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

ltgt

v2.2.1

Published

implement correct ranges for level-*

Downloads

3,749,535

Readme

ltgt

implement correct ranges for level-*

build status testling badge

example

var ltgt = require('ltgt')

ltgt.start(range) //the start of the range
ltgt.end(range)   //the end of the range

//returns the lower/upper bound, whether it's inclusive or not.
ltgt.lowerBound(range)
ltgt.upperBound(range)

ltgt.lt(range)
ltgt.gt(range)
ltgt.lte(range)
ltgt.gte(range)

//return wether this is a reversed order
//(this is significant for start/end ranges
ltgt.reverse(range)
var filter = ltgt.filter(range)

filter(key) == true //if key contained in range.

ltgt.contains(range, key)

ways to specify ranges

there have been a variety of ways to specify ranges in level-*. this module supports them all.

gt/gte, lt/lte

specify a range between a lower bound (gt, gte) and an upper bound (lt, lte)

if gte and gt is undefined, read from the start of the database, if lte and lt is undefined, read until the end of the database,

min, max

legacy level-sublevel style, synonym for gte, lte.

start, end, reverse

legacy levelup style.

The range is from start -> end, start does not specify the lowest record, instead it specifies the first record to be read. However, reverse must also be passed correctly. This is way to specify a range is confusing if you need to read in reverse, so it's strongly recommended to use gt/gte,lt/lte.

If reverse is true, start must be undefined or less than end, unless end is undefined.

if reverse is false end must be undefined or greater than start, unless start is undefined.

if start is undefined, read from the first record in the database if end is undefined read until the last record in the database.

api

ltgt.contains(range, key, compare)

using the provided compare method, return true if key is within range. compare defaults to ltgt.compare

ltgt.filter(range, compare)

return a function that returns true if it's argument is within range. can be passed to Array.filter

[1,2,3,4,5].filter(ltgt.filter({gt: 2, lte: 4})
// => [3, 4]

ltgt.lowerBound(range)

return the lower bound of range. Incase the lower bound is specified with gt, check ltgt.lowerBoundExclusive

ltgt.upperBound(range)

return the upperBound of range. Incase the upper bound is specified with gt, check ltgt.upperBoundExclusive

ltgt.lowerBoundExclusive(range)

return true if upper bound is exclusive.

ltgt.upperBoundExclusive(range)

return true if lower bound is exclusive.

ltgt.start(range, default)

The start of the range. This takes into account direction (reverse) If a start is not provided, default is used.

ltgt.end(range, default)

The end of the range. This takes into account direction (reverse) If a end is not provided, default is used.

ltgt.startInclusive(range)

returns true if the range should start at the exact value returned by start(range) otherwise, it should skip one input.

ltgt.endInclusive(range)

returns true if the range should include the exact value returned by end(range) otherwise, it should end on that value.

ltgt.toLtgt(range, _range, map, lowerBound, upperBound)

convert a range to a new ltgt range. _range is the object to return - if you want to mutate range call ltgt.toLtgt(range, range, map)

map gets called on each key in the range, and wether it's an upper or lower bound - so can be used as an encode function.

map(value, isUpperBound) if isUpperBound is false, this is the lower bound.

License

MIT