mapping.md

Mapping for Lodash and Ramda

Remeda functions are not necessarily drop-in replacements for the listed Lodash and Ramda functions. Just as the Lodash function may behave differently than the Ramda equivalent, the Remeda function may also behave differently from either or both. Be sure to consult each library's documentation when migrating.

Remeda	Lodash	Ramda
add	add	add
addProp	set	set
allPass		allPass
anyPass		anyPass
ceil	ceil
chunk	chunk
clamp	clamp	clamp
clone	cloneDeep	clone
concat	concat	concat
conditional	cond	cond
constant	constant	always
debounce	debounce
difference	difference	difference
differenceWith	differenceWith	differenceWith
divide	divide	divide
drop	drop	drop
dropLast	dropRight	dropLast
dropLastWhile	dropRightWhile	dropLastWhile
dropWhile	dropWhile	dropWhile
entries	toPairs	toPairs
evolve		evolve
filter	filter	filter
find	find	find
findIndex	findIndex	findIndex
findLast	findLast	findLast
findLastIndex	findLastIndex	findLastIndex
first	head	head
flat	flatten	flatten
flat	flattenDeep
flatMap	flatMap	chain
floor	floor
forEach	forEach	forEach
forEachObj	forEach	forEachObjIndexed
groupBy	groupBy	groupBy
hasSubobject	isMatch	where
identity	identity	identity
indexBy	keyBy	indexBy
intersection	intersection	intersection
intersectionWith	intersectionWith	innerJoin
invert	invert	invertObj
isDeepEqual	isEqual	equals
isEmpty	isEmpty	isEmpty
isNonNullish		isNotNil
isNullish	isNil	isNil
isObjectType	isObjectLike
isPlainObject	isPlainObject
isSymbol	isSymbol
join	join	join
last	last	last
length	size	length
map	map	map
mapKeys	mapKeys
mapValues	mapValues	mapValues
mapWithFeedback		scan
meanBy	meanBy
merge	assign	merge
mergeAll	assign	mergeAll
mergeDeep		mergeDeepRight
multiply	multiply	multiply
objOf		objOf
omit	omit	omit
omitBy	omitBy
once	once	once
partition	partition	partition
pathOr	get	pathOr
pick	pick	pick
pickBy	pickBy	pickBy
pipe	flow	pipe
product		product
prop	get	prop
randomString
range	range	range
reduce	reduce	reduce
reverse	reverse	reverse
round	round
sample	sampleSize*
set	set	assoc
setPath	set	assocPath
shuffle	shuffle
sort		sort
sortBy	orderBy
sortBy	sortBy	sortBy
sortedIndex	sortedIndex
sortedIndexBy	sortedIndexBy
sortedLastIndex	sortedLastIndex
sortedLastIndexBy	sortedLastIndexBy
splice		remove
splitAt		splitAt
splitWhen		splitWhen
stringToPath	toPath
subtract	subtract	subtract
sum	sum	sum
sumBy	sumBy
swapIndices		swap
swapProps		swap
take	take	take
takeLastWhile	takeRightWhile	takeLastWhile
takeWhile	takeWhile	takeWhile
tap	tap	tap
times	times	times
unique	uniq	uniq
uniqueBy	uniqBy	uniqBy
uniqueWith	uniqWith	uniqWith

Helpful one-liners

Some lodash and ramda functions don't have a Remeda equivalent, but can be easily replaced with a one-liner in TypeScript. Some of the most common are listed below.

TypeScript one-liners are not necessarily drop-in replacements that provide the exact functionality of the listed Lodash and Ramda functions. Be sure to consult each library's documentation and to check what features you are relying on when migrating.

Remeda	Lodash	Ramda
(arr, val) => [...arr, val]		append
a?.b?.c	path
n => a[n]	nth	nth
R.constant(undefined)	noop
R.filter.indexed((item, index, array) => index === 0 || item !== array[index - 1])	sortedUniq
R.filter(R.isNot(fn))	reject	reject
R.filter(R.isTruthy)	compact
R.firstBy([fn, "desc"])	maxBy	maxBy
R.firstBy([R.identity, "desc"])	max	max
R.firstBy(fn)	minBy	minBy
R.firstBy(R.identity)	min	min
R.fromEntries.strict(R.zip(keys, values))	zipObj	zipObj
str => str.split(/\s+/)	words
x => x.a ?? defaultValue	propOr
x => x.a === value	propEq