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wrappy

1.0.2 • Public • Published

wrappy

Callback wrapping utility

USAGE

var wrappy = require("wrappy")
 
// var wrapper = wrappy(wrapperFunction)
 
// make sure a cb is called only once
// See also: http://npm.im/once for this specific use case
var once = wrappy(function (cb) {
  var called = false
  return function () {
    if (called) return
    called = true
    return cb.apply(this, arguments)
  }
})
 
function printBoo () {
  console.log('boo')
}
// has some rando property
printBoo.iAmBooPrinter = true
 
var onlyPrintOnce = once(printBoo)
 
onlyPrintOnce() // prints 'boo'
onlyPrintOnce() // does nothing
 
// random property is retained!
assert.equal(onlyPrintOnce.iAmBooPrinter, true)

Keywords

none

install

npm i wrappy

Downloadsweekly downloads

5,714,973

version

1.0.2

license

ISC

homepage

github.com

repository

Gitgithub

last publish

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