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)

Versions

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    Downloads (Last 7 Days)
    • Tag
  • 1.0.2
    47,241,360
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Version History

  • Version
    Downloads (Last 7 Days)
    • Published
  • 0.0.0
    7
  • 1.0.2
    47,241,360
  • 1.0.1
    22,754
  • 1.0.0
    58

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Install

npm i wrappy

Weekly Downloads

38,214,080

Version

1.0.2

License

ISC

Last publish

Collaborators

  • isaacs