init commit

.gitignore

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+node_modules
+coverage
+*.log

.travis.yml

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+language: node_js
+node_js:
+  - "0.12"
+  - "0.11"
+  - "iojs"
+
+after_script: NODE_ENV=test istanbul cover ./node_modules/mocha/bin/_mocha --report lcovonly -- -R spec && cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js && rm -rf ./coverage

index.js

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+module.exports = function not(fn){
+  return function(){
+    return !fn.apply(this, arguments)
+  }
+}

package.json

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+{
+  "name": "not",
+  "version": "0.0.0",
+  "main": "index.js",
+  "scripts": {
+    "test": "istanbul test ./node_modules/mocha/bin/_mocha --report html -- -R spec",
+    "coverage": "istanbul cover ./node_modules/mocha/bin/_mocha --report lcovonly -- -R spec && rm -rf ./coverage"
+  },
+  "author": "Pedram Emrouznejad (https://github.com/pemrouz)",
+  "license": "pemrouz.mit-license.org",
+  "devDependencies": {
+    "chai": "^2.3.0",
+    "coveralls": "^2.11.2",
+    "istanbul": "^0.3.13",
+    "mocha": "^2.2.4",
+    "mocha-lcov-reporter": "0.0.2"
+  }
+}

test.js

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+var expect = require('chai').expect
+  , not = require('./')
+
+describe('not', function() {
+  it('should invert result of function', function() {
+    var a = [0, 1, 2, 3]
+    expect(a.filter(Boolean)).to.eql([1,2,3])
+    expect(a.filter(not(Boolean))).to.eql([0])
+  })
+})