Lodash find a value within an array from an array of values

Question

I have the following array:

var data = [
    'Value1',
    'Value2',
    'Value3'
];

Using another array, how would I get a truthy value if a value was found within the data array?

var dataLookup = [
    'Value1',
    'Value2'
]

I know that in lodash I could do the following to look for a single value;

_.includes(data, 'Value1'); // true

I would like to pass an array of values to look for.

Nenad Vracar · Accepted Answer · 2016-05-18 21:27:46Z

2

You can use some() to check if one value from dataLookup is inside data and if it is it will return true if one isn't it will return false

var data = ['Value1','Value2','Value3'];
var dataLookup = ['Value1','Value2']

var result = dataLookup.some((e) => {return data.indexOf(e) != -1});
console.log(result)

edited May 18, 2016 at 21:27

answered May 18, 2016 at 21:16

Nenad Vracar

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5 Comments

Jonathan Lonowski Over a year ago

Lodash equivalent: var result = _.every(dataLookup, _.partial(_.includes, data));

stackunderflow Over a year ago

Thanks for that, however I just want to return true if one of the values from dataLookup exists within data.

Jonathan Lonowski Over a year ago

@KarlBateman You can use .some() in place of .every() for that.

stackunderflow Over a year ago

Thank you @NenadVracar for your time.

stackunderflow Over a year ago

@JonathanLonowski Thanks for that, please post that as an answer so I may accept.

ryeballar · Accepted Answer · 2016-05-19 11:40:45Z

0

You can make use of difference() and equal() to check if some values from the data array exists from the dataLookup array.

var found = !_.(data).difference(dataLookup).isEqual(data);

var data = [
    'Value1',
    'Value2',
    'Value3'
];

var dataLookup = [
    'Value1',
    'Value2'
];

var found = !_(data).difference(dataLookup).isEqual(data);

console.log(found);

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.12.0/lodash.js"></script>

edited May 19, 2016 at 11:40

answered May 19, 2016 at 5:52

ryeballar

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