javascript search array, return found keys

Question

I am trying to search for a value in an array and return the found keys with values.

Example:

var arr=['Volvo460', 'Fiat500', 'fiat400', 'volvo C7', 'Saab 95'];
var search = 'volvo';

expected result:

returned_array = ['Volvo460','volvo C7'];

Anyone?

Edit - conformed array ;-)

doesn't this simply boil down to a linear search, else use JS objects. — Pbd
– Pbd, Commented May 3, 2016 at 17:54

SiddP · Accepted Answer · 2016-05-03 18:11:36Z

3

Hope this answers:

var arr=['Volvo460', 'Fiat500', 'fiat400', 'volvo C7', 'Saab 95'];
var search = 'volvo';

var returned_array =arr.filter(function(itm,i,a){
  if(itm.toLowerCase().indexOf(search) > -1)
    return i==a.indexOf(itm);
});

alert(returned_array);

Here is an working example.

answered May 3, 2016 at 18:11

SiddP

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Comments

Pranav C Balan · Accepted Answer · 2016-05-03 18:18:15Z

2

You can use filter() for filtering values from an array

var arr = [
  'Volvo460',
  'Fiat500',
  'fiat400',
  'volvo C7',
  'Saab 95'
];
var search = 'volvo';

var res = arr.filter(function(v) {
  // convert both string to lower to make it case insensitive
  return v.toLowerCase().indexOf(search.toLowerCase()) > -1;
});

document.write('<pre>' + JSON.stringify(res, null, 3) + '</pre>')

edited May 3, 2016 at 18:18

answered May 3, 2016 at 17:56

Pranav C Balan

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2 Comments

Carl Edwards Over a year ago

Don't you have you're parameters mixed up in your forEach call?

osomanden Over a year ago

What if it just is an as described? (eg. not objectified..)

Pbd · Accepted Answer · 2016-05-03 17:58:37Z

1

var arr = [
   'Volvo460',
   'Fiat500',
   'fiat400',
   'volvo C7',
   'Saab 95'
];
var search = 'volvo',

arr.map(function(v) {
  if(v.toLowerCase().indexOf(search.toLowerCase()) > -1) return v;
});

answered May 3, 2016 at 17:58

Pbd

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1 Comment

osomanden Over a year ago

Thanks. Seems though that the returned array is filled with empty "spaces" alert(result) -> customer_id,customer_name,customer_finance_id,,,, Notice the four commas..

Nelson Teixeira · Accepted Answer · 2016-05-03 18:19:36Z

try this:

var obj = {
  1: 'Volvo460',
  2: 'Fiat500',
  3: 'Fiat400',
  4: 'volvo C7',
  5: 'Saab 95'
};
var search = 'volvo'
for (key in obj) {  
    if (obj[key].toLowerCase().search(search) == 0)
        console.log('found:' + key + '=' + obj[key])
}

the keys can be strings also:

var obj = {
  'a': 'Volvo460',
  'b': 'Fiat500',
  'c': 'Fiat400',
  'd': 'volvo C7',
  'e': 'Saab 95'
};
var search = 'volvo'
for (key in obj) {  
    if (obj[key].toLowerCase().search(search) == 0)
        console.log('found:' + key + '=' + obj[key])
}

if you need to add one key at a time you can do like this:

var obj = {};
obj['a'] = 'Volvo460';
obj['b'] = 'Fiat500',
obj['c'] = 'Fiat400',
obj['d'] = 'volvo C7',
obj['e'] = 'Saab 95'

var search = 'volvo'
for (key in obj){   
    if (obj[key].toLowerCase().search(search) == 0)
        console.log('found:' + key + '=' + obj[key])
}

Working example here: https://jsfiddle.net/Lfpk6zgo/5/

Nina Scholz · Accepted Answer · 2016-05-03 18:22:54Z

1

A proposal with a regular expression

var arr = ['Volvo460', 'Fiat500', 'fiat400', 'volvo C7', 'Saab 95'];
    search = RegExp('volvo', 'i'),
    result = arr.filter(search.test.bind(search));

document.write('<pre>' + JSON.stringify(result, 0, 4) + '</pre>');

answered May 3, 2016 at 18:22

Nina Scholz

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Comments

Hlawuleka MAS · Accepted Answer · 2016-05-03 18:53:47Z

1

var arr = ["volvoCar", "123volvo", "BMW", "VW", "etc"],
new_array = [];

for(var i = 0;i<arr.length;i++){
    if(arr[i].match(/volvo/ig)){
      new_array.push(arr[i]);
   }

}
console.log(new_array);

answered May 3, 2016 at 18:53

Hlawuleka MAS

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