nv-array-fit v1.0.2

nv-array-fit

• nv-array-fit
• similiar to regexp, but using function to define-pattern

install

• npm install nv-array-fit

usage

const {Desc,gen,get_all_match,get_fst_match} = require("nv-array-fit")

interface Desc {
     cond:(ele:any):boolean=>{}                     //the match-pattern function
     min:number;                                   //the min-times of corresponding pattern-match
     max:number;                                   //the max-times of corresponding pattern-match
}

    

example

var ary = Array.from("aaabbcccdd")


var descs = [
    new Desc((r)=>r==='a' || r ==='b',1,5),
    new Desc((r)=>r==='b' || r ==='c',0,3),
    new Desc((r)=>r==='c' || r ==='d',0,Infinity)
]


> descs[0]
Desc { cond: [Function (anonymous)], min: 1, max: 5 }
>
> descs[1]
Desc { cond: [Function (anonymous)], min: 0, max: 3 }
>
> descs[2]
Desc { cond: [Function (anonymous)], min: 0, max: Infinity }
>

> var matches = get_all_match(descs,ary)

> matches
[
  [ [ 'a', 'a', 'a' ], [ 'b', 'b' ], [ 'c', 'c', 'c', 'd', 'd' ] ],
  [ [ 'a', 'a', 'a' ], [ 'b', 'b', 'c' ], [ 'c', 'c', 'd', 'd' ] ],
  [ [ 'a', 'a', 'a', 'b' ], [ 'b' ], [ 'c', 'c', 'c', 'd', 'd' ] ],
  [ [ 'a', 'a', 'a', 'b' ], [ 'b', 'c' ], [ 'c', 'c', 'd', 'd' ] ],
  [ [ 'a', 'a', 'a', 'b' ], [ 'b', 'c', 'c' ], [ 'c', 'd', 'd' ] ],
  [ [ 'a', 'a', 'a', 'b', 'b' ], [], [ 'c', 'c', 'c', 'd', 'd' ] ],
  [ [ 'a', 'a', 'a', 'b', 'b' ], [ 'c' ], [ 'c', 'c', 'd', 'd' ] ],
  [ [ 'a', 'a', 'a', 'b', 'b' ], [ 'c', 'c' ], [ 'c', 'd', 'd' ] ],
  [ [ 'a', 'a', 'a', 'b', 'b' ], [ 'c', 'c', 'c' ], [ 'd', 'd' ] ]
]
>
> matches.map(e=>e.map(r=>r.join("")).join("-"))
[
  'aaa-bb-cccdd',
  'aaa-bbc-ccdd',
  'aaab-b-cccdd',
  'aaab-bc-ccdd',
  'aaab-bcc-cdd',
  'aaabb--cccdd',
  'aaabb-c-ccdd',
  'aaabb-cc-cdd',
  'aaabb-ccc-dd'
]
>

API

• ary_fit.Desc
• ary_fit.gen(descs,input_array)
• ary_fit.get_all_match(descs,input_array)
• ary_fit.get_fst_match(descs,input_array)

RESTRICT

• this tool did NOT using NFA/DFA
• it just enum all possible match and-then do the test
• so it is SLOW if the input-array too large
• it is suitable for function-params-pattern parse in macro-like tool

LICENSE

• ISC