Removing specific values from array with some condition using jQuery

Question

I have below array

    var myArr = [
"01;#Sion",
"02;#Sion",
"03;#Mumbai",
"04;#Mumbai",
"05;#Kolkata",
"06;#Kolkata",
"07;#Chennai",
"08;#Chennai"
];

I need output in array as:

["01;#Sion", "03;#Mumbai", "05;#Kolkata", "07;#Chennai"]

It should select only unique values after ;# .

For Sion, output can be "01;#Sion" or "02;#Sion". Any of them is fine.

This is what I have tried so far:

var myArr = ["01;#Sion", "02;#Sion", "03;#Mumbai", "04;#Mumbai", "05;#Kolkata", "06;#Kolkata", "07;#Chennai", "08;#Chennai"];
var newArr = [];

for (j = 0; j < myArr.length; j++) {
    newArr.push(myArr[j].split(";#")[1]);
}

newArr = NWF$.unique(newArr);

console.log(newArr); // -> ["Chennai", "Kolkata", "Mumbai", "Sion"]

Of course it will - they ARE all unique. You need to do some string-handling, processing. If you show an effort, people are more likely to help. — Mitya
– Mitya, Commented Feb 11, 2017 at 13:43
$.unqiue(): "Sorts an array of DOM elements, in place, with the duplicates removed. Note that this only works on arrays of DOM elements, not strings or numbers." — Andreas
– Andreas, Commented Feb 11, 2017 at 13:44
I tried splitting each value by ;# and then I got unique values, but, afterwards stuck how to add either '01' or '02' to the 'Sion' value in code. — foodiepanda
– foodiepanda, Commented Feb 11, 2017 at 13:46

Rahul · Accepted Answer · 2017-02-11 14:35:15Z

1

Here is your solution mate,

var myArr = ["01;#Sion", "02;#Sion", "03;#Mumbai", "04;#Mumbai", "05;#Kolkata", "06;#Kolkata", "07;#Chennai", "08;#Chennai"];
var newArr = [];
var tempArr = [];
for (j = 0; j < myArr.length; j++) {
    newArr.push(myArr[j].split(";#")    [1]);
    tempArr.push(myArr[j]);
}
var temp = '';
var result = [];
for(i=0;i<newArr.length;i++){
    if(temp == '' || temp != newArr[i]){
       temp = newArr[i];
       result.push(tempArr[i]);
    }
}

console.log(result);

Here is working jsfiddle

Give it a try, it will work.

answered Feb 11, 2017 at 14:35

Rahul

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Comments

charlietfl · Accepted Answer · 2017-02-11 14:36:33Z

1

One of the easiest ways to do something like this is create a temporary object where the property names are the values you want to compare.

For your case, if a property doesn't exist yet you add it otherwise you skip it

Once object is complete, iterate all it's properties to create new array

var myArr = [
   "01;#Sion",
   "02;#Sion",
   "03;#Mumbai",
   "04;#Mumbai",
   "05;#Kolkata",
   "06;#Kolkata",
   "07;#Chennai",
   "08;#Chennai"
 ];

 var tmp = {};
 myArr.forEach(function(el) {
   var city = el.split('#')[1];
   if (!tmp[city]) {
     tmp[city] = el;
   }
 });

 console.log('tmp', tmp); 

 var newArr = Object.keys(tmp).map(function(key) {
   return tmp[key];
 });

 console.log('newArr', newArr)

answered Feb 11, 2017 at 14:36

charlietfl

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