![]() As the output shows, when a compare function is used, numbers sort correctly whether they are numbers or numeric strings. This example produces the following output. Var mixedNumericArray = Ĭonsole.log( ' stringArray:', stringArray.join()) Ĭonsole.log( ' Sorted:', stringArray.sort()) Ĭonsole.log( ' numberArray:', numberArray.join()) Ĭonsole.log( ' Sorted without a compare function:', numberArray.sort()) Ĭonsole.log( ' Sorted with compareNumbers:', numberArray.sort(compareNumbers)) Ĭonsole.log( ' numericStringArray:', numericStringArray.join()) Ĭonsole.log( ' Sorted without a compare function:', numericStringArray.sort()) Ĭonsole.log( ' Sorted with compareNumbers:', numericStringArray.sort(compareNumbers)) Ĭonsole.log( ' mixedNumericArray:', mixedNumericArray.join()) Ĭonsole.log( ' Sorted without a compare function:', mixedNumericArray.sort()) Ĭonsole.log( ' Sorted with compareNumbers:', mixedNumericArray.sort(compareNumbers)) So, the compare function has the following form:Ĭopy Code var stringArray = If inconsistent results are returned then the sort order is undefined. compareFunction(a, b) must always return the same value when given a specific pair of elements a and b as its two arguments.If compareFunction(a, b) is greater than 0, sort b to a lower index than a.Mozilla versions dating back to at least 2003) respect this. Note: the ECMAscript standard does not guarantee this behaviour, and thus not all browsers (e.g. If compareFunction(a, b) returns 0, leave a and b unchanged with respect to each other, but sorted with respect to all different elements.If compareFunction(a, b) is less than 0, sort a to a lower index than b, i.e.If a and b are two elements being compared, then: If compareFunction is supplied, the array elements are sorted according to the return value of the compare function. In general, we split the particular string into an array using either the spread operator or the split () method. This is because we will use only three methods that perform different functions and are all used together to achieve this one common goal. Things.sort() // // In Unicode, numbers come before upper case letters, // which come before lower case letters. Using JavaScript methods to reverse a string is simple. Scores.sort() // // Watch out that 10 comes before 2, // because '10' comes before '2' in Unicode code point order. Copy Code var fruit = įruit.sort() // var scores =
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