JavaScript Check if array using categories contains string

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, Dec 04 '17 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, Dec 04 '17 at 21:28

score 1 · Accepted Answer · answered Dec 04 '17 at 21:10

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 04 '17 at 21:10

CRice

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Yes this works :) Thanks dude – Nhoward292 Dec 04 '17 at 21:27

Piotr Białek · Answer 2 · 2017-12-04T21:35:53.163

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 04 '17 at 21:35

answered Dec 04 '17 at 21:10

Piotr Białek

2,569
1
17
26

2

Why use `find` and not use its return value (properly). Use `some` for checking, and `find` for actual finding. – ibrahim mahrir Dec 04 '17 at 21:12
This was returning an error saying that the { in the if statement wasn't valid. – Nhoward292 Dec 04 '17 at 21:27
@nathanial292 updated, i forgot one ")". – Piotr Białek Dec 04 '17 at 21:29
Do you know how to then get the matching value in the array. Where the string matches the name? – Nhoward292 Dec 04 '17 at 21:34
array.find(a => a.name === value); – Piotr Białek Dec 04 '17 at 21:36

JavaScript Check if array using categories contains string

2 Answers2