如何将对象转换为数组？

Question

I have an object which is dynamically built. I need to get some of the fields of this object (exactly the dynamic ones) and parse them into an array.

In the code below, I need to transform the towers[X] into an array of objects.

{id: "", description: "Teste", towers[1]: true, towers[2]: true, 
    towers[3]: true, …}
    description: "Test"
    id: ""
    towers[1]: true
    towers[2]: true
    towers[3]: true
    towers[4]: ""
}

I want it to be something like:

{
    id: ""
    description: "Test",
    towers[1]: true //Don't care if it stays here or not, will not use
    ...
}

And a new array like:

{
    [id: 1, value: true],
    [id: 2, value: true],
    [id: 3, value: true],
    [id: 4, value: ""]
}

Answer 1

Just going to guess towers[0] gives back a number, if it does you can do this. This will find all keys that have boolean values and keep them and append them to a object.

const obj = YOUROBJHERE;
Object.keys(obj ).filter((key) => tyepof obj[key] === "boolean").reduce((accum, key) => {
    return {...accum, [key]: obj[key]};
}, {})

Answer 2

in case of X=number and obj is the object we want to transform

let result = [];
for (let indx = 1; indx <=x ; i++) {
result.push({value:indx,value: obj['towers'+indx]})
}

Answer 3

If you want to transform your array of object you can do some like:

   this.obj=this.obj.map(obj=>{
      return {
      id:obj.id,
      description:obj.description,
      towers:Object.keys(obj).filter((key) => key.indexOf('towers') != -1 )
          .map((k,index)=>{
              return {id:index+1,value:obj[k]}
          })
          .filter((x:any)=>x.value)
       }
    })

See that, map allow an "index" (begins by 0)