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lodash.flow
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The lodash.flow package is a utility library that allows you to create a function pipeline by composing multiple functions. It is part of the Lodash library, which is a popular utility library for JavaScript. The flow function takes multiple functions as arguments and returns a new function that, when invoked, passes its arguments through each of the original functions from left to right.
Function Composition
This feature allows you to compose multiple functions into a single function. In the example, the composedFunction applies the add, multiply, and subtract functions in sequence to the input value.
const _ = require('lodash.flow');
const add = (x) => x + 1;
const multiply = (x) => x * 2;
const subtract = (x) => x - 3;
const composedFunction = _.flow([add, multiply, subtract]);
console.log(composedFunction(5)); // Output: 9
Data Transformation
This feature is useful for transforming data through a series of functions. In the example, the transform function converts a string to uppercase, appends an exclamation mark, and then splits it into an array of words.
const _ = require('lodash.flow');
const toUpperCase = (str) => str.toUpperCase();
const appendExclamation = (str) => str + '!';
const splitWords = (str) => str.split(' ');
const transform = _.flow([toUpperCase, appendExclamation, splitWords]);
console.log(transform('hello world')); // Output: [ 'HELLO', 'WORLD!' ]
Ramda is a functional programming library for JavaScript that provides a wide range of utility functions, including function composition. It is similar to lodash.flow but offers a more comprehensive set of functional programming tools.
compose-function is a small utility library that provides a simple way to compose functions. It is similar to lodash.flow but is more lightweight and focused solely on function composition.
Redux is a state management library for JavaScript applications. While its primary purpose is not function composition, it provides a compose function that can be used to achieve similar functionality to lodash.flow.
The lodash method _.flow
exported as a Node.js module.
Using npm:
$ {sudo -H} npm i -g npm
$ npm i --save lodash.flow
In Node.js:
var flow = require('lodash.flow');
See the documentation or package source for more details.
FAQs
The lodash method `_.flow` exported as a module.
The npm package lodash.flow receives a total of 693,651 weekly downloads. As such, lodash.flow popularity was classified as popular.
We found that lodash.flow demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 3 open source maintainers collaborating on the project.
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