History

Oliver Bell 935e37c25b feat: support node20 runtime (#1988 ) * feat: support node20 * fix * more fixes * maybe final fixes? * format		2023-09-15 02:24:46 +00:00
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LICENSE	feat: support node20 runtime (#1988 )	2023-09-15 02:24:46 +00:00
README.md	feat: support node20 runtime (#1988 )	2023-09-15 02:24:46 +00:00
package.json	feat: support node20 runtime (#1988 )	2023-09-15 02:24:46 +00:00
wrappy.js	feat: support node20 runtime (#1988 )	2023-09-15 02:24:46 +00:00

README.md

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)