Sort an array except one element in JavaScript

Question

I have an array and I am sorting it but I need to sort everything except one element of my array.

My array is:

var Comparison = [
    {key: \"None\", val         


        

Answer 1

Not fancy, but a pretty straightforward way of doing this is to just remove the special element, sort the array, and insert the special to whatever index you want.

var Comparison = [{ key: "None", value: "None" }, { key: "Geographical Area",value: "Geographical_Area" }, { key: "Forests", value: "Forests" }, { key: "Barren Unculturable Land", value: "Barren_Unculturable_Land" }, { key: "Land put to Non agricultural use", value: "Land_put_to_Non_agricultural_use" }, { key: "Land Area", value: "Land_Area" }, { key: "Water Area", value: "Water_Area" }, { key: "Culturable Waste", value: "Culturable_Waste" }, { key: "Permanent Pastures", value: "Permanent_Pastures" }, { key: "Land under Tree Crops", value: "Land_under_Tree_Crops" }, { key: "Fallow Land excl Current Fallow", value: "Fallow_Land_excl_Current_Fallow" }, { key: "Current Fallow", value: "Current_Fallow" }, { key: "Total Unculturable Land", value: "Total_Unculturable_Land" }, { key: "Net Sown Area", value: "Net_Sown_Area" }, { key: "Gross Sown Area", value: "Gross_Sown_Area" }, { key: "Cropping Intensity", value: "Cropping_Intensity" },];

const idx = Comparison.findIndex(a => a.key === 'None');
const none = Comparison.splice(idx, 1);
Comparison.sort((a, b) => a.key.localeCompare(b.key));
Comparison.splice(0,0, none[0]);

console.log(Comparison);

To avoid no special or multiple special element issues:

var Comparison = [{ key: "None", value: "None" }, { key: "Geographical Area",value: "Geographical_Area" }, { key: "Forests", value: "Forests" }, { key: "Barren Unculturable Land", value: "Barren_Unculturable_Land" }, { key: "Land put to Non agricultural use", value: "Land_put_to_Non_agricultural_use" }, { key: "Land Area", value: "Land_Area" }, { key: "Water Area", value: "Water_Area" }, { key: "Culturable Waste", value: "Culturable_Waste" }, { key: "Permanent Pastures", value: "Permanent_Pastures" }, { key: "Land under Tree Crops", value: "Land_under_Tree_Crops" }, { key: "Fallow Land excl Current Fallow", value: "Fallow_Land_excl_Current_Fallow" }, { key: "Current Fallow", value: "Current_Fallow" }, { key: "Total Unculturable Land", value: "Total_Unculturable_Land" }, { key: "Net Sown Area", value: "Net_Sown_Area" }, { key: "Gross Sown Area", value: "Gross_Sown_Area" }, { key: "Cropping Intensity", value: "Cropping_Intensity" },];

const obj = Comparison.reduce((acc, a) => {
  if (a.key === 'None') {
    acc.f.push(a);
  } else {
    const idx = acc.s.findIndex(b => b.key.localeCompare(a.key) > 0);
    acc.s.splice(idx === -1 ? acc.s.length : idx, 0, a);
  }
  return acc;
}, { f: [], s: [] });

const res = obj.f.concat(obj.s);

console.log(res);