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Location Description: up to the challenge, this is a fun test , nice tool, write some js functions, with a timer going, see how long it take you to get through

Status: Go Going Been

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Content: use HTML Edit Content <h2>[URL]</h2> <ol> <li>]&nbsp;http://toys.usvsth3m.com/javascript-under-pressure/</li> </ol> <h2>[TEL]</h2> <div><ol> <li>]&nbsp;</li> </ol> <h2>[DIRECTIONS]</h2> <div><ol> <li>]&nbsp;</li> </ol></div> <h2>[REFERENCE]</h2> <ol> <li>]&nbsp;</li> </ol> <h3><strong>// 1] &nbsp;(something like) i will be an integer, double it and return ....????</strong></h3> </div> <div> <div>return i*2 // FAIL b/c</div> <div> <h3><strong>// 2] &nbsp;i will be an integer. Return true if it's even, and false if it isn't.</strong></h3> </div> <div>function isNumberEven(i) { &nbsp;</div> <div>&nbsp; &nbsp;&nbsp;</div> <div>&nbsp; if(i % 2 === 0){</div> <div>&nbsp; &nbsp; return true;</div> <div>&nbsp; }</div> <div>&nbsp; else{</div> <div>&nbsp; &nbsp; return false;</div> <div>&nbsp; }</div> <div>}</div> <div>&nbsp;</div> <h3><strong>// 3 ]</strong>&nbsp;i will be a string representing filename, it may or may not have a file extension, if it does, return the extension name without the dot if it has one, or false if it does not&nbsp;</h3> <div><strong>// this = 21 minutes ttl = 30 minutes</strong></div> <div>// A FAIL</div> <div>function getFileExtension(i) {</div> <div>&nbsp; &nbsp; var substr = i.substring(i.length-4,i.length) ; &nbsp; &nbsp;</div> <div>&nbsp; &nbsp; if ( substr.charAt(0)==='.'){</div> <div>&nbsp; &nbsp; &nbsp; &nbsp; return substr.substring(substr.length-3,substr.length);</div> <div>&nbsp; &nbsp; }</div> <div>&nbsp; &nbsp; else{</div> <div>&nbsp; &nbsp; &nbsp; &nbsp; return false;</div> <div>&nbsp; &nbsp; }</div> <div>}</div> <div>// B</div> <div>function getFileExtension(i) { &nbsp; &nbsp;</div> <div>&nbsp; &nbsp; var substr = i.split('.') ;</div> <div>&nbsp; &nbsp; if ( substr[1]){</div> <div>&nbsp; &nbsp; &nbsp; &nbsp; return substr[1];</div> <div>&nbsp; &nbsp; }</div> <div>&nbsp; &nbsp; else{</div> <div>&nbsp; &nbsp; &nbsp; &nbsp; return false;</div> <div>&nbsp; &nbsp; }</div> <div>}</div> <div>SUCCESS! All tests passed. You've used 30:24 so far. Well done!</div> <div>Top work, that was tricky. Two challenges left! Ready to start the clock again?</div> </div>