create a json from array of string using javascript-CodePudding

After scraping an html table I have stored my data in the variable:

var data = ["header1", "header2", "a1", "a2", "b1", "b2", "c1", "c2"];

I want to create a json file in the form:

var json = [
{
"header1":"a1", 
"header2":"a2"
},
{
"header1":"b1", 
"header2":"b2"
},
{
"header1":"c1", 
"header2":"c2"
}
];

I know that I need

var headers={};

and load it with

headers["header1"] and headers["header2"]

I also need

var jsonObj = [];

and push the array headers inside jsonObj:

jsonObj.push(headers);

Is it possible to create it?

CodePudding user response：

I'll make some assumptions, and then attempt to answer your question.

To me, it seems your table looks something like:

header1	header2
a1	a2
b1	b2
c1	c2

Simply starting with the array you already have, we can then just pick out two and two values at the time. See the code below

const COLUMN_COUNT = 2
const data = ["header1", "header2", "a1", "a2", "b1", "b2", "c1", "c2"]

// this removes the headers from the data-list, 
// and stores them in the headers variable
const headers = data.splice(0, COLUMN_COUNT)
const output = []

while(data.length > 0) {
  const row = {}
  const values = data.splice(0, COLUMN_COUNT)
  for(const [idx, value] of values.entries()) {
    const header = headers[idx]
    row[header] = value
  }
  output.push(row)
}

console.log(output)

CodePudding user response：

There is actually no relation between header and the values, but assuming the first two elements are always header1 and header2 and the next 1 pair will be the value of header1 and header2 respectively, this might do it

const data = ["header1", "header2", "a1", "a2", "b1", "b2", "c1", "c2"];
const res = [];
const h1 = data[0];
const h2 = data[1];
data.splice(0, 2);


for (let i = 0; i < data.length; i  ) {
    if (i % 2 != 0) {
        const payload = {};
        payload[h1] = data[i - 1];
        payload[h2] = data[i];
        res.push(payload);
    }
}

console.log(res)