function Person(name, favouriteColour) {
this.Name = name;
this.FavouriteColour = favouriteColour;
}
var group = [];
group.push(new Person("Bob", "Green"));
group.push(new Person("Jane", "Red"));
group.push(new Person("Jack", "Blue"));
What could I do to get an array of Names from group?
group.??? -> ["Bob", "Jane", "Jack"]
In c#, the same as: group.ConvertAll<string>(m => m.Name)
I think you'll just have to loop over the array and get the names that way.
function getKeysArray(key, objArray) {
var result = [], l = objArray.length;
for (var i = 0; i < l; i++) {
result.push(objArray[i][key]);
}
return result;
}
alert(getKeysArray("Name", group));
You could also try a seperate library like LINQ to JavaScript which looks quite useful.
I'll offer the obvious one with straight javascript that works in all browsers:
var names = [];
for (var i = 0; i < group.length; i++) {
names.push(group[i].Name);
}
Or with jQuery (using it's .map utility method):
var names = $.map(group, function(item) {return(item.Name);});
Or, if you install a .map shim to make sure the .map Array method is available in all browsers:
var names = group.map(function(item) {return(item.Name);});
You could use .map, but it's not available in older browsers.
// names is group's Name properties
var names = group.map(function(value) { return value.Name; });
In JavaScript 1.6 and later:
group.map(function(p) { return p.Name; });
