npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

@logdna/stdlib

v2.0.0

Published

Standardized module functions free of business logic

Downloads

80,440

Readme

stdlib

Coverage Status semantic-release  All Contributors

Standardized modular package exposing language constructs - free of business logic.

Main Goals

  • Free of business logic
  • Consistent api
  • Explicitness
  • Lacking in dependencies
  • Lacking indirection
  • Highly debuggable
  • Highly testable

Installation

> npm install @logdna/stdlib

API

array

Common array manipulation functions

toArray(item: any): Array

Converts or wraps anything in an array. Set objects will be converted to arrays. A String will be treated as a CSV and parsed into an array. If an array cannont be coerced from the input value, it will be wrapped in an a single element array

Arguments:

  • item - The element to convert to an array.

returns result Array: The resulting array for input coercion

Example
const {array} = require('@logdna/stdlib')
array.toArray() // []
array.toArray(null) // []
array.toArray(1) // [1]
array.toArray('1,2, 4, 3') // [1, 2, 4, 3]

iter

Iteration tools for complex and efficient iteration. Inspired by python's itertools

cycle(items: Array): Generator

Iterates endlessly over a single array of items. The elements of the array can be of any type.

Arguments:

  • items (Array) - An array to iterate over

returns Generator A generator object containing the passed in elements

Example
const {iter} = require('@logdna/stdlib')
const numbers = iter.cycle([1, 2, 3])

numbers.next().value // 1
numbers.next().value // 2
numbers.next().value // 3
numbers.next().value // 1
numbers.next().value // 2
numbers.next().value // 3

json

Common json functions

parse(input: String): Object

Safe json parsing function that attempts to json parse a string. If it cannont, undefined will be returned

Arguments

  • input (String) - a json string to parse

returns Object A fully parsed javascript object

Example
const {json} = require('@logdna/stdlib')
json.parse('{"valid": "json"}') // {valid: 'json'}
json.parse('{"invalid" json') // undefined

object

Common object manipulation and intropsection functions

has(obj: Object, property: String [, separator: String = '.']): Boolean

Determines if a specified key is a direct property of an object. This function is safe to call on objects that do not inherit from Object.prototype, unlike attempting to call .hasOwnProperty on input objects

Arguments

  • obj (Object) - The object to introspect
  • key (String) - The name of the property to locate
  • (optional) separator (String) - Delimiter character
    • default: '.'

returns Boolean - True of the key is defined on the input object.

Example
const {object} = require('@logdna/stdlib')
object.has({a: 1}, 'a') // true
object.has({}, 'test') // false
object.has(Object.create(null), 'test') // false
object.has({}, 'hasOwnProperty') // false
object.has({one: {two: {three: 3}}}, 'one-two-three', '-') // true

get(obj: Object, property: String [, separator: String = '.']): any

Returns the value from an object at a specified object path.

Arguments

  • obj (Object) - The object to introspect
  • key (String) - The name of the property to local
  • (optional) separator (String) - Delimiter character
    • default: '.'

returns any - The value at the specified key. If no value is found, undefined will be returned.

Example
const {object} = require('@logdna/stdlib')
const obj = {one: {two: {three: 3}}}
const value = object.get(obj, 'one-two-three', '-') // 3

set(obj: Object, property: String, value: any [, separator: String = '.' ]): Object

Sets a property at the deepest level. Nested objects will be created if they do not exist. Returns the modified object. This will not work on complex Types like arrays or maps; Only POJOs.

NOTE: if you find your self wanting to set the value at a specific index of an array - you probably want an object.

Arguments

  • obj (Object) - The object to introspect
  • key (String) - The name of the property to local
  • value (any) - The value to set at the specified path
  • (optional) separator (String) - Delimiter character
    • default: '.'
Example
const {object} = require('@logdna/stdlib')
const obj = {one: {two: {three: 3}}}
const value = object.set(obj, 'four.five', 6)
// {one: { two: three: 3 }, four: {five: 6}}

filter(obj: Object, test: Function): Object

Similar to array.filter, removes keys from an input object that do not pass the test function

Arguments

  • obj (Object) - The object to introspect
  • test (Function) - The function to be used to reject keys from the input object. If this function returns a truthy value, the key will be included in the final output. If falsey it will be excluded
Example
const {object} = require('@logdna/stdlib')
const obj = {one: { two: three: 3 } }

object.filter({two: 2, three: 3}, (key) => {
   return key.match(/ee$/)
}) // {three: 3}

returns Object An object containing only the keys which passed the test function.

typecast(obj: Object [, depth: Number = 1000]): Object

Recursively typecast string values of enumerable object properties, using string.typecast()

Arguments

  • obj (Object) - The input object
  • key (Number) - The maximum depth to recursively typecast

returns Object A new object with all string properties typecast.

Example
const {object} = require('@logdna/stdlib')
const obj = {foo: '1', bar: 'null', baz: 'three', qux: {foo: '2'}}
const casted = typecast(obj)
// {foo: 1, bar: null, baz: 'three', qux: {foo: 2}}
const with_depth = typecast(obj, 0)
// {foo: 1, bar: null, baz: 'three', qux: {foo: '2'}}

string

camelcase(text: String): String

Casts a string value to its camel case variant

Arguments

  • str String - The string value to convert

returns String A camelcase version of the input string

Example
const {string} = require('@logdna/stdlib')
string.camelcase('Hello George Washington') // helloGeorgeWashington

lowercase(text: String): String

A safe alternative to String.prototype.toLowerCase(). This can be called non string inputs and they will be converted to string prior to lower casing.

Arguments

  • str String - The string value to convert

returns String A lowercased version of the input string

Example
const {string} = require('@logdna/stdlib')
string.lowercase('Hello George Washington') // hello george washington
string.lowercase({}) // [object object]
string.lowercase(null) // ''
string.lowercase(undefined) // ''

uppercase(text: String): String

A safe alternative to String.prototype.toUpperCase(). This can be called non string inputs and they will be converted to string prior to upper casing.

Arguments

  • str String - The string value to convert

returns String A uppercased version of the input string

Example
const {string} = require('@logdna/stdlib')
string.uppercase('Hello George Washington') // HELLO GEORGE WASHINGTON
string.uppercase({}) // [OBJECT OBJECT]
string.uppercase(null) // ''
string.uppercase(undefined) // ''

slugify(text: String [, separator: String = '-']): String

Converts a string to a url friendly format by replacing spaces and symbols with a known value and converting to lower case

Arguments

  • str String - The string value to convert
  • (optional) separator (String) - Delimiter character
    • default: '-'

returns String A slugified version of the input string

Example

const {string} = require('@logdna/stdlib')
string.slugify('A fake Sentence') // a-fake-sentence
string.slugify('A fake Sentence', '::') // a::fake::sentence

typecast(text: String): Object

Best effort to cast a string to its native couter part where possible. Supported casts are booleans, numbers, null and undefined.

Arguments

  • value - The value to cast

returns The native representation of the string input. If the value could not be cast, it will be returned as it was passed.

Example
const {string} = require('@logdna/stdlib')
string.typecast('null') // null
string.typecast('true') // true
string.typecast('10.01') // 10.01
string.typecast({}) // {}

typeOf(element: any): String

A more accurate version of the javascript built-in function typeof

Arguments

  • input - The input object to introspect

returns String A normalized string representation of the input object

Example
const {typeOf} = require('@logdna/stdlib')
typeOf(new Date()) // 'date'
typeOf(/\w+/) // regexp
typeOf(() => {}) // function
typeOf(new Set()) // set

Callable: Class

A class object whose instances are derived from Function and can be called. When exteded, a Symbol function defined by Symbol.for('call') will be executed with any arguments that were passed

Example
const {Callable} = require('@logdna/stdlib')
const __call__ = Symbol.for('call')
class Hello extends Callable {
  constructor(opts) {
    this.yell = !!opts.yell
  }
  [__call__](name) {
    const output = `Hello, ${name}`
    console.log(this.yell ? `${output.toUpperCase()}!` : output)
  }
}

const screamAt = new Hello({yell: true})

screamAt('bill') // HELLO, BILL!

Authors

Contributors ✨

Thanks goes to these wonderful people (emoji key):

This project follows the all-contributors specification. Contributions of any kind welcome!