Get small element index till array length

Question

I have to sort an array and want to get index so that I can sort another array on the basis of this index.. There are two array a and b I saved division of that array in third array that is sortDiv now I want index of small element so that I can sort a and b according to index.. Code is like

   var a = [6, 7, 8, 9];
var b = [1, 2, 3, 4];

var sortA = [],
  sortB = [],
  sortDiv = [];
var div = a[0] / b[0];
for (var i = 0; i < a.length; i++) {
  sortDiv.push(a[i] / b[i]);
}
var temp = sortDiv;
for (var i = 1; i < sortDiv.length; i++) {
  var val = Math.min.apply(Math, temp);
  var key = sortDiv.indexOf(val);
  sortA.push(a[key]);
  sortB.push(b[key]);

  if (key > -1)
temp.splice(key, 1);
}
console.log(sortA + " " + sortB);

I got [9,8] for a and [4,3] for b..while I want a=[9,8,7,6] b=[1,2,3,4] But splice is not a good option..I need a function that remove only element not an index..any idea please?

UPDATED As problem is solved but I want to know that Is it possible to remove element but not an index in array?

@HeemanshuBhalla Yes, I would comment the same thing. Also remove all the unnecessary code to be more specific. — developer033
– developer033, Commented Feb 25, 2016 at 5:33
@HeemanshuBhalla I have updated my question please check it out — Dhara
– Dhara, Commented Feb 25, 2016 at 5:36
check out this stackoverflow link stackoverflow.com/questions/17387571/… — Rajesh Jangid
– Rajesh Jangid, Commented Feb 25, 2016 at 6:22

Rajesh Jangid · Accepted Answer · 2016-02-25 05:54:21Z

1

Try not removing element just replacing it with maximum element +1 and it will work fine here is the updated code

var a = [6, 7, 8, 9];
var b = [1, 2, 3, 4];

var sortA = [],
  sortB = [],
  sortDiv = [];
var div = a[0] / b[0];
for (var i = 0; i < a.length; i++) {
  sortDiv.push(a[i] / b[i]);
}
console.log(sortDiv);

var temp = sortDiv;
var max = Math.max.apply(Math, temp);  // here we find the maximum
max += 1;
for (var i = 1; i <= sortDiv.length; i++) {
  var val = Math.min.apply(Math, temp);
  console.log(val);
  var key = sortDiv.indexOf(val);
  sortA.push(a[key]);
  sortB.push(b[key]);
  temp[key] = max;   // here we update the minimum with maximum+1
}
console.log(sortA + " " + sortB);

edited Feb 25, 2016 at 5:54

answered Feb 25, 2016 at 5:46

Rajesh Jangid

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3 Comments

Dhara Over a year ago

Isn't it possible with splice? can we remove element from array not an index ?

Rajesh Jangid Over a year ago

using splice changes indexes of elements after one iteration hence we cannot use splice here

Rajesh Jangid Over a year ago

don't know exactly but i think it is not possible to remove element with keeping the index undefined

Adrian Lynch · Accepted Answer · 2016-02-25 05:15:46Z

0

If the question is about using splice to remove an item based on the value and not the index, get the index, then use splice:

var a = ['a', 'b', 'c'];
a.splice(a.indexOf('b'), 1);
console.log(a); // ["a", "c"]

answered Feb 25, 2016 at 5:15

Adrian Lynch

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3 Comments

Dhara Over a year ago

I have used splice but it doesnot give an appropriate result

Adrian Lynch Over a year ago

'appropriate' or 'correct'? Are you trying to remove your use of slice, correct your use of splice, or something else?

Dhara Over a year ago

yeah I meant correct..I didnot get my answer as I want..I do not know splice is correct method to use or not

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