Add id to array of objects - Javascript
You could use Array#forEach for this. The second argument of the callback refers to the index of the element. So you can assign the ID as index + 1.
const source = [{
color: "red",
value: "#f00"
},
{
color: "green",
value: "#0f0"
},
{
color: "blue",
value: "#00f"
},
{
color: "cyan",
value: "#0ff"
},
{
color: "magenta",
value: "#f0f"
},
{
color: "yellow",
value: "#ff0"
},
{
color: "black",
value: "#000"
}
];
source.forEach((item, i) => {
item.id = i + 1;
});
console.log(source);You can use .forEach() to iterate over array elements and add id:
data.forEach((o, i) => o.id = i + 1);
Demo:
let data = [{
color: "red",
value: "#f00"
}, {
color: "green",
value: "#0f0"
}, {
color: "blue",
value: "#00f"
}, {
color: "cyan",
value: "#0ff"
}, {
color: "magenta",
value: "#f0f"
}, {
color: "yellow",
value: "#ff0"
}, {
color: "black",
value: "#000"
}];
data.forEach((o, i) => o.id = i + 1);
console.log(data);.as-console-wrapper { max-height: 100% !important; top: 0; }You can use the map() function to iterate over your array of objects.
n is each of your objects and you can set the id value inside the map.
Hope this helps :)
let arr = [{
color: "red",
value: "#f00"
},
{
color: "green",
value: "#0f0"
},
{
color: "blue",
value: "#00f"
},
{
color: "cyan",
value: "#0ff"
},
{
color: "magenta",
value: "#f0f"
},
{
color: "yellow",
value: "#ff0"
},
{
color: "black",
value: "#000"
}
]
let i = 0;
arr.map(n => {
n['id'] = i;
i++;
})
console.log(arr);