Search if multiple values exist in array

Question

I have an array 'iid_nn' which will contain ~ 50 values.

If iid_nn contains either 13652 or 39855, then var somevar = 'cabbages' else var somevar = 'carrots'.

If checking for one of those values I could do

if(iid_nn.indexOf(13652) >=0) {
    var somevar = 'cabbages';
} else if(iid_nn.indexOf(39855) >=0) {
    {var somevar = 'cabbages';
} else {
    var somevar = 'carrots';}

But can I do something like

if(iid_nn.indexOf(13652||39855) >=0) {
    var somevar = 'cabbages';
} else {
    var somevar = 'carrots';
}

Langdon · Accepted Answer · 2015-06-30 17:10:37Z

2

You can either modify your indexOf conditional to be:

if (iid_nn.indexOf(13652) > -1 || iid_nn.indexOf(39855) > -1) {

Or you can try using array.some.

if (iid_nn.some(function(i) { return i === 13652 || i === 39855; }) === true) {

answered Jun 30, 2015 at 17:10

Langdon

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Comments

Ry- · Accepted Answer · 2015-06-30 17:11:33Z

2

You can’t pass one value to indexOf that will cause it to search for multiple values. You can use the || operator normally, though:

var somevar;

if (iid_nn.indexOf(13652) >= 0 || iid_nn.indexOf(39855) >= 0) {
    somevar = 'cabbages';
} else {
    somevar = 'carrots';
}

And maybe create your own function to do it:

function containsAny(array, items) {
    return array.some(function (item) {
        return items.indexOf(item) !== -1;
    });
}

var somevar;

if (containsAny(iid_nn, [13652, 39855])) {
    somevar = 'cabbages';
} else {
    somevar = 'carrots';
}

answered Jun 30, 2015 at 17:11

Ry-♦

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Comments

Nikhil Aggarwal · Accepted Answer · 2015-06-30 17:12:00Z

0

To check index of multiple values, you need to update your code to following. Additionally, you can default the value to carrots and then on condition update it.

var somevar = 'carrots';

if(iid_nn.indexOf(13652) >= -1 || iid_nn.indexOf(39855) >= -1) {
    somevar = 'cabbages';
}

answered Jun 30, 2015 at 17:12

Nikhil Aggarwal

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Comments

Varun · Accepted Answer · 2015-06-30 17:12:13Z

0

Your condition is kind of wrong.

if(iid_nn.indexOf(39855)!=-1 || iid_nn.indexOf(13652)!=-1) 
{
    var somevar = 'cabbages';
} else {
    var somevar = 'carrots';
}

answered Jun 30, 2015 at 17:12

Varun

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Comments

Rayon · Accepted Answer · 2015-06-30 17:12:54Z

0

Try this:

if((iid_nn.indexOf(13652) !=-1)||(iid_nn.indexOf(39855) !=-1)) {
    var somevar = 'cabbages';
} else {
    var somevar = 'carrots';
}

answered Jun 30, 2015 at 17:12

Rayon

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Comments

Nina Scholz · Accepted Answer · 2015-06-30 17:14:22Z

0

var iid_nn = [13652],
    somevar;
if (~iid_nn.indexOf(13652) || ~iid_nn.indexOf(39855)) {
    somevar = 'cabbages';
} else {
    somevar = 'carrots';
}

answered Jun 30, 2015 at 17:14

Nina Scholz

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