Find in Path environment variables with babel-node

!Find string in PATH env var - summary.md

Summary	Find the path from PATH env vars which includes string you specified.
Env	win babel-node

README.md

How to use

install babel:

c:\> npm install --global babel

usage:

c:\> babel-node find-from-path-sample.js windows

sample-output:

[ 'C:\\Windows\\system32',
'C:\\Windows',
'C:\\Windows\\System32\\Wbem',
'C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\',
'C:\\Program Files (x86)\\Windows Kits\\8.1\\Windows Performance Toolkit\\',
'C:\\Windows\\system32\\config\\systemprofile\\.dnx\\bin' ]

find-from-path-sample.js

if( process.argv.length < 3 ) { 
  console.log('please specify keyword for search as a command line argument.'); 
  process.exit(1); 
}
var re = new RegExp(process.argv[2], "i");
console.log(
  Object
    .keys(process.env)
    .filter( x => x.toUpperCase() == 'PATH' )
    .map( x => process.env[x].split(';') )
    .reduce( (x,y) => a.concat(b) )
    .filter( x => x.match( re ))
)

one-liner-with-babel-node-repl.js

// find path in PATH environment variable that includes 'windows'
Object.keys(process.env).filter( x => x.toUpperCase() == 'PATH' ).map( x => process.env[x].split(';') ).reduce( (x,y) => a.concat(b) ).filter( x => x.match( /windows/i ))

// ex)
// c:\> babel-node
// > Object.keys(process.env).filter( x => x.toUpperCase() == 'PATH' ).map( x => process.env[x].split(';') ).reduce( (x,y) => a.concat(b) ).filter( x => x.match( /windows/i ))
// [ 'C:\\Windows\\system32',
//   'C:\\Windows',
//   'C:\\Windows\\System32\\Wbem',
//   'C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\',
//   'C:\\Program Files (x86)\\Windows Kits\\8.1\\Windows Performance Toolkit\\',
//   'C:\\Windows\\system32\\config\\systemprofile\\.dnx\\bin' ]
// >.exit
// c:\>