Convert Array to Object for table Schema-CodePudding

What is the best way to convert:

["Foo", "Bar", "John"]

To:

{
Foo: { name: 'Foo', index: 0, type: 'String' },
Bar: { name: 'Bar', index: 1, type: 'String' },
John: { name: 'John', index: 2, type: 'String' },
}

I believe I need to utilize

array.map()

but am not sure how to structure my mapping function. Any insight would be helpful.

CodePudding user response：

You can the function Array.prototype.reduce as follow.

const source = ["Foo", "Bar", "John"],
  capitalize = string => string.charAt(0).toUpperCase()   string.slice(1),
  result = source.reduce((a, name, index) => ({...a, [name]: {name, index, type: capitalize(typeof name)}}), {});
  
console.log(result);

.as-console-wrapper { max-height: 100% !important; top: 0; }

CodePudding user response：

your json is not valid , so if you need the valid json like this

[{"name":"Foo","index":0,"type":"string"},{"name":"Foo","index":1,"type":"string"},{"name":"Foo","index":2,"type":"string"}]

you can use this code

i=0;
var newObj=[];
arr.forEach(element => {
  newObj.push( {name:element, index:i, type: typeof element});
    i  ;
});

UPDATE

for this

var jarr=["Foo", "Bar", "John"]

you can use this

i=0;
var newObj={};
jarr.forEach(element => {
 newObj[element]={name:element, index:i, type: typeof element};
i  
 });

result

{
  "Foo": {
    "name": "Foo",
    "index": 0,
    "type": "string"
  },
  "Bar": {
    "name": "Bar",
    "index": 1,
    "type": "string"
  },
  "John": {
    "name": "John",
    "index": 2,
    "type": "string"
  }
}

CodePudding user response：

I think you could do as follows

const array = ["Foo", "Bar", "John"];
Object.fromEntries(
   array
   .map((el, index) => {
     return [el, {name: el, index, type: el.constructor.name}]
   })
)

Here you can find an example snippet:

const array = ["Foo", "Bar", "John"];
const result = Object.fromEntries(
   array
   .map((el, index) => {
     return [el, {name: el, index, type: el.constructor.name}]
   })
);
console.log(result);