javascript match a string from list of url in array and get that value

Question

I have a variable as var input = 'promojam-untitled-promotion-2'; and an array

var prefferedPatterns = [
  "https://promojam.live.promojam.dev:5000/promojam-untitled-promotion-2",
  "http://promojam.live.promojam.dev:5000/promojam-untitled-promotion-3",
  "http://promojam.live.promojam.dev:5000/promojam-untitled-promotion-4",
  "http://promojam.live.promojam.dev:5000/promojam-untitled-promotion-5",
  "http://promojam.live.promojam.dev:5000/promojam-untitled-promotion-6",
  "http://promojam.live.promojam.dev:5000/promojam-untitled-promotion-7",
  "http://promojam.live.promojam.dev:5000/promojam-untitled-promotion-8",
  "http://promojam.live.promojam.dev:5000/promojam-untitled-promotion-9"
]

I have to find the matched input element from this array. any idea ?

Have you tried anything? for, indexOf, filter, RegEx, ... — Tushar
– Tushar, Commented Jan 19, 2016 at 10:32

Rajesh Dixit · Accepted Answer · 2016-01-19 10:37:39Z

You will have to loop through array and search input in current value using indexOf().

Following is a sample code using .filter()

var input = 'promojam-untitled-promotion-2';

var prefferedPatterns = [
  "https://promojam.live.promojam.dev:5000/promojam-untitled-promotion-2",
  "http://promojam.live.promojam.dev:5000/promojam-untitled-promotion-3",
  "http://promojam.live.promojam.dev:5000/promojam-untitled-promotion-4",
  "http://promojam.live.promojam.dev:5000/promojam-untitled-promotion-5",
  "http://promojam.live.promojam.dev:5000/promojam-untitled-promotion-6",
  "http://promojam.live.promojam.dev:5000/promojam-untitled-promotion-7",
  "http://promojam.live.promojam.dev:5000/promojam-untitled-promotion-8",
  "http://promojam.live.promojam.dev:5000/promojam-untitled-promotion-9"
]

var output = prefferedPatterns.filter(function(item){
  return (item.indexOf(input)>0)
})

console.log(output);

Makwana Ketan · Accepted Answer · 2016-01-19 10:45:01Z

Try this.

var input = 'promojam-untitled-promotion-2';
var prefferedPatterns = [
    "https://promojam.live.promojam.dev:5000/promojam-untitled-promotion-2",
    "http://promojam.live.promojam.dev:5000/promojam-untitled-promotion-3",
    "http://promojam.live.promojam.dev:5000/promojam-untitled-promotion-4",
    "http://promojam.live.promojam.dev:5000/promojam-untitled-promotion-5",
    "http://promojam.live.promojam.dev:5000/promojam-untitled-promotion-6",
    "http://promojam.live.promojam.dev:5000/promojam-untitled-promotion-7",
    "http://promojam.live.promojam.dev:5000/promojam-untitled-promotion-8",
    "http://promojam.live.promojam.dev:5000/promojam-untitled-promotion-9"
     ]
      for (var i = 0; i < prefferedPatterns.length; i++) {
        if (prefferedPatterns[i].indexOf(input) > -1) {
        alert(prefferedPatterns[i]);
      }
     }

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