nv-facutil-simple-next-prev v1.0.1

nv-facutil-simple-next-prev

• simple next-prev data-ctx

install

• npm install nv-facutil-simple-next-prev

usage

const {Data} = require("nv-facutil-simple-next-prev")

example

    var data = new Data({a:100,b:200,c:300})

    /*
    > data
    Data { a: 100, b: 200, c: 300 }
    >
    > data.history_
    SimpleHistory(1) [
      { a: 100, b: 200, c: 300 },
      max_size: Infinity,
      noexist: Symbol(noexist)
    ]
    >
    */

    data.next((r)=>{r.a=r.a+1;r.b=r.b+1;r.c=r.c+1})

    /*
    >
    Data { a: 101, b: 201, c: 301 }
    >
    > data.history_
    SimpleHistory(2) [
      { a: 100, b: 200, c: 300 },
      { a: 101, b: 201, c: 301 },
      max_size: Infinity,
      noexist: Symbol(noexist)
    ]
    >

    */

    data.next((r)=>{r.a=r.a+1;r.b=r.b+1;r.c=r.c+1})

    /*
    > data
    Data { a: 102, b: 202, c: 302 }
    >
    > data.history_
    SimpleHistory(3) [
      { a: 100, b: 200, c: 300 },
      { a: 101, b: 201, c: 301 },
      { a: 102, b: 202, c: 302 },
      max_size: Infinity,
      noexist: Symbol(noexist)
    ]
    >
    */

    data.prev()

    /*

    > data.prev()
    Data { a: 101, b: 201, c: 301 }
    >
    > data
    Data { a: 101, b: 201, c: 301 }
    >
    > data.history_
    SimpleHistory(2) [
      { a: 100, b: 200, c: 300 },
      { a: 101, b: 201, c: 301 },
      max_size: Infinity,
      noexist: Symbol(noexist)
    ]
    >
    */

    /*
    > data.prev()
    Data { a: 100, b: 200, c: 300 }
    >
    > data.prev()
    Data {}
    > data.history_
    SimpleHistory(0) [ max_size: Infinity, noexist: Symbol(noexist) ]
    >
    */

METHODS

  new Data(init_data={},copy_func=DFLT_COPY,asgn_func=DFLT_ASSIGN,max_hist_size=Infinity,none=noexist)

  //getter/setter
      data.assign_func_              
      data.copy_func_               
  //getter
      data.history_              
      data.max_hist_size_        
      data.noexist_

  data.clear()
  data.prev(handle,copy_func=DFLT_COPY,asgn_func=DFLT_ASSIGN)
  data.next(handle=(r)=>r,asgn_func=DFLT_ASSIGN)

APIS

• DFLT_COPY(that)
• DFLT_ASSIGN(that,O)

LICENSE

• ISC