Rambda

Faster alternative to Ramda in just 10kB - Documentation

Rambda's advantages

• Tree-shaking

Currenly Rambda is more tree-shakable than Ramda as you can see in this tree-shaking example.

• Speed

Rambda is generally more performant than Ramda as the benchmarks can prove that.

You can clone this repo and run yarn run benchmark all to see for yourself.

• dot notation for R.path

Standard usage of R.path is R.path(['a', 'b'], {a: {b: 1} }).

In Rambda you have the choice to use the more readable dot notation:

R.path('a.b', {a: {b: 1} })

• comma notation for R.pick and R.omit

Similar to dot notation, but the separator is comma(,) instead of dot(.).

R.pick('a,b', {a: 1 , b: 2, c: 3} })

• Typescript included

Typescript definitions are included in the library, in comparison to Ramda, where you need to additionally install @types/ramda.

Rambda partially shadows Ramda's API, which means that you need to check Rambda's documentation to assure that all the methods you need are available.

Example use

const R = require('rambda')
const result = R.compose(
  R.filter( R.equals( 2 ) ),
  R.map( R.add( 1 ) )
)({ a: 1, b: 2, c: 3 })
console.log(result) // => '{a: 2}'

Install

• Use yarn add rambda for Webpack and Node.js usage

• For UMD usage either use ./dist/rambda.umd.js or the CDN link at

https://cdnjs.cloudflare.com/ajax/libs/rambda/1.0.11/webVersion.js

Differences between Rambda and Ramda

• Rambda's type detect async functions and unresolved Promises. The returned values are 'Async' and 'Promise'.

• Rambda's equals doesn't protect against circular structures as Ramda.equals does.

• Rambda's map and filter pass object key as second argument when mapping over objects.

• Rambda's path accepts dot notation, i.e. 'x.y' same as ['x','y']

• Rambda's pick and omit accept comma notation, i.e. 'x,y' same as ['x','y']

• Rambda's flip works only for functions expecting two arguments.

• Rambda's partialCurry and includes are not part of Ramda API.

• Rambda's startsWith/endsWith work only with strings, instead with array and strings.

If you need more Ramda methods in Rambda, you may either submit a PR or check the extended version of Rambda - Rambdax

API

add

add(a: number, b: number): number

R.add(2, 3) // =>  5

Source

Try in REPL

addIndex

addIndex(fn: Function): Function

const mapWithIndex = R.addIndex(R.map)
const result = mapWithIndex(
  (val, index) => `${val} - ${index}`,
  ['A', 'B', 'C']
) // => ['A - 0', 'B - 1', 'C - 2']

adjust

adjust(replaceFn: Function, i: number, arr: T[]): T[]

It replaces i index in arr with the result of replaceFn(arr[i]).

R.adjust(
  a => a + 1,
  0,
  [0, 100]
) // => [1, 100]

Source

Try in REPL

all

all(fn: Function, arr: T[]): boolean

It returns true, if all members of array arr returns true, when applied as argument to function fn.

const arr = [ 0, 1, 2, 3, 4 ]
const fn = x => x > -1

const result = R.all(fn, arr)
// => true

Source

Try in REPL

allPass

allPass(rules: Function[], input: any): boolean

It returns true, if all functions of rules return true, when input is their argument.

const input = {
  a : 1,
  b : 2,
}
const rules = [
  x => x.a === 1,
  x => x.b === 2,
]
const result = R.allPass(rules, input) // => true

Source

Try in REPL

always

always(x: any): Function

It returns function that always returns x.

const fn = R.always(7)

console.log(fn())// => 7

any

any(condition: Function, arr: T[]): boolean

It returns true, if at least one member of arr returns true, when passed to the condition function.

R.any(a => a * a > 8)([1, 2, 3])
// => true

Source

Try in REPL

anyPass

anyPass(conditions: Function[]): Function

const isBig = a => a > 20
const isOdd = a => a % 2 === 1

const result = R.anyPass(
  [isBig, isOdd]
)(11)
// => true

Source

Try in REPL

append

append(valueToAppend: T, arr: T[]): T[]

R.append(
  'foo',
  ['bar', 'baz']
) // => ['bar', 'baz', 'foo']

Source

Try in REPL

both

both(firstCondition: Function, secondCondition: Function, input: any): boolean

It returns true, if both function firstCondition and function secondCondition return true, when input is their argument.

const fn = R.both(
  a => a > 10,
  a => a < 20
)
console.log(fn(15)) //=> true
console.log(fn(30)) //=> false

compose

compose(fn1: Function, ... , fnN: Function): any

It performs right-to-left function composition.

const result = R.compose(
  R.map(x => x * 2),
  R.filter(x => x > 2)
)([1, 2, 3, 4])

// => [6, 8]

Source

Try in REPL

complement

complement(fn: Function): Function

It returns complemented function that accept input as argument.

The return value of complemented is the negative boolean value of fn(input).

const fn = R.complement(x => !x)

const result = fn(false) // => false

Source

Try in REPL

concat

concat(x: T[]|string, y: T[]|string): T[]|string

It returns a new string or array, which is the result of merging x and y.

R.concat([1, 2])([3, 4]) // => [1, 2, 3, 4]
R.concat('foo')('bar') // => 'foobar'

contains

contains(valueToFind: T, arr: T[]): boolean

It returns true, if valueToFind is part of arr.

R.contains(2, [1, 2]) // => true
R.contains(3, [1, 2]) // => false

Source

Try in REPL

curry

curry(fn: Function): Function

It returns curried version of fn.

const addFourNumbers = (a, b, c, d) => a + b + c + d
const curriedAddFourNumbers = R.curry(addFourNumbers)
const f = curriedAddFourNumbers(1, 2)
const g = f(3)
const result = g(4) // => 10

Source

Try in REPL

dec

dec(x: number): number

It decrements a number.

R.dec(2) // => 1

defaultTo

defaultTo(defaultValue: T, inputArgument: any): T

It returns defaultValue, if inputArgument is undefined, null or NaN.

It returns inputArgument in any other case.

R.defaultTo('foo', undefined) // => 'foo'
R.defaultTo('foo', 'bar') // => 'bar'

Source

Try in REPL

dissoc

dissoc(prop: any, obj: object): object

It returns a new object that does not contain a prop property.

R.dissoc('b', {a: 1, b: 2, c: 3})
//=> {a: 1, c: 3}

Source

Try in REPL

divide

R.divide(71, 100) // => 0.71

drop

drop(howManyToDrop: number, arrOrStr: T[]|string): T[]|String

It returns arrOrStr with howManyToDrop items dropped from the left.

R.drop(1, ['foo', 'bar', 'baz']) // => ['bar', 'baz']
R.drop(1, 'foo')  // => 'oo'

Source

Try in REPL

dropLast

dropLast(howManyToDrop: number, arrOrStr: T[]|String): T[]|String

It returns arrOrStr with howManyToDrop items dropped from the right.

R.dropLast(1, ['foo', 'bar', 'baz']) // => ['foo', 'bar']
R.dropLast(1, 'foo')  // => 'fo'

Source

Try in REPL

endsWith

endsWith(x: string, str: string): boolean

R.endsWith(
  'bar',
  'foo-bar'
) // => true

R.endsWith(
  'foo',
  'foo-bar'
) // => false

Source

Try in REPL

either

endsWith(firstCondition: Function, secondCondition: Function): Function

R.either(
  a => a > 10,
  a => a % 2 === 0
)(15) //=> true

Source

Try in REPL

equals

equals(a: any, b: any): boolean

It returns equality match between a and b.

It doesn't handle cyclical data structures.

R.equals(
  [1, {a:2}, [{b:3}]],
  [1, {a:2}, [{b:3}]]
) // => true

Source

Try in REPL

F

R.F() // => false

filter

filter(filterFn: Function, x: Array|Object): Array|Object

It filters x iterable over boolean returning filterFn.

const filterFn = a => a % 2 === 0

const result = R.filter(filterFn, [1, 2, 3, 4])
// => [2, 4]

The method works with objects as well.

Note that unlike Ramda's filter, here object keys are passed as second argument to filterFn.

const result = R.filter((val, prop)=>{
  return prop === 'a' || val === 2
}, {a: 1, b: 2, c: 3})

// => {a: 1, b: 2}

Source

Try in REPL

find

find(findFn: Function, arr: T[]): T|undefined

It returns undefined or the first element of arr satisfying findFn.

const findFn = a => R.type(a.foo) === 'Number'
const arr = [{foo: 'bar'}, {foo: 1}]

const result = R.find(findFn, arr) 
// => {foo: 1}

Source

Try in REPL

findIndex

findIndex(findFn: Function, arr: T[]): number

It returns -1 or the index of the first element of arr satisfying findFn.

const findFn = a => R.type(a.foo) === 'Number'
const arr = [{foo: 'bar'}, {foo: 1}]

const result = R.findIndex(findFn, arr)
// => 1

Source

Try in REPL

flatten

flatten(arr: any[]): any[]

R.flatten([ 1, [ 2, [ 3 ] ] ])
// => [ 1, 2, 3 ]

Source

Try in REPL

flip

flip(fn: Function): Function

It returns function which calls fn with exchanged first and second argument.

const subtractFlip = R.flip(R.subtract)

const result = subtractFlip(1,7)
// => 6

Source

Try in REPL

forEach

forEach(fn: Function, arr: Array): Array

It applies function fn over all members of array arr and returns arr.

const sideEffect = {}
const result = R.forEach(
  x => sideEffect[`foo${x}`] = x
)([1, 2])

console.log(sideEffect) //=> {foo1 : 1, foo2 : 2}
console.log(result) //=> [1, 2]

Note, that unlike Ramda's forEach, Rambda's one doesn't dispatch to forEach method of arr if arr has such method.

Source

Try in REPL

has

has(prop: string, obj: Object): boolean

• It returns true if obj has property prop.

R.has('a', {a: 1}) // => true
R.has('b', {a: 1}) // => false

Source

Try in REPL

head

head(arrOrStr: T[]|string): T|string

It returns the first element of arrOrStr.

R.head([1, 2, 3]) // => 1
R.head('foo') // => 'f'

Source

Try in REPL

identity

identity(x: T): T

It just passes back the supplied arguments.

R.identity(7) // => 7

ifElse

ifElse(condition: Function|boolean, ifFn: Function, elseFn: Function): Function

It returns function, which expect input as argument and returns finalResult.

When this function is called, a value answer is generated as a result of condition(input).

If answer is true, then finalResult is equal to ifFn(input). If answer is false, then finalResult is equal to elseFn(input).

const fn = R.ifElse(
 x => x > 10,
 x => x*2,
 x => x*10
)

const result = fn(8)
// => 80

Source

Try in REPL

inc

inc(x: number): number

It increments a number.

R.inc(1) // => 2

includes

includes(x: any, arrOrStr: T[]|string): boolean

R.includes(1, [1, 2]) // => true
R.includes('oo', 'foo') // => true
R.includes('z', 'foo') // => false

!! Note that this method is not part of Ramda API.

Source

Try in REPL

indexOf

indexOf(valueToFind: any, arr: T[]): number

It returns -1 or the index of the first element of arr equal of valueToFind.

R.indexOf(1, [1, 2]) // => 0
R.indexOf(0, [1, 2]) // => -1

Source

Try in REPL

init

init(arrOrStr: T[]|string): T[]|string

• It returns all but the last element of arrOrStr.

R.init([1, 2, 3])  // => [1, 2]
R.init('foo')  // => 'fo'

Source

Try in REPL

join

join(separator: string, arr: T[]): string

R.join('-', [1, 2, 3])  // => '1-2-3'

Source

Try in REPL

is

is(xPrototype: any, x: any): boolean

It returns true is x is instance of xPrototype.

R.is(String, 'foo')  // => true
R.is(Array, 1)  // => false

Source

Try in REPL

isNil

isNil(x: any): boolean

It returns true is x is either null or undefined.

R.isNil(null)  // => true
R.isNil(1)  // => false

Source

Try in REPL

last

last(arrOrStr: T[]|string): T|string

• It returns the last element of arrOrStr.

R.last(['foo', 'bar', 'baz']) // => 'baz'
R.last('foo') // => 'o'

Source

Try in REPL

lastIndexOf

lastIndexOf(x: any, arr: T[]): number

It returns the last index of x in array arr.

R.equals is used to determine equality between x and members of arr.

Value -1 is returned if no x is found in arr.

R.lastIndexOf(1, [1, 2, 3, 1, 2]) // => 3
R.lastIndexOf(10, [1, 2, 3, 1, 2]) // => -1

Source

Try in REPL

length

length(arrOrStr: Array|String): Number

R.length([1, 2, 3]) // => 3

map

map(mapFn: Function, x: Array|Object): Array|Object

It returns the result of looping through iterable x with mapFn.

The method works with objects as well.

Note that unlike Ramda's map, here object keys are passed as second argument to mapFn.

const mapFn = x => x * 2
const resultWithArray = R.map(mapFn, [1, 2, 3])
// => [2, 4, 6]

const result = R.map((val, prop)=>{
  return `${val}-${prop}`
}, {a: 1, b: 2})
// => {a: 'a-1', b: 'b-2'}

Source

Try in REPL

match

match(regExpression: Regex, str: string): string[]

R.match(/([a-z]a)/g, 'bananas') // => ['ba', 'na', 'na']

Source

Try in REPL

merge

merge(a: Object, b: Object)

It returns result of Object.assign({}, a, b).

R.merge({ 'foo': 0, 'bar': 1 }, { 'foo': 7 })
// => { 'foo': 7, 'bar': 1 }

Source

Try in REPL

modulo

modulo(a: number, b: number):numberNumber

It returns the remainder of operation a/b.

R.module(14, 3) // => 2

multiply

multiply(a: number, b: number): number

It returns the result of operation a*b.

R.multiply(4, 3) // => 12

not

not(x: any): boolean

It returns inverted boolean version of input x.

R.not(true) //=> false
R.not(false) //=> true
R.not(0) //=> true
R.not(1) //=> false

omit

omit(propsToOmit: string[]|string, obj: Object): Object

It returns a partial copy of an obj with omitting propsToOmit

R.omit('a,c,d', {a: 1, b: 2, c: 3}) // => {b: 2}

Source

Try in REPL

path

path(pathToSearch: string[]|string, obj: Object): any

If pathToSearch is 'a.b' then it will return 1 if obj is {a:{b:1}}.

It will return undefined, if such path is not found.

R.path('a.b', {a: {b: 1}}) // => 1

Source

Try in REPL

pathOr

pathOr(defaultValue: any, pathToSearch: string[]|string, obj: Object): any

pathFound is the result of calling R.path(pathToSearch, obj).

If pathFound is undefined, null or NaN, then defaultValue will be returned.

pathFound is returned in any other case.

R.pathOr(1, 'a.b', {a: {b: 2}}) // => 2
R.pathOr(1, ['a', 'b'], {a: {b: 2}}) // => 2
R.pathOr(1, ['a', 'c'], {a: {b: 2}}) // => 1

Source

Try in REPL

partialCurry

partialCurry(fn: Function|Async, a: Object, b: Object): Function|Promise

When called with function fn and first set of input a, it will return a function.

This function will wait to be called with second set of input b and it will invoke fn with the merged object of a over b.

fn can be asynchronous function. In that case a Promise holding the result of fn is returned.

See the example below:

const fn = ({a, b, c}) => {
  return (a * b) + c
}
const curried = R.partialCurry(fn, {a: 2})
const result = curried({b: 3, c: 10})
// => 16

• Note that partialCurry is method specific for Rambda and the method is not part of Ramda's API

• You can read my argumentation for creating partialCurry here

Source

Try in REPL

pick

pick(propsToPick: string[], obj: Object): Object

It returns a partial copy of an obj containing only propsToPick properties.

R.pick(['a', 'c'], {a: 1, b: 2}) // => {a: 1}

Source

Try in REPL

pipe

pipe(fn1: Function, ... , fnN: Function): any

It performs left-to-right function composition.

const result = R.pipe(
  R.filter(val => val > 2),
  R.map(a => a * 2)
)([1, 2, 3, 4])

// => [6, 8]

Source

Try in REPL

pluck

pluck(property: string, arr: Object[]): any[]

It returns list of the values of property taken from the objects in array of objects arr.

R.pluck('a')([{a: 1}, {a: 2}, {b: 3}]) // => [1, 2]

Source

Try in REPL

prepend

prepend(x: T, arr: T[]): T[]

It adds x to the start of the array arr.

R.prepend('foo', ['bar', 'baz']) // => ['foo', 'bar', 'baz']

Source

Try in REPL

prop

prop(propToFind: string, obj: Object): any

It returns undefined or the value of property propToFind in obj

R.prop('x', {x: 100}) // => 100
R.prop('x', {a: 1}) // => undefined

Source

Try in REPL

propEq

propEq(propToFind: string, valueToMatch: any, obj: Object): boolean

It returns true if obj has property propToFind and its value is equal to valueToMatch.

const propToFind = 'foo'
const valueToMatch = 0

const result = R.propEq(propToFind, valueToMatch)({foo: 0})
// => true

Source

Try in REPL

range

range(start: number, end: number): number[]

It returns a array of numbers from start(inclusive) to end(exclusive).

R.range(0, 3)   // => [0, 1, 2]

Source

Try in REPL

reduce

reduce(iteratorFn: Function, accumulator: any, array: T[]): any

const iteratorFn = (acc, val) => acc + val
const result = R.reduce(iteratorFn, 1, [1, 2, 3])
// => 7

Source

Try in REPL

reject

reject(fn: Function, arr: T[]): T[]

It has the opposite effect of R.filter.

It will return those members of arr that return false when applied to function fn.

const fn = x => x % 2 === 1

const result = R.reject(fn, [1, 2, 3, 4]) 
// => [2, 4]

Source

Try in REPL

repeat

repeat(valueToRepeat: T, num: number): T[]

R.repeat('foo', 2) // => ['foo', 'foo']

Source

Try in REPL

replace

replace(strOrRegex: string|Regex, replacer: string, str: string): string

It replaces strOrRegex found in str with replacer.

R.replace('foo', 'bar', 'foo foo') // => 'bar foo'
R.replace(/foo/, 'bar', 'foo foo') // => 'bar foo'
R.replace(/foo/g, 'bar', 'foo foo') // => 'bar bar'

Source

Try in REPL

reverse

reverse(str: T[]): T[]

const arr = [1, 2]

const result = R.reverse(arr)
// => [2, 1]

Source

Try in REPL

sort

takeLast(num: number, arrOrStr: T[]|string): T[]|String

It returns copy of arr sorted by sortFn.

Note that sortFn must return a number type.

const sortFn = (a, b) => a - b

const result = R.sort(sortFn, [3, 1, 2]) 
// => [1, 2, 3]

Source

Try in REPL

sortBy

sortBy(sortFn: Function, arr: T[]): T[]

It returns copy of arr sorted by sortFn.

sortFn must return value for comparison

const sortFn = obj => obj.foo

const result = R.sortBy(sortFn, [
  {foo: 1},
  {foo: 0}
])

const expectedResult = [ {foo: 0}, {foo: 1} ]
console.log(result === expectedResult) // => true

Source

Try in REPL

split

split(separator: string, str: string): string[]

R.split('-', 'a-b-c') // => ['a', 'b', 'c']

Source

Try in REPL

splitEvery

splitEvery(sliceLength: number, arrOrString: T[]|string): T[T[]]|string[]

• It splits arrOrStr into slices of sliceLength.

R.splitEvery(2, [1, 2, 3]) // => [[1, 2], [3]]
R.splitEvery(3, 'foobar') // => ['foo', 'bar']

Source

Try in REPL

startsWith

startsWith(x: string, str: string): boolean

R.startsWith(
  'foo',
  'foo-bar'
) // => true

R.startsWith(
  'bar',
  'foo-bar'
) // => false

Source

Try in REPL

subtract

subtract(a: number, b: number): number

R.subtract(3, 1) // => 2

T

R.T() // => true

tail

tail(arrOrStr: T[]|string): T[]|string

• It returns all but the first element of arrOrStr

R.tail([1, 2, 3])  // => [2, 3]
R.tail('foo')  // => 'oo'

Source

Try in REPL

take

take(num: number, arrOrStr: T[]|string): T[]|string

• It returns the first num elements of arrOrStr.

R.take(1, ['foo', 'bar']) // => ['foo']
R.take(2, ['foo']) // => 'fo'

Source

Try in REPL

takeLast

takeLast(num: number, arrOrStr: T[]|string): T[]|string

• It returns the last num elements of arrOrStr.

R.takeLast(1, ['foo', 'bar']) // => ['bar']
R.takeLast(2, ['foo']) // => 'oo'

Source

Try in REPL

test

test(regExpression: Regex, str: string): boolean

• Determines whether str matches regExpression

R.test(/^f/, 'foo') 
// => true

Source

Try in REPL

times

times(fn: Function, n: number): T[]

It returns the result of applying function fn over members of range array. The range array includes numbers between 0 and n(exclusive).

R.times(R.identity, 5)
//=> [0, 1, 2, 3, 4]

Source

Try in REPL

toLower

toLower(str: string): string

R.toLower('FOO') // => 'foo'

toString

toString(x: any): string

R.toString([1, 2]) // => '1,2'

toUpper

toUpper(str: string): string

R.toUpper('foo') // => 'FOO'

trim

trim(str: string): string

R.trim('  foo  ') // => 'foo'

type

type(a: any): string

R.type(() => {}) // => 'Function'
R.type(async () => {}) // => 'Async'
R.type([]) // => 'Array'
R.type({}) // => 'Object'
R.type('foo') // => 'String'
R.type(1) // => 'Number'
R.type(true) // => 'Boolean'
R.type(null) // => 'Null'
R.type(/[A-z]/) // => 'RegExp'

const delay = ms => new Promise(resolve => {
  setTimeout(function () {
    resolve()
  }, ms)
})
R.type(delay) // => 'Promise'

Source

Try in REPL

uniq

uniq(arr: T[]): T[]

It returns a new array containing only one copy of each element in arr.

R.uniq([1, 1, 2, 1])
// => [1, 2]

Source

Try in REPL

uniqWith

uniqWith(fn: Function, arr: T[]): T[]

It returns a new array containing only one copy of each element in arr according to boolean returning function fn.

const arr = [
  {id: 0, title:'foo'},
  {id: 1, title:'bar'},
  {id: 2, title:'baz'},
  {id: 3, title:'foo'},
  {id: 4, title:'bar'},
]

const expectedResult = [
  {id: 0, title:'foo'},
  {id: 1, title:'bar'},
  {id: 2, title:'baz'},
]

const fn = (x,y) => x.title === y.title

const result = R.uniqWith(fn, arr)

console.log(result === expectedResult) // => true

Source

Try in REPL

update

update(i: number, replaceValue: T, arr: T[]): T[]

It returns a new copy of the arr with the element at i index replaced with replaceValue.

R.update(0, 'foo', ['bar', 'baz'])
// => ['foo', baz]

Source

Try in REPL

values

values(obj: Object): Array

It returns array with of all values in obj.

R.values({a: 1, b: 2})
// => [1, 2]

Source

Try in REPL

without

without(a: T[], b: T[]): T[]

It will return a new array based on b array.

This array contains all members of b array, that doesn't exist in a array.

Method R.equals is used to determine the existance of b members in a array.

R.without([1, 2], [1, 2, 3, 4])
// => [3, 4]

Source

Benchmark

Tree-shaking

Use with ES5

import omit from 'rambda/lib/omit'

Changelog

• 1.0.11 issue #60 problem with babelrc
• 1.0.10 issue #59 add R.dissoc
• 1.0.9 Close issue #58 - Incorrect R.equals
• 1.0.8 R.map and R.filter pass object properties when mapping over objects
• 1.0.7 Add R.uniqWith
• 1.0.6 Close issue #52 - ES5 compatible code
• 1.0.5 Close issue #51
• 1.0.4 Close issue #50 - add R.pipe typings
• 1.0.3 R.ifElse accept also boolean as condition argument
• 1.0.2 Remove typedDefaultTo and typedPathOr | Add R.pickAll and R.none
• 1.0.0 Major change as build is now ES6 not ES5 compatible (Related to issue #46)| Making Rambda fully tree-shakeable| Edit Typescript definition
• 0.9.8 Revert to ES5 compatible build - issue #46
• 0.9.7 Refactor for Rollup tree-shake | Remove R.padEnd and R.padStart
• 0.9.6 Close issue #44 - R.reverse mutates the array
• 0.9.5 Close issue #45 - invalid Typescript typings
• 0.9.4 Add R.reject and R.without (PR#41 PR#42) | Remove 'browser' field in package.json due to Webpack bug 4674
• 0.9.3 Add R.forEach and R.times
• 0.9.2 Add Typescript definitions
• 0.9.1 Close issue #36 - move current behaviour of defaultTo to a new method typedDefaultTo; make defaultTo follow Ramda spec; add pathOr; add typedPathOr.
• 0.9.0 Add R.pipe PR#35
• 0.8.9 Add R.isNil
• 0.8.8 Migrate to ES modules PR33 | Add R.flip to the API | R.map/filter works with objects
• 0.8.7 Change Webpack with Rollup - PR29
• 0.8.6 Add R.tap and R.identity
• 0.8.5 Add R.all, R.allPass, R.both, R.either and R.complement
• 0.8.4 Learning to run yarn test before yarn publish the hard way
• 0.8.3 Add R.always, R.T and R.F
• 0.8.2 Add concat, padStart, padEnd, lastIndexOf, toString, reverse, endsWith and startsWith methods
• 0.8.1 Add R.ifElse
• 0.8.0 Add R.not, R.includes | Take string as condition for R.pick and R.omit
• 0.7.6 Fix incorrect implementation of R.values
• 0.7.5 Fix incorrect implementation of R.omit
• 0.7.4 issue #13 - Fix R.curry, which used to return incorrectly function when called with more arguments
• 0.7.3 Close issue #9 - Compile to es2015; Approve PR #10 - add R.addIndex to the API
• 0.7.2 Add Promise support for R.type
• 0.7.1 Close issue #7 - add R.reduce to the API
• 0.7.0 Close issue #5 - change name of curry to partialCurry; add new method curry, which works just like Ramda's curry
• 0.6.2 Add separate documentation site via docsify

Browse by category

Function

addIndex

compose

curry

flip

pipe

tap

Math

add

dec

divide

inc

modulo

multiply

subtract

List

adjust

all

any

append

concat

contains

drop

dropLast

endsWith

filter

find

findIndex

flatten

forEach

head

indexOf

init

join

last

lastIndexOf

length

map

none

pluck

prepend

range

reduce

reject

repeat

reverse

sort

splitEvery

startsWith

tail

take

takeLast

times

uniq

uniqWith

update

without

Logic

allPass

anyPass

both

defaultTo

either

ifElse

Object

has

merge

omit

path

pathOr

pick

pickAll

prop

values

Relation

equals

propEq

sortBy

Type

is

isNil

type

String

match

replace

split

test

toLower

toString

toUpper

Additional info

Running benchmarks

• To run all benchmarks

yarn run benchmark all

• To run single or number of benchmarks

yarn run benchmark add compose filter

Libraries using Rambda

• ig-api

• ldap-authenticate

• json-validity

• log-fn

• string-fn

• watch-fn

Articles about Rambda

• Interview with Dejan Totef at SurviveJS blog
• Argumentation of Rambda's curry method

Try in REPL