How to sort an array of Strings in Jquery with any specific sort order given

Question

I have and array of strings:

var arrStr = ["Ron", "Jhon", "Mary", "Alex", "Ben"];

The above array is the default sort order that I require. I have another array of Strings:

var arrStr2 = ["Mary", "Alex", "Jhon"];

I wanted to sort arrStr2 with the sort order in arrStr. (the order in arrStr also can be changed, accordingly the arrStr2 should be sorted). arrStr2 can have more values also, but the values will be only from any of the values in array arrStr

After sorting I need an out put for arrStr2 as ["Jhon","Mary","Alex"];

How can I achieve this using jQuery?

do you have a case where arrStr2 may have duplicates?

gurvinder372
– gurvinder372

2016-03-24 11:58:45 +00:00
Commented Mar 24, 2016 at 11:58 — gurvinder372
– gurvinder372, Commented Mar 24, 2016 at 11:58

georg · Accepted Answer · 2016-03-24 11:42:20Z

1

Just compute the intersection, no need to sort():

var arrStr = ["Ron", "Jhon", "Mary", "Alex", "Ben"];
var arrStr2 = ["Mary", "Alex", "Jhon"];

result = arrStr.filter(x => arrStr2.includes(x))

document.write('<pre>'+JSON.stringify(result,0,3));

(ES5 backporting left as an exercise).

answered Mar 24, 2016 at 11:42

georg

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gurvinder372 Over a year ago

Assuming that it is left as an exercise for everyone (not only OP) :) ES5 would be arrStr2 = arrStr.filter(function(value) { return arrStr2.indexOf(value) > -1; })

gurvinder372 · Accepted Answer · 2016-03-24 11:50:06Z

1

After sorting I need an out put for arrStr2 as ["Jhon","Mary","Alex"];

simply try this

arrStr2.sort(function(a,b){ return arrStr.indexOf(a) - arrStr.indexOf(b) });

Now arrStr2 will have the value you are expecting,

DEMO

var arrStr = ["Ron", "Jhon", "Mary", "Alex", "Ben"];

var arrStr2 = ["Mary", "Alex", "Jhon"];

arrStr2.sort(function(a,b){ return arrStr.indexOf(a) - arrStr.indexOf(b) });

document.body.innerHTML = JSON.stringify( arrStr2, 0, 4 );

edited Mar 24, 2016 at 11:50

answered Mar 24, 2016 at 11:34

gurvinder372

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1 Comment

Sai Over a year ago

Thanks !. It does the sorting, but the result is a JSON and that is which is converted to String. Now the new array which I get are having all values with extra spaces appended, which I do not need.

Dhananjaya Kuppu · Accepted Answer · 2016-03-24 11:45:34Z

0

This is one more approach:

var rank = {};
arrStr.forEach(function(e, i){rank[e] = i;});
arrStr2.sort(function(a, b) {return rank[a] - rank[b];});

answered Mar 24, 2016 at 11:45

Dhananjaya Kuppu

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