I have one problem statement.
Implement a function propertyExists(obj, path) that takes in an object and a path (string) as arguments and returns ‘False’ if the property doesn’t exist on that object or is null, else returns the value of the property.
And here is solution.
function propertyExists(obj,path) {
// Write logic here
let result = obj.hasOwnProperty(path);
if(result)
{
return (obj.path);
}
else
{
return result;
}
}
Is this correct way of doing it?
Multiple issues: the first name of the function should represent what it is doing, Path as variable name is vague but propertyName as a variable is clear. what you should do is either:
function getValue(obj,propertyName) {
if(!obj) { // if object not exist
return null;
}
return obj[propertyName];
} function propertyExists(obj,propertyName) {
if(!obj) { // if object not exist
return false;
}
return obj.hasOwnProperty(propertyName);
}
object->obj,propertyname->path
function propertyExist(obj, path){
if (obj.hasOwnProperty(path)) return obj[path];
else return false;
};
Here, as far as I can understand, the objects could be nested also.
Let's take obj as {"a":{"b":"dadsa"}} and path as ab
Now, the the solution which you have posted will not work. Ideally, it should return dadsa, but it will return false.
Try the below code, it will work for nested objects also.
function propertyExists(obj,path) {
// Write logic here
var val=obj;
for(a of path){
val=val[a];
if(!val)
return false;
}
return val;
}