https://github.com/deraen/random-lodash-mixins

Some functions Lodash is missing but might be useful when using e.g. AngularJS + Socket.io
https://github.com/deraen/random-lodash-mixins

Last synced: 2 days ago
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Some functions Lodash is missing but might be useful when using e.g. AngularJS + Socket.io

• Host: GitHub
• URL: https://github.com/deraen/random-lodash-mixins
• Owner: Deraen
• License: mit
• Created: 2013-07-11T14:56:31.000Z (about 11 years ago)
• Default Branch: master
• Last Pushed: 2015-05-27T15:46:25.000Z (over 9 years ago)
• Last Synced: 2024-09-23T15:17:31.386Z (10 days ago)
• Language: JavaScript
• Homepage:
• Size: 234 KB
• Stars: 6
• Watchers: 3
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Random functions [![Build Status](https://travis-ci.org/Deraen/random-lodash-mixins.svg)](https://travis-ci.org/Deraen/random-lodash-mixins)

Some functions Lo-Dash is missing but I have found useful.

Documentation contains some usage examples.

In addition to simple examples there are some particulary

good use cases using AngularJS + Socket.io.

## Array manipulation

I removed these functions as Lo-Dash already provides [_.remove](http://lodash.com/docs#remove)

and append and prepend can be done with native JS and Lo-Dash.

Below are examples to use Array.unshift and push.

### prepend

```

var a = [1, 2];

var arrayRef = [];

var unshift = arrayRef.unshift;

// Single element

a.unshift(-1); // a = [-1, 1, 2];

// Callback

socket.on('users:new', _.bind(_.call, $scope.users.unshift, $scope.users)); // or

socket.on('users:new', _.bind(_.call, unshift, $scope.users));

// Multiple elements

unshift.apply(a, [-3, -2]); // a = [-3, -2, -1, 1, 2];

// Callback

socket.on('users:list', _.bind(_.apply, $scope.users.unshift, $scope.users)); // or

socket.on('users:list', _.bind(_.apply, unshift, $scope.users));

```

### append

```

var push = arrayRef.push;

// Use $scope.users.push / .push / etc.

```

## Object manipulation

### _.set(object, key, value)

Set property in target object to given value

```

var a = {a: 1, b: 2};

_.set(a, 'a', 3); // a = {a: 3, b: 2};

```

```

socket.on('state', function (data) {

  $scope.state = data;

});

// or

socket.on('state', _.partial(_.set, $scope, 'state'));

```

### _.get(object, key)

Alias for [_.result](http://lodash.com/docs#result).

### _.flattenObj(object[, separator])

Returns a new object.

Default separator is '.'

```

var a = {a: {b: {c: {d: 1}}}, e: {f: {g: 2}, c: 3}};

_.flattenObj(a); // => {'a.b.c.d': 1, 'e.f.g': 2, 'e.c': 3};

```

### _.unflattenObj(object[, separator])

Returns a new object.

Default separator is '.'

```

var a = {'a.b.c.d': 1, 'e.f.g': 2, 'e.c': 3};

_.unflattenObj(a); // => {a: {b: {c: {d: 1}}}, e: {f: {g: 2}, c: 3}}

```

## Misc

### _.construct(Constructor, value)

If value is defined use given constructor to create a new Object else return undefined.

```

new Date(undefined) // = Invalid Date

// or

_.construct(Date, undefined) // = undefined

```

### _.clean

Returns a deep copy of the object with empty or undefined properties removed.

```

var q = {user: user._id};

if (request.params.from) q.from = {$lt: new Date(request.params.from)};

// or

var q = _.clean({

  user: user._id,

  from: {$lt: _.construct(Date, request.params.from)} // request.params.from = undefined

}); // q = {user: 'foo'}

```

Though in this case the first in fact looks better...