smart-table-operators

A basic set of functional operators (or higher order function) for nodejs and browsers. Used internally in smart-table but can be useful to anyone. However if you need something more elaborated you'll probably be more interested in Ramda or lodash

Installation

npm

npm install smart-table-operators --save

yarn

yarn add smart-table-operators

Usage

swap

Swap arguments, returning a new function.

import {swap} from 'smart-table-operators';

const substract = (a,b) => a-b;
const f = swap(substract);
substract(4,2);
// > 2
f(4,2);
// > -2

compose

compose function returning a new function.

import {compose} from 'smart-table-operators';

const addTwo = (a) => a + 2;
const multiplyByThree = (a) => a * 3;

const addTwoTimesThree = compose(addTow, multiplyByThree);

addTwoTimesThree(4);
// > 18

tap

call side effects, returning a new function (which returns the initial argument).

import {tap} from 'smart-table-operators';

const log = tap((a)=>console.log(a));
const four = log(4);
// > 4
console.log(four)
// > 4

curry

Takes a function and return a new function. If this new function is called whereas the argument length is not equal to the arity, returns a new function.

import {curry} from 'smart-table-operators'
const curriedAdd = curry((a,b) => a + b);

curriedAdd(2,3);
// > 5
const addTwo = curriedAdd(2);

addTow(3);
// > 5

You can specify the expected arity (useful when passing default value)

import {curry} from 'smart-table-operators';

const add = function (a, b=2){return a+b;};
const curriedAdd = curry(add,2);

const addThree = curriedAdd(3);
addThree();
// > 5

Contributing

test

npm test

or

yarn test

issues

Only bugs coming with a running example