<!DOCTYPE html>
<
html
lang
=
"en"
>
<
head
>
<
meta
charset
=
"UTF-8"
>
<
meta
name
=
"viewport"
content="
width
=
device
-width,
initial-scale
=
1
.0">
<
title
>Document</
title
>
</
head
>
<
style
>
</
style
>
<
body
>
<
script
type
=
"text/javascript"
</
script
>
<
script
>
// Forming the array of objects
let array=[
{val:"val10", data:"data11"},
{val:"val20", data:"data22"},
{val:"val30", data:"data33"},
{val:"val30", data:"data33"},
{val:"val30", data:"data33"},
{val:"val50", data:"data33"},
{val:"val40", data:"data44"}
]
let data= d3.nest()
.key(function(d) { return d.val; })
.entries(array)
console.log("Type is: ", typeof array)
console.log(data);
</
script
>
</
body
>
</
html
>