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thunkify-wrap

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thunkify-wrap

Turn callbacks, arrays, generators, generator functions, and promises into a thunk

  • 0.0.4
  • Source
  • npm
  • Socket score

Version published
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29K
decreased by-2.57%
Maintainers
1
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Created
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thunkify-wrap Build Status

Turn each node function in an object return a thunk. Turn a regular node function into one which returns a thunk, useful for generator-based flow control such as co.

Installation

NPM

Example

// the same as thunkify
var thunkify = require('thunkify-wrap');
var fs = require('fs');

fs.readFile = thunkify(fs.readFile);

fs.readFile('package.json', 'utf8')(function(err, str){

});

// thunkfiy an object
var user = {
  add: function () {},
  show: function () {},
  list: function () {}
}

module.exports = thunkify(user);

event support

you can pass an event object, give end event name list, wrap event to thunk like this

var e = new EventEmitter();
var end = thunkify(e, 'finish');

yield end();
or
yield.end(['close', 'end']); // will cover `finish` event

when specified events emitted, this generator will go on. see more in the source code.

ctx

also you can pass ctx as contenxt into thunkify, and thunkify(object) will use object as the context by default.

var thunkify = require('thunkify-wrap');
var Cal = function (a, b) {
  this.a = a;
  this.b = b;
};

Cal.prototype.plus = function(callback) {
  var self = this;
  setTimeout(function () {
    callback(null, self.a + self.b);
  }, 5);
};

Cal.prototype.minus = function (callback) {
  var self = this;
  setTimeout(function () {
    callback(null, self.a - self.b);
  }, 5);
};

module.exports = Cal;

exports.create1 = function (a, b) {
  return thunkify(new Cal(a, b));
};

// or
exports.create2 = function (a, b) {
  var cal = new Cal(a, b);
  cal.plus = thunkify(cal.plus, cal);
  cal.minus = thunkify(cal.minus, cal);
};

methods

by pass methods list, support only thunkify a part of methods in an object.

exports.create3 = function (a, b) {
  var cal = new Cal(a, b);
  thunkify(cal, cal, ['plus']);
  // or
  thunkify(cal, ['plus']);
};

License

MIT

Keywords

FAQs

Package last updated on 04 Mar 2014

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