How to sort an array based on the length of each element

Question

I have an array like this      arr      arr 0     ab  arr 1     abcdefgh  arr 2     abcd    After sorting  the output array should be   arr 0     abcdefgh  arr 1     abcd  arr 2     ab      I mean  I want in the descending order of the length of each element

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I adapted  shareef s answer to make it concise  I use    sort function arg1  arg2    return arg1 length - arg2 length

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We can use Array sort method to sort this array  ES5 solution  x000D   x000D  var array     ab    abcdefgh    abcd     array sort function a  b  return b length - a length     console log JSON stringify array  null    t     x000D   x000D   x000D    For ascending sort order  a length - b length For descending sort order  b length - a length  ES6 solution Attention  not all browsers can understand ES6 code  In ES6 we can use an arrow function expressions   x000D   x000D  let array     ab    abcdefgh    abcd     array sort  a  b    gt  b length - a length    console log JSON stringify array  null    t     x000D   x000D   x000D

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This code should do the trick   var array     ab    abcdefgh    abcd     array sort function a  b  return b length - a length     console log JSON stringify array  null    t

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lt script gt           arr               arr 0     ab           arr 1     abcdefgh           arr 2     sdfds           arr sort function a b               return a length lt b length                      document write arr    lt  script gt    The anonymous function that you pass to sort tells it how to sort the given array hope this helps I know this is confusing but you can tell the sort function how to sort the elements of the array by passing it a function as a parameter telling it what to do

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You can use Array sort method to sort the array  A sorting function that considers the length of string as the sorting criteria can be used as follows   arr sort function a  b        ASC  - gt  a length - b length      DESC - gt  b length - a length   return b length - a length          Note  sorting   a    b    c   by length of string is not guaranteed to return   a    b    c    According to the specs      The sort is not necessarily stable  that is  elements that compare   equal do not necessarily remain in their original order     If the objective is to sort by length then by dictionary order you must specify additional criteria     c    a    b   sort function a  b      return a length - b length       sort by length  if equal then          a localeCompare b         sort by dictionary order

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Here is the sort  depending on the length of a string with javascript as you asked    the solution of the problem by bubble sort  1    1   http   jsfiddle net sssonline2 vcme3 2 enter code here

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created a sorting function to sort by length of elements of list def sort len a       num   len a      d          i   0     while i lt num          d i    len a i           i    1     b   list d values        b sort       c          for i in b          for j in range num               if j in list d keys                     if d j     i                      c append a j                       d pop j      return c

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Based on Salman s answer  I ve written a small function to encapsulate it    function sortArrayByLength arr  ascYN            arr sort function  a  b                 sort array by length of text             if  ascYN  return a length - b length                  ASC - gt  a - b             else return b length - a length                        DESC - gt  b - a                     then just call it with  sortArrayByLength  myArray  true      Note that unfortunately  functions can should not be added to the Array prototype  as explained on this page   Also  it modified the array passed as a parameter and doesn t return anything  This would force the duplication of the array and wouldn t be great for large arrays  If someone has a better idea  please do comment

User · Answer

If you want to preserve the order of the element with the same length as the original array  use bubble sort  Input     quot ab quot   quot cdc quot   quot abcd quot   quot de quot     Output      quot ab quot   quot cd quot   quot cdc quot   quot abcd quot    Function  function bubbleSort strArray     const arrayLength   Object keys strArray  length      var swapp      var newLen   arrayLength-1      var sortedStrArrByLenght strArray      do           swapp   false          for  var i 0  i  lt  newLen  i                          if  sortedStrArrByLenght i  length  gt  sortedStrArrByLenght i 1  length                               var temp   sortedStrArrByLenght i                  sortedStrArrByLenght i    sortedStrArrByLenght i 1                  sortedStrArrByLenght i 1    temp                 swapp   true                                  newLen--        while  swap     return sortedStrArrByLenght

[javascript] How to sort an array based on the length of each element?

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