Get max and min value from array in JavaScript

Question

I am creating the following array from data attributes and I need to be able to grab the highest and lowest value from it so I can pass it to another function later on   var allProducts     products  children  li    prices        allProducts  each function          var price   parseFloat   this  data  price         prices price    price      console log prices 0    lt  -- this returns undefined   My list items look like this  I have cut down for readability     lt li data-price  29 97  gt  lt a href     gt Product lt  a gt  lt  li gt   lt li data-price  31 00  gt  lt a href     gt Product lt  a gt  lt  li gt   lt li data-price  19 38  gt  lt a href     gt Product lt  a gt  lt  li gt   lt li data-price  20 00  gt  lt a href     gt Product lt  a gt  lt  li gt    A quick console log on prices shows me my array which appears to be sorted so I could grab the first and last element I assume  but presently the names and values in the array are the same so whenever I try and do a prices 0   I get undefined     19 38   19 38 20 00   20 00 29 97   29 97 31 00   31 00   Got a feeling this is a stupidly easy question  so please be kind

User · Answer

arr    9 4 2 93 6 2 4 61 1   ArrMax   Math max apply Math  arr

User · Answer

Why not store it as an array of prices instead of object   prices        allProducts  each function          var price   parseFloat   this  data  price         prices push price       prices sort function a  b    return a - b       this is the magic line which sort the array   That way you can just  prices 0      cheapest prices prices length - 1      most expensive   Note that you can do shift   and pop   to get min and max price respectively  but it will take off the price from the array   Even better alternative is to use Sergei solution below  by using Math max and min respectively   EDIT   I realized that this would be wrong if you have something like  11 5  3 1  3 5  3 7  as 11 5 is treated as a string  and would come before the 3 x in dictionary order  you need to pass in custom sort function to make sure they are indeed treated as float   prices sort function a  b    return a - b

User · Answer

Find largest and smallest number in an array with lodash    x000D   x000D  var array    1  3  2   x000D  var func     over Math max  Math min   x000D  var  max  min    func    array   x000D       gt   3  1  x000D  console log max   x000D  console log min   x000D   lt script src  https   cdnjs cloudflare com ajax libs lodash js 4 17 11 lodash js  gt  lt  script gt  x000D   x000D   x000D

User · Answer

use this and it works on both the static arrays and dynamically generated arrays    var array    12 2 23 324 23 123 4 23 132 23   var getMaxValue   Math max apply Math  array      I had the issue when I use trying to find max value from code below       myTabs   find  li active   prevAll   andSelf   each function                  newGetWidthOfEachTab push parseInt   this  outerWidth                           for  var i   0  i  lt  newGetWidthOfEachTab length  i                  newWidthOfEachTabTotal    newGetWidthOfEachTab i               newGetWidthOfEachTabArr push parseInt newWidthOfEachTabTotal                       getMaxValue   Math max apply Math  array     I was getting  NAN  when I use       var max value   Math max 12  21  23  2323  23     with my code

User · Answer

if you have  scattered   not inside an array  values you can use   var max value   Math max val1  val2  val3  val4  val5

User · Answer

To get min max value in array  you can use   var  array    1 3 2   Math max apply Math  array      3 Math min apply Math  array      1

User · Answer

Instead of  each  another  perhaps more concise  approach to getting all those prices might be   var prices     products  children  li   map function         return   this  prop  data-price       get      additionally you may want to consider filtering the array to get rid of empty or non-numeric array values in case they should exist   prices   prices filter function n   return  isNaN parseFloat n          then use Sergey s solution above   var max   Math max apply Math prices   var min   Math min apply Math prices

[javascript] Get max and min value from array in JavaScript

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