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Tinkering with Javascript
<!doctype html> <html> <head> <meta charset="utf-8"> <title>Tinkering with Javascript</title> </head> <body> <script> var h = { name: 'Computer', cost: '$1,000' }; var test1 = []; var test2 = ['name', 'cost']; var test3 = ['name', 'bio', 'cost']; var hasElems = function (obj, arr) { for (i = 0; i < arr.length; i++) { // commenting this to conceal the answer } return true; } console.log('returns true for an empty array', hasElems(h, test1)); console.log('returns true if it has all the keys', hasElems(h, test2)); console.log('returns false if one or more of the keys isn’t in the hash', hasElems(h, test3)); </script> </body> </html>