https://github.com/robertherber/find-and-replace-immutable

Exposes immutable findAndReplace and replaceAt functions on top of lodash/fp
https://github.com/robertherber/find-and-replace-immutable

immutable javascript node utility

Last synced: 3 months ago
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Exposes immutable findAndReplace and replaceAt functions on top of lodash/fp

• Host: GitHub
• URL: https://github.com/robertherber/find-and-replace-immutable
• Owner: robertherber
• Created: 2017-06-20T05:15:26.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2017-06-20T05:44:03.000Z (over 7 years ago)
• Last Synced: 2024-10-23T01:32:43.340Z (3 months ago)
• Topics: immutable, javascript, node, utility
• Language: JavaScript
• Size: 46.9 KB
• Stars: 8
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: readme.md

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README

        
# find-and-replace-immutable

Exposes two simple but essential helper immutable methods:

* replaceAt (index, objectOrMapFunction, array)

* findAndReplace (findPredicateFunction, objectOrMapFunction, array)

Uses [lodash/fp](https://github.com/lodash/lodash/wiki/FP-Guide) under the hood, which is great for it's immutability.

I always end up using this in my React projects - so I thought I'd share it! ;)

## Examples

Using *replaceAt*:

~~~~

import { replaceAt } from 'find-and-replace-immutable';

const initialArray = ["original"];

const newArray = replaceAt(0, "new value", initialArray);

// expect(newArray).toEqual(["new value"]);

// expect(initialArray).toEqual(["original"]);

~~~~

Using *findAndReplace* with mapping function:

~~~~

import { findAndReplace } from 'find-and-replace-immutable';

const initialArray = [1, 2, 3, 3, 4, 5];

const newArray = findAndReplace(

  e => e === 3,

  oldValue => 33 * oldValue,

  initialArray

);

// expect(newArray).toEqual([1, 2, 99, 3, 4, 5]);

~~~~