Skip to content

rjrodger/gex

master
Switch branches/tags

Name already in use

A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
Code

Latest commit

 

Git stats

Files

Permalink
Failed to load latest commit information.
Type
Name
Latest commit message
Commit time
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

gex

npm version Build Coverage Status DeepScan grade Maintainability Dependency Status

Glob expressions for JavaScript

"When regular expressions are just too hard!"

Match glob expressions using * and ? against any JavaScript data type. The character * means match anything of any length, the character ? means match exactly one of any character, and all other characters match themselves.

const { Gex } = require('gex')

Gex('a*').on( 'abc' ) // returns 'abc'
Gex('a*c').on( 'abbbc' ) // returns 'abbbc'
Gex('a?c').on( 'abc' ) // returns 'abc'

You can also match against objects and arrays:

Gex('a*').on( ['ab','zz','ac'] ) // returns ['ab','ac']
Gex('a*').on( {ab:1,zz:2,ac:3} ) // returns {ab:1,ac:3}

And also match against multiple globs:

Gex(['a*','b*']).on( 'bx' ) // returns 'bx'
Gex(['a*','b*']).on( ['ax','zz','bx'] ) // returns ['ax','bx']

One of the most useful things you can do with this library is quick assertions in unit tests. For example if your objects contain dates, randomly generated unique identifiers, or other data irrelevant for testing, Gex can help you ignore them when you use JSON.stringify:

var entity = {created: new Date().getTime(), name:'foo' }
assert.ok( Gex('{"created":*,"name":"foo"}').on( JSON.stringify(entity) ) )

If you need to use globbing on files, here's how apply a glob to a list of files in a folder:

var fs = require('fs')
fs.readdir('.',function(err,files){ 
  var pngs = Gex('*.png').on(files) 
})

And that's it!

Installation

npm install gex

And in your code:

const { Gex } = require('gex')

Or clone the git repository: git clone git://github.com/rjrodger/gex.git

This library depends on the excellent underscore module: underscore

Usage

The Gex object is a function that takes a single argument, the glob expression. This returns a Gex object that has only one function itself: on. The on function accepts any JavaScript data type, and operates as follows:

  • strings, numbers, booleans, dates, regexes: converted to string form for matching, returned as themselves
  • arrays: return a new array with all the elements that matched. Elements are not modified, but are converted to strings for matching. Does not recurse into elements.
  • objects: return a new object with with all the property names that matched. Values are copied by reference.
  • null, NAN, undefined: never match anything

Support

If you're using this library, feel free to contact me on twitter if you have any questions! :) @rjrodger

This module works on both Node.js and browsers.

License

Copyright (c) 2010-2020, Richard Rodger and other contributors. Licensed under MIT.

About

Glob Expressions for JavaScript

Resources

License

Stars

Watchers

Forks

Packages

No packages published