Dottie helps you easily (and without sacrificing too much performance) look up and play with nested keys in objects, without them throwing up in your face.
Install
npm install dottie
Usage
For detailed usage, check source or tests.
Get value
Gets nested value, or undefined if unreachable, or a default value if passed.
var values = {
some: {
nested: {
key: 'foobar';
}
},
'some.dot.included': {
key: 'barfoo'
}
}
dottie.get(values, 'some.nested.key'); // returns 'foobar'
dottie.get(values, 'some.undefined.key'); // returns undefined
dottie.get(values, 'some.undefined.key', 'defaultval'); // returns 'defaultval'
dottie.get(values, ['some.dot.included', 'key']); // returns 'barfoo'
Note: lodash.get() also works fine for this
Set value
Sets nested value, creates nested structure if needed
dottie.set(values, 'some.nested.value', someValue);
dottie.set(values, ['some.dot.included', 'value'], someValue);
dottie.set(values, 'some.nested.object', someValue, {
force: true // force overwrite defined non-object keys into objects if needed
});
Transform object
Transform object from keys with dottie notation to nested objects
var values = {
'user.name': 'Gummy Bear',
'user.email': 'gummybear@candymountain.com',
'user.professional.title': 'King',
'user.professional.employer': 'Candy Mountain'
};
var transformed = dottie.transform(values);
/*
{
user: {
name: 'Gummy Bear',
email: 'gummybear@candymountain.com',
professional: {
title: 'King',
employer: 'Candy Mountain'
}
}
}
*/
With a custom delimiter
var values = {
'user_name': 'Mick Hansen',
'user_email': 'maker@mhansen.io'
};
var transformed = dottie.transform(values, { delimiter: '_' });
/*
{
user: {
name: 'Mick Hansen',
email: 'maker@mhansen.io'
}
}
*/
Get paths in object
var object = {
a: 1,
b: {
c: 2,
d: { e: 3 }
}
};
dottie.paths(object); // ["a", "b.c", "b.d.e"];
Performance
0.3.1 and up ships with dottie.memoizePath: true by default, if this causes any bugs, please try setting it to false