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sortDrillJS created by dtstanley - https://repl.it/G9H5/107
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function greatestToLeast(array) { | |
//array.sort(function(a, b) { return b-a; }); descending order | |
return array.sort(function(a,b){ | |
return b-a; | |
}); | |
} | |
/* From here down, you are not expected to | |
understand.... for now :) | |
Nothing to see here! | |
*/ | |
// tests | |
function testFunctionWorks(fn, input, expected) { | |
var result = fn(input); | |
if ( | |
result && | |
result.length === expected.length && | |
result.every(function(item, index) { | |
return (index === 0 || result[index] < result[index-1]); | |
}) && | |
result.every(function(item) { | |
return expected.indexOf(item) > -1; | |
})) { | |
console.log('SUCCESS: `' + fn.name + '` works!') | |
return true; | |
} | |
else { | |
console.error('FAILURE: `' + fn.name + '([' + input + '])` should be ' + expected + | |
' but was ' + fn(input)) | |
return false; | |
} | |
} | |
function runTests() { | |
var input1 = [10, 3, 5, 22, 19]; | |
var result1 = [22, 19, 10, 5, 3]; | |
var input2 = [2, 4, 6, 8]; | |
var result2 = [8, 6, 4, 2]; | |
var testResults = [ | |
testFunctionWorks(greatestToLeast, input1, result1), | |
testFunctionWorks(greatestToLeast, input2, result2), | |
]; | |
var numPassing = testResults.filter(function(result){ return result; }).length; | |
console.log(numPassing + ' out of ' + testResults.length + ' tests passing.'); | |
} | |
runTests(); |
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