2.push(obj);
      break;
    case 'CC':
    default:
      array3.push(obj);
      break;
  }
});