var arr = [
{
"Name": "chevrolet chevelle malibu",
"Cylinders": 8,
"Displacement": 307,
"Horsepower": 130,
"Weight_in_lbs": 3504,
"Origin": "USA"
},
{
"Name": "buick skylark 320",
"Miles_per_Gallon": 15,
"Cylinders": 8,
"Displacement": 350,
"Horsepower": 165,
"Weight_in_lbs": 3693,
"Acceleration": 11.5,
"Year": "1970-01-01",
},
{
"Miles_per_Gallon": 18,
"Cylinders": 8,
"Displacement": 318,
"Horsepower": 150,
"Weight_in_lbs": 3436,
"Year": "1970-01-01",
"Origin": "USA"
},
{
"Name": "amc rebel sst",
"Miles_per_Gallon": 16,
"Cylinders": 8,
"Displacement": 304,
"Horsepower": 150,
"Year": "1970-01-01",
"Origin": "USA"
},
]
names = Object
.entries(
arr.reduce(
(prev, next) => {
return { ...prev, ...next };
}
))
.map(entry => entry[0]);
str = "";
str += "" +
names
.map(name => `| ${name} | `)
.join('') +
"
";
str +=
arr
.map(obj =>
`${
names
.map(name => `| ${obj[name] || "-"} | `)
.join('')
}
`)
.join('');
str += "
";
document.write(str)