This replacement library is meant provide a bare minimum of underscore methods that allow Backbone to function. These methods include:
bind
clone
create
defaults
defer
each
escape
extend
has
isArray
isEmpty
isEqual
isFunction
isObject
isRegExp
isString
iteratee
keys
map
matches
once
pick
result
size
some
uniqueId
keys
values
pick
isEmpty
pairs
invert
omit
chain
forEach
each
map
collect
reduce
foldl
inject
find
detect
filter
select
every
all
some
any
includes
contains
size
first
last
indexOf
lastIndexOf
isEmpty
reduceRight
foldr
reject
include
invoke
max
min
toArray
head
take
initial
rest
tail
drop
without
difference
shuffle
chain
sample
partition
groupBy
countBy
sortBy
indexBy
findIndex
findLastIndex