File: README.md

package info (click to toggle)
node-cache-base 0.8.4-2
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 168 kB
  • sloc: sh: 11; makefile: 6
file content (284 lines) | stat: -rw-r--r-- 6,917 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
# cache-base [![NPM version](https://img.shields.io/npm/v/cache-base.svg?style=flat)](https://www.npmjs.com/package/cache-base) [![NPM downloads](https://img.shields.io/npm/dm/cache-base.svg?style=flat)](https://npmjs.org/package/cache-base) [![Build Status](https://img.shields.io/travis/jonschlinkert/cache-base.svg?style=flat)](https://travis-ci.org/jonschlinkert/cache-base)

Basic object cache with `get`, `set`, `del`, and `has` methods for node.js/javascript projects.

## Install

Install with [npm](https://www.npmjs.com/):

```sh
$ npm install cache-base --save
```

## Usage

```js
var Cache = require('cache-base');

// instantiate
var app = new Cache();

// set values
app.set('a', 'b');
app.set('c.d', 'e');

// get values
app.get('a');
//=> 'b'
app.get('c');
//=> {d: 'e'}

console.log(app.cache);
//=> {a: 'b'}
```

**Inherit**

```js
var util = require('util');
var Cache = require('cache-base');

function MyApp() {
  Cache.call(this);
}
util.inherits(MyApp, Cache);

var app = new MyApp();
app.set('a', 'b');
app.get('a');
//=> 'b'
```

**Namespace**

Define a custom property for storing values.

```js
var Cache = require('cache-base').namespace('data');
var app = new Cache();
app.set('a', 'b');
console.log(app.data);
//=> {a: 'b'}
```

## API

### [namespace](index.js#L21)

Create a `Cache` constructor that when instantiated will store values on the given `prop`.

**Params**

* `prop` **{String}**: The property name to use for storing values.
* `returns` **{Function}**: Returns a custom `Cache` constructor

**Example**

```js
var Cache = require('cache-base').namespace('data');
var cache = new Cache();

cache.set('foo', 'bar');
//=> {data: {foo: 'bar'}}
```

### [Cache](index.js#L35)

Create a new `Cache`. Internally the `Cache` constructor is created using the `namespace` function, with `cache` defined as the storage object.

**Params**

* `cache` **{Object}**: Optionally pass an object to initialize with.

**Example**

```js
var app = new Cache();
```

### [.set](index.js#L76)

Assign `value` to `key`. Also emits `set` with the key and value.

**Params**

* `key` **{String}**
* `value` **{any}**
* `returns` **{Object}**: Returns the instance for chaining.

**Events**

* `emits`: `set` with `key` and `value` as arguments.

**Example**

```js
app.on('set', function(key, val) {
  // do something when `set` is emitted
});

app.set(key, value);

// also takes an object or array
app.set({name: 'Halle'});
app.set([{foo: 'bar'}, {baz: 'quux'}]);
console.log(app);
//=> {name: 'Halle', foo: 'bar', baz: 'quux'}
```

### [.union](index.js#L106)

Union `array` to `key`. Also emits `set` with the key and value.

**Params**

* `key` **{String}**
* `value` **{any}**
* `returns` **{Object}**: Returns the instance for chaining.

**Example**

```js
app.union('a.b', ['foo']);
app.union('a.b', ['bar']);
console.log(app.get('a'));
//=> {b: ['foo', 'bar']}
```

### [.get](index.js#L136)

Return the value of `key`. Dot notation may be used to get [nested property values][get-value].

**Params**

* `key` **{String}**: The name of the property to get. Dot-notation may be used.
* `returns` **{any}**: Returns the value of `key`

**Events**

* `emits`: `get` with `key` and `value` as arguments.

**Example**

```js
app.set('a.b.c', 'd');
app.get('a.b');
//=> {c: 'd'}

app.get(['a', 'b']);
//=> {c: 'd'}
```

### [.has](index.js#L163)

Return true if app has a stored value for `key`, false only if value is `undefined`.

**Params**

* `key` **{String}**
* `returns` **{Boolean}**

**Events**

* `emits`: `has` with `key` and true or false as arguments.

**Example**

```js
app.set('foo', 'bar');
app.has('foo');
//=> true
```

### [.del](index.js#L191)

Delete one or more properties from the instance.

**Params**

* `key` **{String|Array}**: Property name or array of property names.
* `returns` **{Object}**: Returns the instance for chaining.

**Events**

* `emits`: `del` with the `key` as the only argument.

**Example**

```js
app.del(); // delete all
// or
app.del('foo');
// or
app.del(['foo', 'bar']);
```

### [.clear](index.js#L210)

Reset the entire cache to an empty object.

**Example**

```js
app.clear();
```

### [.visit](index.js#L227)

Visit `method` over the properties in the given object, or map
visit over the object-elements in an array.

**Params**

* `method` **{String}**: The name of the `base` method to call.
* `val` **{Object|Array}**: The object or array to iterate over.
* `returns` **{Object}**: Returns the instance for chaining.

## Related projects

You might also be interested in these projects:

* [base-methods](https://www.npmjs.com/package/base-methods): base-methods is the foundation for creating modular, unit testable and highly pluggable node.js applications, starting… [more](https://www.npmjs.com/package/base-methods) | [homepage](https://github.com/jonschlinkert/base-methods)
* [get-value](https://www.npmjs.com/package/get-value): Use property paths (`a.b.c`) to get a nested value from an object. | [homepage](https://github.com/jonschlinkert/get-value)
* [has-value](https://www.npmjs.com/package/has-value): Returns true if a value exists, false if empty. Works with deeply nested values using… [more](https://www.npmjs.com/package/has-value) | [homepage](https://github.com/jonschlinkert/has-value)
* [option-cache](https://www.npmjs.com/package/option-cache): Simple API for managing options in JavaScript applications. | [homepage](https://github.com/jonschlinkert/option-cache)
* [set-value](https://www.npmjs.com/package/set-value): Create nested values and any intermediaries using dot notation (`'a.b.c'`) paths. | [homepage](https://github.com/jonschlinkert/set-value)
* [unset-value](https://www.npmjs.com/package/unset-value): Delete nested properties from an object using dot notation. | [homepage](https://github.com/jonschlinkert/unset-value)

## Contributing

This document was generated by [verb](https://github.com/verbose/verb), please don't edit directly. Any changes to the readme must be made in [.verb.md](.verb.md). See [Building Docs](#building-docs).

Pull requests and stars are always welcome. For bugs and feature requests, [please create an issue](https://github.com/jonschlinkert/cache-base/issues/new).

## Building docs

Generate readme and API documentation with [verb](https://github.com/verbose/verb):

```sh
$ npm install -g verb verb-readme-generator && verb
```

## Running tests

Install dev dependencies:

```sh
$ npm install -d && npm test
```

## Author

**Jon Schlinkert**

* [github/jonschlinkert](https://github.com/jonschlinkert)
* [twitter/jonschlinkert](http://twitter.com/jonschlinkert)

## License

Copyright © 2016, [Jon Schlinkert](https://github.com/jonschlinkert).
Released under the [MIT license](https://github.com/jonschlinkert/cache-base/blob/master/LICENSE).

***

_This file was generated by [verb](https://github.com/verbose/verb), v0.9.0, on May 30, 2016._