initial commit

.gitignore

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+# Compiled source #
+###################
+*.com
+*.class
+*.dll
+*.exe
+*.o
+*.so
+
+# Packages #
+############
+# it's better to unpack these files and commit the raw source
+# git has its own built in compression methods
+*.7z
+*.dmg
+*.gz
+*.iso
+*.jar
+*.rar
+*.tar
+*.zip
+
+# Logs and databases #
+######################
+*.log
+*.sql
+*.sqlite
+
+# OS generated files #
+######################
+.DS_Store*
+ehthumbs.db
+Icon?
+Thumbs.db
+
+# Node.js #
+###########
+lib-cov
+*.seed
+*.log
+*.csv
+*.dat
+*.out
+*.pid
+*.gz
+
+pids
+logs
+results
+
+node_modules
+npm-debug.log
+
+# Components #
+##############
+
+/build
+/components
+
+# ImageMagick #
+###############
+
+*.cache
+*.mpc
+
+# Other #
+#########
+test/*.2
+test/*/*.2
+test/*.mp4
+test/images/originalSideways.jpg.2

.npmignore

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+test.js

.travis.yml

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+node_js:
+- "0.10"
+language: node_js

Makefile

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+BIN = ./node_modules/.bin/
+
+test:
+	@${BIN}mocha --reporter spec
+
+.PHONY: test

component.json

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+{
+  "name": "wilson-score",
+  "description": "Because averages suck",
+  "version": "0.0.1",
+  "license": "MIT",
+  "scripts": [
+    "index.js"
+  ],
+  "main": "index.js",
+  "repo": "jonathanong/wilson-score"
+}

index.js

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+module.exports = function (up, total, z) {
+  // http://amix.dk/blog/post/19588
+  // 95% = 1.644853
+  // 99% = 2.326348
+  z = z || 2.326348
+  if (total <= 0 || total < up)
+    return 0
+
+  var phat = up/total, z2 = z*z;
+  return (phat + z2/(2*total) - z*Math.sqrt((phat*(1 - phat) + z2/(4*total))/total))/(1 + z2/total)
+}

package.json

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+{
+  "name": "wilson-score",
+  "description": "Because averages suck",
+  "version": "0.0.1",
+  "author": {
+    "name": "Jonathan Ong",
+    "email": "[email protected]",
+    "url": "http://jongleberry.com",
+    "twitter": "https://twitter.com/jongleberry"
+  },
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/jonathanong/wilson-score.git"
+  },
+  "bugs": {
+    "mail": "[email protected]",
+    "url": "https://github.com/jonathanong/wilson-score/issues"
+  },
+  "devDependencies": {
+    "mocha": "*"
+  },
+  "scripts": {
+    "test": "make test;"
+  }
+}

test.js

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+var assert = require('assert')
+
+var wilson = require('./')
+
+describe('Wilson Score', function () {
+  it('should be lower than the average', function () {
+    assert.ok(wilson(3, 5) < 3 / 5)
+  })
+
+  it('should be 0 if there are no ups', function () {
+    assert.equal(wilson(0, 100), 0)
+  })
+})