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def calculate_bmi(weight_in_pounds, height_in_inches)
  return ((weight_in_pounds.to_f/height_in_inches.to_f**2) * 703)
end

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Boot file system in single user mode: hold down Command-S immediately after the startup tone. 
Make the file system read-write: /sbin/mount -uw /
Delete the contents of three directories:

rm -rf /Library/Caches/*
rm -rf /System/Library/Caches/*
rm -rf /Users/<username>/Library/Caches/*

Be very careful about the rm -rf command! 

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var REFLOW = (function(window, $){
    var self = {};
 
    var nth;
    var itemsAfterFirstRow;
    var allItems = $('#items .col');
    
    self.init = function(){
        self.adjustHeights();
        

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# This script uses the Plos.org API to collect article data.
# Necessary libraries
require 'csv'
require 'work_queue'
require 'rest-client'

# The file name for the CSV file that will be READ
CSV_FILENAME = "9_10_2014-Cumulative-Report-With-Subject-Area-and-Article-Type.csv"
# The file name for the CSV file that will be WRITTEN
CSV_OUTPUT_FILENAME = "9_10_2014-Cumulative-Report-With-ALM-Data.csv"

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# This script scrapes the PlosOne.org website to extract data for articles. At the time, this data was not available in the API.
# Necessary libraries
require 'CSV'
require 'nokogiri'
require 'open-uri'
require 'work_queue'
require 'benchmark'

CSV_FILENAME = "9_10_2014-Cumulative-Report.csv"

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jQuery(document.body).on("mouseup", function(){ console.time("Tab showing") });
jQuery(".nav-tabs li:nth-child(1)").on("mouseup", function(){ console.timeEnd("Tab showing"); })
var target = document.querySelector(".nav-tabs li:nth-child(2)");

var observer = new MutationObserver(function(mutations) {
  mutations.forEach(function(mutation) {
    console.timeEnd("Tab showing");
  });    
});

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<a href="#nogo" class="button--PRIMARY">Primary Button</a>
<br />
<a href="#nogo" class="button--SECONDARY">Secondary button</a>

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var prices = document.querySelectorAll('[class*="color-price a-text-bold"]');
prices = Array.prototype.slice.call(prices);

var total = 0;

prices.forEach(function (price) {
    total += parseFloat(price.textContent.replace('$', ''));
});

alert(total);

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/**
 * Diff Java resource bundles to find missing keys.
 */
var fs = require('fs');

var englishFile = 'path/to/ResourceBundleMessage.properties';
var germanFile = 'path/to/ResourceBundleMessage_de.properties';
var japaneseFile = 'path/to/ResourceBundleMessage_ja.properties';
var chineseFile = 'path/to/ResourceBundleMessage_zh_CN.properties';

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# Aliases
alias editprofile="nano ~/.bash_profile"
alias loadprofile="source ~/.bash_profile"
alias flushdns="sudo discovery udnsflushcaches"
alias pythonserver="python -m SimpleHTTPServer 8000"
alias mochatest="mocha test/setup.js --compilers js:babel-core/register --require ignore-styles "
alias setprod="export NODE_ENV=production"
alias setdev="unset NODE_ENV"
alias checkenv="echo \$NODE_ENV"
alias disableipv6="networksetup -setv6off Wi-Fi"