l0bsterssg

node.js static responsive blog post generator
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README.md (685B)

      1 # wrappy
      2 
      3 Callback wrapping utility
      4 
      5 ## USAGE
      6 
      7 ```javascript
      8 var wrappy = require("wrappy")
      9 
     10 // var wrapper = wrappy(wrapperFunction)
     11 
     12 // make sure a cb is called only once
     13 // See also: http://npm.im/once for this specific use case
     14 var once = wrappy(function (cb) {
     15   var called = false
     16   return function () {
     17     if (called) return
     18     called = true
     19     return cb.apply(this, arguments)
     20   }
     21 })
     22 
     23 function printBoo () {
     24   console.log('boo')
     25 }
     26 // has some rando property
     27 printBoo.iAmBooPrinter = true
     28 
     29 var onlyPrintOnce = once(printBoo)
     30 
     31 onlyPrintOnce() // prints 'boo'
     32 onlyPrintOnce() // does nothing
     33 
     34 // random property is retained!
     35 assert.equal(onlyPrintOnce.iAmBooPrinter, true)
     36 ```