#Prelude

Utility set for JS.

• Written in LiveScript.
• Inspired by prelude-ls, underscore and fast.js.
• Every functions can be partially applied and never mutate inputs.
• 300+ Tests

Github pages with more detailed examples are coming soon... (See methods listed blow)

Example

var sortPostsByName = prelude.array.sortBy(function (post) { return post.name; });
var sorted_posts = sortPostsByName posts

Installation

npm install prelude

Methods

All functions with 2 or more arguments can be partially applied and generally return copies of their inputs, thus treating them as immutable. (With the exception of object.assign where this behavior is desired. Use .merge for a immutable version)

Function collection are also exported by their uppercased initial letter. (prelude.S === prelude.string, prelude.A === prelude.array...)

Array prelude.array.<method>

• empty
• has
• includes / contains
• clone
• head / first
• tail / rest
• last
• initial
• slice
• concat
• flatten
• reverse
• each
• map
• filter
• shuffle
• every
• some
• zip
• zipWith
• partition
• unique
• uniqueBy
• difference
• intersection
• union
• sortBy
• countBy
• groupBy
• splitAt
• index
• indices
• findIndex
• findIndices

Object prelude.object.<method>

• empty
• has
• includes / contains
• keys
• values
• clone
• flatten
• explode
• each
• map
• filter
• every
• some
• partition
• keyOf
• keysOf
• findKey
• findKeys
• fromPairs
• toPairs
• fill
• deepFill
• assign / mixin
• deepAssign / deepMixin
• merge
• deepMerge
• freeze
• deepFreeze
• toJSON
• fromJSON
• fromJSONUnsafe
• definePublic
• definePrivate
• defineStatic
• defineMeta

String prelude.string.<method>

• empty
• includes / contains
• startsWith
• endsWith
• trim
• trimLeft
• trimRight
• repeat
• reverse
• capitalize
• capitalizeSentence
• decapitalize
• decapitalizeSentence
• camelize
• dasherize

Number prelude.number.<method>

• even
• odd
• random
• range
• gcd
• lcm

Func prelude.func.<method>

• id
• curry
• compose
• apply
• applyTo
• applyNew
• flip
• delay
• interval
• immediate
• tryCatch
• once
• chain

Type prelude.type.<method>

• getType
• isNumber
• isString
• isBoolean / isBool
• isFunction
• isArray
• isSet
• isObject
• isMap
• isArguments
• isDate
• isError
• isRegExp
• isSymbol
• isDefined
• isNull
• isUndefined
• isUUID
• isInteger / isInt
• inRange
• isNumberArray
• isStringArray
• isBooleanArray / isBoolArray
• isFunctionArray
• isArrayArray
• isSetArray
• isMapArray
• isArgumentsArray
• isObjectArray
• isDateArray
• isErrorArray
• isRegExpArray
• isSymbolArray
• isNullArray
• isUndefinedArray
• isUUIDArray
• isIntegerArray / isIntArray
• isDefinedArray

Kudos

Thanks to George Zahariev for LiveScript and prelude-ls which made an awesome base for this lib.