deep copy using spread operator code example
Example 1: deep clone array in javascript
const numbers = [1, [2], [3, [4]], 5];
// Using JavaScript
JSON.parse(JSON.stringify(numbers));
// Using Lodash
_.cloneDeep(numbers);
Example 2: deep copy js
//recursive deep copy of object
function dup(o) {
// "string", number, boolean
if(typeof(o) != "object") {
return o;
}
// null
if(!o) {
return o; // null
}
var r = (o instanceof Array) ? [] : {};
for(var i in o) {
if(o.hasOwnProperty(i)) {
r[i] = dup(o[i]);
}
}
return r;
}