https://github.com/YuriGor/deepdash
eachDeep, filterDeep, findDeep, someDeep, omitDeep, pickDeep, keysDeep etc.. Tree traversal library written in Underscore/Lodash fashion
https://github.com/YuriGor/deepdash
eachdeep filterdeep foreachdeep keysdeep lodash object paths traversal tree
Last synced: 5 months ago
JSON representation
eachDeep, filterDeep, findDeep, someDeep, omitDeep, pickDeep, keysDeep etc.. Tree traversal library written in Underscore/Lodash fashion
- Host: GitHub
- URL: https://github.com/YuriGor/deepdash
- Owner: YuriGor
- License: mit
- Created: 2018-10-28T23:20:18.000Z (over 6 years ago)
- Default Branch: master
- Last Pushed: 2023-01-06T06:49:56.000Z (over 2 years ago)
- Last Synced: 2024-11-07T18:07:40.955Z (5 months ago)
- Topics: eachdeep, filterdeep, foreachdeep, keysdeep, lodash, object, paths, traversal, tree
- Language: JavaScript
- Homepage: https://deepdash.io/
- Size: 8.27 MB
- Stars: 275
- Watchers: 2
- Forks: 12
- Open Issues: 25
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- Contributing: CONTRIBUTING.md
- Funding: .github/FUNDING.yml
- License: LICENSE
Awesome Lists containing this project
- awesome-node-esm - deepdash - tree traversal library written in Underscore/Lodash fashion (Packages / Functional programming)
README
## Deepdash
eachDeep, filterDeep, findDeep, someDeep, omitDeep, pickDeep, keysDeep etc..
Tree traversal library written in Underscore/Lodash fashion.
Standalone or as a Lodash mixin extension
> Deepdash lib is used in [PlanZed.org](https://planzed.org/) - awesome cloud mind map app created by the author of deepdash.
Plz check it, it's free and I need [feedback](https://github.com/YuriGor/PlanZed.org) 😉
[](#contributors-)
[](https://snyk.io/test/npm/deepdash) [](https://travis-ci.org/YuriGor/deepdash) [](https://coveralls.io/github/YuriGor/deepdash?branch=master)
[](https://nodei.co/npm/deepdash/)
### Installation
#### In a browser
Load [script](https://cdn.jsdelivr.net/npm/deepdash/browser/deepdash.min.js) after Lodash, then pass a lodash instance to the deepdash function:
```html
deepdash(_);
console.log(_.eachDeep); // --> new methods mixed into Lodash
```
If you don't use Lodash - there is a standalone version:
```html
console.log(deepdash.eachDeep); // --> all the methods just work
```
Standalone Deepdash weighs more then "dry" version, because it includes some of cherry-picked Lodash methods it depends on.
But it's better to use Standalone version, than include full Lodash just as dependency, if you don't need Lodash.
#### Using npm:
```
npm i --save deepdash
```
In Node.js:
```js
// load Lodash if you need it
const _ = require('lodash');
//mixin all the methods into Lodash object
require('deepdash')(_);
// or cherry-pick method you only need and mix it into lodash
require('deepdash/addFilterDeep')(_);
// or cherry-pick method separately if you don't want to mutate Lodash instance
const filterDeep = require('deepdash/getFilterDeep')(_);
// If you don't need Lodash - there is standalone version
const deepdash = require('deepdash/standalone'); // full
const filterDeep = require('deepdash/filterDeep'); // or separate standalone methods
```
There is also deepdash as ES6 module
```
npm i --save deepdash-es
```
```js
import lodash from 'lodash-es';
import deepdash from 'deepdash-es';
const _ = deepdash(lodash);
```
in the ES package there are same cherry-pick and/or standalone methods as in the main package.
```js
import filterDeep from 'deepdash-es/filterDeep';
```
or
```js
import { filterDeep } from 'deepdash-es/standalone';
```
or
```js
import _ from 'lodash-es';
import getFilterDeep from 'deepdash-es/getFilterDeep';
const filterDeep = getFilterDeep(_);
```
or
```js
import _ from 'lodash-es';
import addFilterDeep from 'deepdash-es/addFilterDeep';
addFilterDeep(_);// --> _.filterDeep
```
## Demo
[Example react+redux app](https://codesandbox.io/s/github/YuriGor/deepdash-example-comments/) with nested comments filtered by Deepdash.([source is here](https://github.com/YuriGor/deepdash-example-comments/tree/master/))
## Methods
### eachDeep (forEachDeep)
› iterate over all the children and sub-children [📚 see docs](https://deepdash.io/#eachdeep-foreachdeep)
expand example
let children = [/* expand to see */];
```js
let children = [
{
description: 'description for node 1',
comment: 'comment for node 1',
note: 'note for node 1',
name: 'node 1',
bad: false,
children: [
{
description: 'description for node 1.1',
comment: 'comment for node 1.1',
note: 'note for node 1.1',
name: 'node 1.1',
bad: false,
},
{
description: 'description for node 1.2',
comment: 'comment for node 1.2',
note: 'note for node 1.2',
name: 'node 1.2',
good: true,
},
{
description: 'description for node 1.3',
comment: 'comment for node 1.3',
note: 'note for node 1.3',
name: 'node 1.3',
bad: true,
good: false,
},
],
},
{
description: 'description for node 2',
comment: 'comment for node 2',
note: 'note for node 2',
name: 'node 2',
good: true,
children: [
{
description: 'description for node 2.1',
comment: 'comment for node 2.1',
note: 'note for node 2.1',
name: 'node 2.1',
bad: false,
},
{
description: 'description for node 2.2',
comment: 'comment for node 2.2',
note: 'note for node 2.2',
name: 'node 2.2',
good: true,
},
{
description: 'description for node 2.3',
comment: 'comment for node 2.3',
note: 'note for node 2.3',
name: 'node 2.3',
bad: true,
good: false,
},
],
},
{
description: 'description for node 3',
comment: 'comment for node 3',
note: 'note for node 3',
name: 'node 3',
bad: true,
good: false,
children: [
{
description: 'description for node 3.1',
comment: 'comment for node 3.1',
note: 'note for node 3.1',
name: 'node 3.1',
bad: false,
},
{
description: 'description for node 3.2',
comment: 'comment for node 3.2',
note: 'note for node 3.2',
name: 'node 3.2',
good: true,
},
{
description: 'description for node 3.3',
comment: 'comment for node 3.3',
note: 'note for node 3.3',
name: 'node 3.3',
bad: true,
good: false,
},
],
},
];
```
```js
function displayField(val, key, parent, context) {
if (_.isArray(parent)) {
key = '[' + key + ']';
}
console.log(
_.repeat(' ', context.depth) +
'→ ' +
key +
': ' +
(_.isArray(val)
? '[' + val.length + ']'
: _.isObject(val)
? '{' + (val.name || '') + '}'
: val)
);
}
console.log('\n = Iterate over tree (each child object) = \n');
_.eachDeep(children, displayField, { childrenPath: 'children' });
console.log('\n = Iterate over object (each field) = \n');
_.eachDeep(children, displayField);
```
Console:
```
= Iterate over tree (each child object) =
→ [0]: {node 1}
→ [0]: {node 1.1}
→ [1]: {node 1.2}
→ [2]: {node 1.3}
→ [1]: {node 2}
→ [0]: {node 2.1}
→ [1]: {node 2.2}
→ [2]: {node 2.3}
→ [2]: {node 3}
→ [0]: {node 3.1}
→ [1]: {node 3.2}
→ [2]: {node 3.3}
= Iterate over object (each field) =
→ [0]: {node 1}
→ description: description for node 1
→ comment: comment for node 1
→ note: note for node 1
→ name: node 1
→ bad: false
→ children: [3]
→ [0]: {node 1.1}
→ description: description for node 1.1
→ comment: comment for node 1.1
→ note: note for node 1.1
→ name: node 1.1
→ bad: false
→ [1]: {node 1.2}
→ description: description for node 1.2
→ comment: comment for node 1.2
→ note: note for node 1.2
→ name: node 1.2
→ good: true
→ [2]: {node 1.3}
→ description: description for node 1.3
→ comment: comment for node 1.3
→ note: note for node 1.3
→ name: node 1.3
→ bad: true
→ good: false
→ [1]: {node 2}
→ description: description for node 2
→ comment: comment for node 2
→ note: note for node 2
→ name: node 2
→ good: true
→ children: [3]
→ [0]: {node 2.1}
→ description: description for node 2.1
→ comment: comment for node 2.1
→ note: note for node 2.1
→ name: node 2.1
→ bad: false
→ [1]: {node 2.2}
→ description: description for node 2.2
→ comment: comment for node 2.2
→ note: note for node 2.2
→ name: node 2.2
→ good: true
→ [2]: {node 2.3}
→ description: description for node 2.3
→ comment: comment for node 2.3
→ note: note for node 2.3
→ name: node 2.3
→ bad: true
→ good: false
→ [2]: {node 3}
→ description: description for node 3
→ comment: comment for node 3
→ note: note for node 3
→ name: node 3
→ bad: true
→ good: false
→ children: [3]
→ [0]: {node 3.1}
→ description: description for node 3.1
→ comment: comment for node 3.1
→ note: note for node 3.1
→ name: node 3.1
→ bad: false
→ [1]: {node 3.2}
→ description: description for node 3.2
→ comment: comment for node 3.2
→ note: note for node 3.2
→ name: node 3.2
→ good: true
→ [2]: {node 3.3}
→ description: description for node 3.3
→ comment: comment for node 3.3
→ note: note for node 3.3
→ name: node 3.3
→ bad: true
→ good: false
```
[Try it yourself ›››](https://codepen.io/yurigor/pen/BeBEqx?editors=0010)
### filterDeep
› deep filter object [📚 see docs](https://deepdash.io/#filterdeep)
expand example
let children = [/* expand to see */];
```js
let children = [
{
description: 'description for node 1',
comment: 'comment for node 1',
note: 'note for node 1',
name: 'node 1',
bad: false,
children: [
{
description: 'description for node 1.1',
comment: 'comment for node 1.1',
note: 'note for node 1.1',
name: 'node 1.1',
bad: false,
},
{
description: 'description for node 1.2',
comment: 'comment for node 1.2',
note: 'note for node 1.2',
name: 'node 1.2',
good: true,
},
{
description: 'description for node 1.3',
comment: 'comment for node 1.3',
note: 'note for node 1.3',
name: 'node 1.3',
bad: true,
good: false,
},
],
},
{
description: 'description for node 2',
comment: 'comment for node 2',
note: 'note for node 2',
name: 'node 2',
good: true,
children: [
{
description: 'description for node 2.1',
comment: 'comment for node 2.1',
note: 'note for node 2.1',
name: 'node 2.1',
bad: false,
},
{
description: 'description for node 2.2',
comment: 'comment for node 2.2',
note: 'note for node 2.2',
name: 'node 2.2',
good: true,
},
{
description: 'description for node 2.3',
comment: 'comment for node 2.3',
note: 'note for node 2.3',
name: 'node 2.3',
bad: true,
good: false,
},
],
},
{
description: 'description for node 3',
comment: 'comment for node 3',
note: 'note for node 3',
name: 'node 3',
bad: true,
good: false,
children: [
{
description: 'description for node 3.1',
comment: 'comment for node 3.1',
note: 'note for node 3.1',
name: 'node 3.1',
bad: false,
},
{
description: 'description for node 3.2',
comment: 'comment for node 3.2',
note: 'note for node 3.2',
name: 'node 3.2',
good: true,
},
{
description: 'description for node 3.3',
comment: 'comment for node 3.3',
note: 'note for node 3.3',
name: 'node 3.3',
bad: true,
good: false,
},
],
},
];
```
```js
console.log('\n = Filter tree (good children) = \n');
console.log(
_.filterDeep(children, 'good', { childrenPath: 'children' })
);
console.log('\n = Filter object (names of good children) = \n');
console.log(
_.filterDeep(children, (val, key, parent) => {
if (key == 'name' && parent.good) return true;
})
);
```
Console:
```
= Filter tree (good children) =
[
{
"description": "description for node 1",
"comment": "comment for node 1",
"note": "note for node 1",
"name": "node 1",
"bad": false,
"children": [
{
"description": "description for node 1.2",
"comment": "comment for node 1.2",
"note": "note for node 1.2",
"name": "node 1.2",
"good": true
}
]
},
{
"description": "description for node 2",
"comment": "comment for node 2",
"note": "note for node 2",
"name": "node 2",
"good": true,
"children": [
{
"description": "description for node 2.2",
"comment": "comment for node 2.2",
"note": "note for node 2.2",
"name": "node 2.2",
"good": true
}
]
},
{
"description": "description for node 3",
"comment": "comment for node 3",
"note": "note for node 3",
"name": "node 3",
"bad": true,
"good": false,
"children": [
{
"description": "description for node 3.2",
"comment": "comment for node 3.2",
"note": "note for node 3.2",
"name": "node 3.2",
"good": true
}
]
}
]
= Filter object (names of good children) =
[
{
"children": [
{
"name": "node 1.2"
}
]
},
{
"name": "node 2",
"children": [
{
"name": "node 2.2"
}
]
},
{
"children": [
{
"name": "node 3.2"
}
]
}
]
```
[Try it yourself ›››](https://codepen.io/yurigor/pen/eaOaQg?editors=0010)
### findDeep
› find first matching deep meta-value [📚 see docs](https://deepdash.io/#finddeep)
example a bit later
let children = [/* expand to see */];
```js
// next time
```
```js
// sorry
```
Console:
```
❤️
```
[Try it yourself (no yet) ›››](https://codepen.io/yurigor)
### findValueDeep
› find first matching deep value [📚 see docs](https://deepdash.io/#findvaluedeep)
example a bit later
let children = [/* expand to see */];
```js
// next time
```
```js
// sorry
```
Console:
```
❤️
```
[Try it yourself (no yet) ›››](https://codepen.io/yurigor)
### findPathDeep
› find the path of the first matching deep value [📚 see docs](https://deepdash.io/#findpathdeep)
example a bit later
let children = [/* expand to see */];
```js
// next time
```
```js
// sorry
```
Console:
```
❤️
```
[Try it yourself (no yet) ›››](https://codepen.io/yurigor)
### mapDeep
› get array of values processed by iteratee. [📚 see docs](https://deepdash.io/#mapdeep)
expand example
```js
let res = _.mapDeep(
{ hello: { from: { the: 'deep world', and: 'deepdash' } } },
(v) => v.toUpperCase(),
{ leavesOnly: true }
);
// res -> ['DEEP WORLD','DEEPDASH']
```
[Try it yourself (no yet) ›››](https://codepen.io/yurigor)
### mapValuesDeep
› get the object with same structure, but transformed values. [📚 see docs](https://deepdash.io/#mapvaluesdeep)
expand example
```js
let res = _.mapValuesDeep(
{ hello: { from: { the: 'deep world' } } },
(v) => v.toUpperCase(),
{ leavesOnly: true }
);
// res -> { hello: { from: { the: 'DEEP WORLD' } } }
```
[Try it yourself ›››](https://codepen.io/yurigor/pen/yWBzGV?editors=0010)
### mapKeysDeep
› get the object with same values, but transformed keys. [📚 see docs](https://deepdash.io/#mapkeysdeep)
expand example
```js
let res = _.mapKeysDeep(
{ hello: { from: { the: 'deep world' } } },
(v, k) => k.toUpperCase()
);
// res -> { HELLO: { FROM: { THE: 'deep world' } } }
```
[Try it yourself (no yet) ›››](https://codepen.io/yurigor/)
### reduceDeep
› like reduce, but deep [📚 see docs](https://deepdash.io/#reducedeep)
expand example
```js
let max = _.reduceDeep({ a: 2, b: 3, c: { d: 6, e: [1, 5, 8] } },
(acc, value, key, parent, ctx) => {
if (typeof value == 'number' && (typeof acc != 'number' || value > acc))
return value;
return undefined;
}
);
// max == 8
```
[Try it yourself ›››](https://codepen.io/yurigor/pen/ZNzmmR?editors=0010)
### someDeep
› returns true if some matching deep value found [📚 see docs](https://deepdash.io/#somedeep)
example a bit later
let children = [/* expand to see */];
```js
// next time
```
```js
// sorry
```
Console:
```
❤️
```
[Try it yourself (no yet) ›››](https://codepen.io/yurigor)
### pickDeep
› pick values by paths specified by endings or regexes [📚 see docs](https://deepdash.io/#pickdeep)
expand example
let children = [/* expand to see */];
```js
let children = [
{
description: 'description for node 1',
comment: 'comment for node 1',
note: 'note for node 1',
name: 'node 1',
bad: false,
children: [
{
description: 'description for node 1.1',
comment: 'comment for node 1.1',
note: 'note for node 1.1',
name: 'node 1.1',
bad: false,
},
{
description: 'description for node 1.2',
comment: 'comment for node 1.2',
note: 'note for node 1.2',
name: 'node 1.2',
good: true,
},
{
description: 'description for node 1.3',
comment: 'comment for node 1.3',
note: 'note for node 1.3',
name: 'node 1.3',
bad: true,
good: false,
},
],
},
{
description: 'description for node 2',
comment: 'comment for node 2',
note: 'note for node 2',
name: 'node 2',
good: true,
children: [
{
description: 'description for node 2.1',
comment: 'comment for node 2.1',
note: 'note for node 2.1',
name: 'node 2.1',
bad: false,
},
{
description: 'description for node 2.2',
comment: 'comment for node 2.2',
note: 'note for node 2.2',
name: 'node 2.2',
good: true,
},
{
description: 'description for node 2.3',
comment: 'comment for node 2.3',
note: 'note for node 2.3',
name: 'node 2.3',
bad: true,
good: false,
},
],
},
{
description: 'description for node 3',
comment: 'comment for node 3',
note: 'note for node 3',
name: 'node 3',
bad: true,
good: false,
children: [
{
description: 'description for node 3.1',
comment: 'comment for node 3.1',
note: 'note for node 3.1',
name: 'node 3.1',
bad: false,
},
{
description: 'description for node 3.2',
comment: 'comment for node 3.2',
note: 'note for node 3.2',
name: 'node 3.2',
good: true,
},
{
description: 'description for node 3.3',
comment: 'comment for node 3.3',
note: 'note for node 3.3',
name: 'node 3.3',
bad: true,
good: false,
},
],
},
];
```
```js
console.log('\n = Pick name and description only = \n');
console.log(
_.pickDeep(children, ['name', 'description'])
);
```
Console:
```
= Pick name and description only =
[
{
"description": "description for node 1",
"name": "node 1",
"children": [
{
"description": "description for node 1.1",
"name": "node 1.1"
},
{
"description": "description for node 1.2",
"name": "node 1.2"
},
{
"description": "description for node 1.3",
"name": "node 1.3"
}
]
},
{
"description": "description for node 2",
"name": "node 2",
"children": [
{
"description": "description for node 2.1",
"name": "node 2.1"
},
{
"description": "description for node 2.2",
"name": "node 2.2"
},
{
"description": "description for node 2.3",
"name": "node 2.3"
}
]
},
{
"description": "description for node 3",
"name": "node 3",
"children": [
{
"description": "description for node 3.1",
"name": "node 3.1"
},
{
"description": "description for node 3.2",
"name": "node 3.2"
},
{
"description": "description for node 3.3",
"name": "node 3.3"
}
]
}
]
```
[Try it yourself ›››](https://codepen.io/yurigor/pen/zQOVBR?editors=0010)
### omitDeep
› get object without paths specified by endings or regexes [📚 see docs](https://deepdash.io/#omitdeep)
expand example
let children = [/* expand to see */];
```js
let children = [
{
description: 'description for node 1',
comment: 'comment for node 1',
note: 'note for node 1',
name: 'node 1',
bad: false,
children: [
{
description: 'description for node 1.1',
comment: 'comment for node 1.1',
note: 'note for node 1.1',
name: 'node 1.1',
bad: false,
},
{
description: 'description for node 1.2',
comment: 'comment for node 1.2',
note: 'note for node 1.2',
name: 'node 1.2',
good: true,
},
{
description: 'description for node 1.3',
comment: 'comment for node 1.3',
note: 'note for node 1.3',
name: 'node 1.3',
bad: true,
good: false,
},
],
},
{
description: 'description for node 2',
comment: 'comment for node 2',
note: 'note for node 2',
name: 'node 2',
good: true,
children: [
{
description: 'description for node 2.1',
comment: 'comment for node 2.1',
note: 'note for node 2.1',
name: 'node 2.1',
bad: false,
},
{
description: 'description for node 2.2',
comment: 'comment for node 2.2',
note: 'note for node 2.2',
name: 'node 2.2',
good: true,
},
{
description: 'description for node 2.3',
comment: 'comment for node 2.3',
note: 'note for node 2.3',
name: 'node 2.3',
bad: true,
good: false,
},
],
},
{
description: 'description for node 3',
comment: 'comment for node 3',
note: 'note for node 3',
name: 'node 3',
bad: true,
good: false,
children: [
{
description: 'description for node 3.1',
comment: 'comment for node 3.1',
note: 'note for node 3.1',
name: 'node 3.1',
bad: false,
},
{
description: 'description for node 3.2',
comment: 'comment for node 3.2',
note: 'note for node 3.2',
name: 'node 3.2',
good: true,
},
{
description: 'description for node 3.3',
comment: 'comment for node 3.3',
note: 'note for node 3.3',
name: 'node 3.3',
bad: true,
good: false,
},
],
},
];
```
```js
console.log('\n = Omit paths not ending with "e" = \n');
console.log(
_.omitDeep(children, /[^e]$/i, { onMatch: { skipChildren: false } }),
);
```
Console:
```
= Omit paths not ending with "e" =
[
{
"note": "note for node 1",
"name": "node 1",
"children": [
{
"note": "note for node 1.1",
"name": "node 1.1"
},
{
"note": "note for node 1.2",
"name": "node 1.2"
},
{
"note": "note for node 1.3",
"name": "node 1.3"
}
]
},
{
"note": "note for node 2",
"name": "node 2",
"children": [
{
"note": "note for node 2.1",
"name": "node 2.1"
},
{
"note": "note for node 2.2",
"name": "node 2.2"
},
{
"note": "note for node 2.3",
"name": "node 2.3"
}
]
},
{
"note": "note for node 3",
"name": "node 3",
"children": [
{
"note": "note for node 3.1",
"name": "node 3.1"
},
{
"note": "note for node 3.2",
"name": "node 3.2"
},
{
"note": "note for node 3.3",
"name": "node 3.3"
}
]
}
]
```
[Try it yourself ›››](https://codepen.io/yurigor/pen/YbKoNM?editors=0010)
### index
› get an object with all the paths as keys and corresponding values [📚 see docs](https://deepdash.io/#index)
expand example
```js
let index = _.index(
{
a: {
b: {
c: [1, 2, 3],
'hello world': {},
},
},
},
{ leavesOnly: true }
);
console.log(index);
```
Console:
```
{ 'a.b.c[0]': 1,
'a.b.c[1]': 2,
'a.b.c[2]': 3,
'a.b["hello world"]': {} }
```
[Try it yourself ›››](https://codepen.io/yurigor/pen/rgBzdB?editors=0010)
### paths (keysDeep)
› get an array of paths [📚 see docs](https://deepdash.io/#paths-keysdeep)
expand example
```js
let paths = _.paths(
{
a: {
b: {
c: [1, 2, 3],
'hello world': {},
},
},
},
{ leavesOnly: false }
);
console.log(paths);
```
Console:
```
[ 'a',
'a.b',
'a.b.c',
'a.b.c[0]',
'a.b.c[1]',
'a.b.c[2]',
'a.b["hello world"]' ]
```
[Try it yourself ›››](https://codepen.io/yurigor/pen/mYbByL?editors=0010)
### condense
› condense sparse array [📚 see docs](https://deepdash.io/#condense)
expand example
```js
let arr = ['a', 'b', 'c', 'd', 'e'];
delete arr[1];
console.log(arr);
delete arr[3];
console.log(arr);
_.condense(arr);
console.log(arr);
```
Console:
```
[ 'a', <1 empty item>, 'c', 'd', 'e' ]
[ 'a', <1 empty item>, 'c', <1 empty item>, 'e' ]
[ 'a', 'c', 'e' ]
```
[Try it yourself ›››](https://codepen.io/yurigor/pen/oOKGXE?editors=0010)
### condenseDeep
› condense all the nested arrays [📚 see docs](https://deepdash.io/#condensedeep)
expand example
```js
let obj = { arr: ['a', 'b', { c: [1, , 2, , 3] }, 'd', 'e'] };
delete obj.arr[1];
delete obj.arr[3];
_.condenseDeep(obj);
console.log(obj);
```
Console:
```
{ arr: [ 'a', { c: [ 1, 2, 3 ] }, 'e' ] }
```
[Try it yourself ›››](https://codepen.io/yurigor/pen/mgNBOa?editors=0010)
### exists
› like a `_.has` but returns `false` for empty array slots [📚 see docs](https://deepdash.io/#exists)
expand example
```js
var obj = [, { a: [, 'b'] }];
console.log(_.exists(obj, 0)); // false
console.log(_.exists(obj, 1)); // true
console.log(_.exists(obj, '[1].a[0]')); // false
console.log(_.exists(obj, '[1].a[1]')); // true
```
[Try it yourself ›››](https://codepen.io/yurigor/pen/MRNOQB?editors=0010)
### pathToString
› convert an array to string path (opposite to _.toPath) [📚 see docs](https://deepdash.io/#pathtostring)
expand example
```js
console.log(_.pathToString(['a', 'b', 'c', 'defg', 0, '1', 2.3]
,'prefix1', 'prefix2', '[3]'));
// prefix1.prefix2[3].a.b.c.defg[0][1]["2.3"]
console.log(_.pathToString(['"', '"', '"']));
// ["\\""]["\\""]["\\""]
console.log(_.pathToString('it.s.a.string'));
// it.s.a.string
```
[Try it yourself ›››](https://codepen.io/yurigor/pen/joNXGv?editors=0010)
### See [full docs](https://deepdash.io) for details.
## Contributors ✨
Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/docs/en/emoji-key)):
Raz Sinay
💻 📓 🤔
Florent
🐛 📓
JoeSchr
🤔 📓
Matt Black
🤔
Lukas Siemon
🤔 📓 💻 📢 ⚠️
crapthings
🤔
Corrado Masciullo
🐛 🤔
Jed Richards
🚇
Kolja Zuelsdorf
🐛 📓 💡
Noval Agung Prayogo
💬
Nathan Tomsic
🤔
madflow
💬
Matthew Kirkley
🐛 🤔
Torma Gábor
🐛 🤔 📓
Andreas Richter
🐛 📓
James
🐛 💻 📖 📓
rxliuli
🐛 💻 📖
TeleMediaCC
🐛
Nicolas Coutin
💵 📓
barrct
🐛 📖
casamia918
🐛 💻 📖
ferreirix
🤔
John Camden
🐛
Joshua
💻 📖
This project follows the [all-contributors](https://github.com/all-contributors/all-contributors) specification. Contributions of any kind welcome!