A Dart port of classic extend() method from jQuery. It extend an existing Mutable Map with another source. It can be extended by multiple additional sources in a sequence.
Beware: the original Map will be modified and will be returned.
Example:
// Don't use `const` or `final`. It'll make the Map `Immutable`
var baseObj = {
'dummy': 'x',
'complex': {
'subKey': 'subValue',
'subComplex': {
'deepKey': 'deepValue',
},
'subUndefined': null
},
'baseUndefined': null
};
final result = baseObj.extend({
'complex': {
'subKey': 'subValueOther',
'subComplex': {'deepNewKey': 'deepNewValue'}
},
'newKey': 'newValue'
});
// beware, the original object is also changed
print(baseObj);
// Hence, you may discard using result
print(result);
// in case, if you have one Immutable Map or don't want to change the
// original Map, try to extend an empty Map
final result = {}.extend(baseObj, [
{
'complex': {
'subKey': 'subValueOther',
'subComplex': {'deepNewKey': 'deepNewValue'}
},
'newKey': 'newValue'
}
]);
print(result);Output:
{
"dummy": "x",
"complex": {
"subKey": "subValueOther", // 👈 is extended
"subComplex": {
"deepKey": "deepValue", // 👈 remains unchanged
"deepNewKey": "deepNewValue" // 👈 is added
},
"subUndefined": null
},
"baseUndefined": null,
"newKey": "newValue" // 👈 is added
}Please file feature requests and bugs at the issue tracker.