gengenerator

gengenerator is a useless generator. Don't be serious. Here is also a repository to collect examples for ES6 generator.

Install

To install the stable version

$ npm install gengenerator

Examples

Define a global gengenerator

const gengenerator = require('gengenerator');

gengenerator(any, generator)

any can be any primitive data types generator is a generator function with one parameter

• Infinite counter

const counter = gengenerator({ count: 0 }, function * f(init) {
  while(1) {
    yield init.count++;
  }
});

console.log(counter.next().value); // 0
console.log(counter.next().value); // 1
console.log(counter.next().value); // 2

• Ticket number generator

const ticker = gengenerator({
  index: 1,
  day: new Date().toISOString().substring(0, 10)
}, function * f(init) {
  while(1) {
    let today = new Date().toISOString().substring(0, 10);
    if(init.day !== today) {
      init.day = today;
      init.index = 1;
    }
    yield `${init.day}-${init.index++}`;
  }
});

console.log(ticker.next().value); // 2016-01-01-1
console.log(ticker.next().value); // 2016-01-01-2
console.log(ticker.next().value); // 2016-01-01-3
// Run in next day, maybe change your system time right now and test it
console.log(ticker.next().value); // 2016-01-02-1

• Guess the Numbers Puzzle

Intercept a value with .next. Guess a number between 1 and 100.

const bingo = gengenerator({
  min: 0,
  max: 101,
  bonus: 30, // You can make it random
}, function * f(init) {
  const io = (min, max) => `${min} - ? - ${max}`;
  while(1) {
    let input = yield io(init.min, init.max);
    if(input <= init.min || input >= init.max) {
      console.log('Wrong input, input again');
    }
    if(input === init.bonus) {
      return 'Bingo!';
    }
    if(input < init.bonus && input > init.min) {
      init.min = input;
    } else if(input > init.bonus && input < init.max) {
      init.max = input;
    }
  }
});

bingo.next(); // Start the game
console.log(bingo.next(31).value); // 0 - ? - 31
console.log(bingo.next(29).value); // 29 - ? - 31
console.log(bingo.next(30).value); // Bingo!

Have fun !

Contribute

We're happy to discuss and see suggestions. Feel free to contribute in order to see the power of generator.

License

MIT

Copyright

Copyright (C) 2016 Tony Ngan, released under the MIT License.