JavaScript Check if array using categories contains string [duplicate]

Question

I have an array containing the following data.

[ { name: 'hello', value: 'Bot hello!' },
  { name: 'help', value: 'Print help sheet.' },
  { name: 'kick', value: 'Kicks a user.' },
  { name: 'ping', value: 'Check the bot\'s Connection' },
  { name: 'roll', value: 'Roll a die.' } ]

var str = "ping"
if (str == //One of the names in the array){
   //Do stuff

}

How can I create a function to check whether a string such as "ping" is equal to one of the values in the "name:" category? I want this to be dynamic so if the string is equal to "roll" it will flag that roll is in the array.

You can use Array#some like this: if(arr.some(o => o.name === str)) { ... }. — ibrahim mahrir
– ibrahim mahrir, Commented Dec 4, 2017 at 21:09
Sorry. I tried searching however I couldn't find anything for using sub arrays. Anyway the example provided in the one you linked works. Thanks — Nhoward292
– Nhoward292, Commented Dec 4, 2017 at 21:28

CRice · Accepted Answer · 2017-12-04 21:10:17Z

1

In ES6:

var data = [ { name: 'hello', value: 'Bot hello!' },
  { name: 'help', value: 'Print help sheet.' },
  { name: 'kick', value: 'Kicks a user.' },
  { name: 'ping', value: 'Check the bot\'s Connection' },
  { name: 'roll', value: 'Roll a die.' } ]
  
var str = "ping"

console.log(data.some(x => x.name === str))

answered Dec 4, 2017 at 21:10

CRice

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1 Comment

Nhoward292 Over a year ago

Yes this works :) Thanks dude

Piotr Białek · Accepted Answer · 2017-12-04 21:35:53Z

0

You could use native array method some

function contain(array, value) {
  return array.some(a => a.name === value);
}
if (contain(array, 'ping')){
   //Do stuff

}

edited Dec 4, 2017 at 21:35

answered Dec 4, 2017 at 21:10

Piotr Białek

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5 Comments

ibrahim mahrir Over a year ago

Why use find and not use its return value (properly). Use some for checking, and find for actual finding.

Nhoward292 Over a year ago

This was returning an error saying that the { in the if statement wasn't valid.

Piotr Białek Over a year ago

@nathanial292 updated, i forgot one ")".

Nhoward292 Over a year ago

Do you know how to then get the matching value in the array. Where the string matches the name?

Piotr Białek Over a year ago

array.find(a => a.name === value);

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