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A module to teach you how to module.

github.com/npm/how-to-npm

npm/how-to-npm

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{"_id":"wrappy","_rev":"4-76cc20c0663a83245743762dbe477eb0","name":"wrappy","description":"Callback wrapping utility","dist-tags":{"latest":"1.0.1"},"versions":{"1.0.0":{"name":"wrappy","version":"1.0.0","description":"Callback wrapping utility","main":"wrappy.js","directories":{"test":"test"},"dependencies":{},"devDependencies":{"tap":"^0.4.12"},"scripts":{"test":"tap test/*.js"},"repository":{"type":"git","url":"https://github.com/npm/wrappy"},"author":{"name":"Isaac Z. Schlueter","email":"i@izs.me","url":"http://blog.izs.me/"},"license":"ISC","bugs":{"url":"https://github.com/npm/wrappy/issues"},"homepage":"https://github.com/npm/wrappy","gitHead":"2a0cf2a39be2ebb4a53f2f87db739d98f2a5ebc5","_id":"wrappy@1.0.0","_shasum":"8aae4fc6b4cd6be32a4553985bcf32b3ee131e4e","_from":".","_npmVersion":"2.0.0","_nodeVersion":"0.10.31","_npmUser":{"name":"isaacs","email":"i@izs.me"},"maintainers":[{"name":"isaacs","email":"i@izs.me"}],"dist":{"shasum":"8aae4fc6b4cd6be32a4553985bcf32b3ee131e4e","tarball":"http://localhost:15443/wrappy/-/wrappy-1.0.0.tgz"}},"1.0.1":{"name":"wrappy","version":"1.0.1","description":"Callback wrapping utility","main":"wrappy.js","directories":{"test":"test"},"dependencies":{},"devDependencies":{"tap":"^0.4.12"},"scripts":{"test":"tap test/*.js"},"repository":{"type":"git","url":"https://github.com/npm/wrappy"},"author":{"name":"Isaac Z. Schlueter","email":"i@izs.me","url":"http://blog.izs.me/"},"license":"ISC","bugs":{"url":"https://github.com/npm/wrappy/issues"},"homepage":"https://github.com/npm/wrappy","gitHead":"006a8cbac6b99988315834c207896eed71fd069a","_id":"wrappy@1.0.1","_shasum":"1e65969965ccbc2db4548c6b84a6f2c5aedd4739","_from":".","_npmVersion":"2.0.0","_nodeVersion":"0.10.31","_npmUser":{"name":"isaacs","email":"i@izs.me"},"maintainers":[{"name":"isaacs","email":"i@izs.me"}],"dist":{"shasum":"1e65969965ccbc2db4548c6b84a6f2c5aedd4739","tarball":"http://localhost:15443/wrappy/-/wrappy-1.0.1.tgz"}}},"readme":"# wrappy\u000a\u000aCallback wrapping utility\u000a\u000a## USAGE\u000a\u000a```javascript\u000avar wrappy = require(\"wrappy\")\u000a\u000a// var wrapper = wrappy(wrapperFunction)\u000a\u000a// make sure a cb is called only once\u000a// See also: http://npm.im/once for this specific use case\u000avar once = wrappy(function (cb) {\u000a var called = false\u000a return function () {\u000a if (called) return\u000a called = true\u000a return cb.apply(this, arguments)\u000a }\u000a})\u000a\u000afunction printBoo () {\u000a console.log('boo')\u000a}\u000a// has some rando property\u000aprintBoo.iAmBooPrinter = true\u000a\u000avar onlyPrintOnce = once(printBoo)\u000a\u000aonlyPrintOnce() // prints 'boo'\u000aonlyPrintOnce() // does nothing\u000a\u000a// random property is retained!\u000aassert.equal(onlyPrintOnce.iAmBooPrinter, true)\u000a```\u000a","maintainers":[{"name":"isaacs","email":"i@izs.me"}],"time":{"modified":"2014-09-18T23:13:15.838Z","created":"2014-09-18T22:59:23.410Z","1.0.0":"2014-09-18T22:59:23.410Z","1.0.1":"2014-09-18T23:13:15.838Z"},"homepage":"https://github.com/npm/wrappy","repository":{"type":"git","url":"https://github.com/npm/wrappy"},"author":{"name":"Isaac Z. Schlueter","email":"i@izs.me","url":"http://blog.izs.me/"},"bugs":{"url":"https://github.com/npm/wrappy/issues"},"license":"ISC","readmeFilename":"README.md","_attachments":{}}