I have following object array:
var arr = [
{
id : "a1",
guid : "sdfsfd",
...
value : "abc",
status: "active"
},
{
id : "a2",
guid : "sdfsfd",
...
value : "def",
status: "inactive"
},
{
id : "a2",
guid : "sdfsfd",
...
value : "def"
},
...
]
How to set "status" property of each object to "active". So the resulting array will be:
var arr = [
{
id : "a1",
guid : "sdfsfd",
...
value : "abc",
status: "active"
},
{
id : "a2",
guid : "sdfsfd",
...
value : "def",
status: "active"
},
{
id : "a2",
guid : "sdfsfd",
...
value : "def",
status: "active"
},
...
]
Additionally this should create the property "active" if doesn't exists.
I can do this using for loops. But I'm pretty much sure lodash can do this in one line like:
arr = _.set_property(arr, "status", "active");
Indeed, you don't need Lodash, but the question is tagged Lodash, and using Lodash offers some useful defenses that reduces the risk of errors. This solution utilizes _.forEach and _.set
// _.forEach won't throw errors if arr is not an array...
_.forEach(arr, function (obj) {
// _.set won't throw errors if obj is not an object. With more complex objects, if a portion of the path doesn't exist, _.set creates it
_.set(obj, 'status', 'active');
});
If you wanted to make it abstract, you could build a Lodash mixin:
_.mixin({
setProperty: function(arr, key, val) {
_.forEach(arr, function (obj) {
_.set(obj, path, val);
});
}
});
Then, you could use it exactly as you described:
_.setProperty( arr, 'status', 'active' );