nl_tokens: Process specified wildcard glob patterns or filenames against a callback excluding and uniquing files in the result set .
pl_tokens: function processPatterns ( patterns , fn ) { // Filepaths to return. var result = [ ] ; // Iterate over flattened patterns array. _ . flattenDeep ( patterns ) . forEach ( function ( pattern ) { // If the first character is ! it should be omitted var exclusion = pattern . indexOf ( '!' ) === 0 ; // If the pattern is an exclusion, remove the ! if ( exclusion ) { pattern = pattern . slice ( 1 ) ; } // Find all matching files for this pattern. var matches = fn ( pattern ) ; if ( exclusion ) { // If an exclusion, remove matching files. result = _ . difference ( result , matches ) ; } else { // Otherwise add matching files. result = _ . union ( result , matches ) ; } } ) ; return <mask> ; }