Nu Map from Imperative Languages

The idea behind this table is to help you understand how Nu built-ins and plugins relate to imperative languages. We’ve tried to produce a map of programming-relevant Nu commands and what their equivalents are in other languages. Contributions are welcome.

Note: this table assumes Nu 0.94 or later.

Nushell	Python	Kotlin (Java)	C++	Rust
append	list.append, set.add	add	push_back, emplace_back	push, push_back
math avg	statistics.mean
math, Math Operators	Math operators	Math operators	Math operators	Math operators
cp	shutil.copy			fs::copy
date	datetime.date.today	java.time.LocalDate.now
drop	list[:-3]
du, ls --du	shutil.disk_usage
each for	for	for	for	for
exit	exit()	System.exit, kotlin.system.exitProcess	exit	exit
http get	urllib.request.urlopen
first	list[:x]	List[0], peek	vector[0], top	Vec[0]
format	format	format	format	format!
from	csv, json, sqlite3
get	dict[\"key\"]	Map[\"key\"]	map[\"key\"]	HashMap["key"], get, entry
group-by	itertools.groupby	groupBy		group_by
headers	keys
help	help()
insert	dict[\"key\"] = val		map.insert({ 20, 130 })	map.insert(\"key\", val)
is-empty	is None, is []	isEmpty	empty	is_empty
take	list[:x]			&Vec[..x]
take until	itertools.takewhile
take while	itertools.takewhile
kill	os.kill
last	list[-x:]			&Vec[Vec.len()-1]
length	len	size, length	length	len
lines	split, splitlines	split	views::split	split, split_whitespace, rsplit, lines
ls	os.listdir			fs::read_dir
match	match	when		match
merge	dict.append			map.extend
mkdir	os.mkdir			fs::create_dir
mv	shutil.move			fs::rename
get	list[x]	List[x]	vector[x]	Vec[x]
open	open
transpose	zip(\*matrix)
http post	urllib.request.urlopen
prepend	deque.appendleft
print	print	println	printf	println!
ps	os.listdir('/proc')
pwd	os.getcwd			env::current_dir
range type	range	.., until, downTo, step	iota	..
reduce	functools.reduce	reduce	reduce	fold, rfold, scan
reject	del
rename	dict[\"key2\"] = dict.pop(\"key\")			map.insert(\"key2\", map.remove(\"key\").unwrap())
reverse	reversed, list.reverse	reverse, reversed, asReversed	reverse	rev
rm	os.remove
save	io.TextIOWrapper.write
select	{k:dict[k] for k in keys}
shuffle	random.shuffle
str stats str length length	len			len
skip	list[x:]			&Vec[x..], skip
skip until	itertools.dropwhile
skip while	itertools.dropwhile			skip_while
sort-by	sorted, list.sort	sortedBy, sortedWith, Arrays.sort, Collections.sort	sort	sort
split row	str.split{,lines}, re.split	split	views::split	split
str	str functions	String functions	String functions	&str, String functions
str join	str.join	joinToString		join
str trim	strip, rstrip, lstrip	trim, trimStart, trimEnd	Regex	trim, trim*{start,end}, strip*{suffix,prefix}
math sum	sum	sum	reduce	sum
to	import csv, json, sqlite3
touch	open(path, 'a').close()
uniq	set	Set	set	HashSet
upsert	dict[\"key\"] = val
version	sys.version, sys.version_info
with-env $env.FOO = "bar"	os.environ
where	filter	filter	filter	filter
which	shutil.which
wrap	{ "key" : val }

Ported from nushell/nushell.github.io. Copyright (c) 2021 Nushell Project. MIT License.