Select element inside array [duplicate]

Question

let's say I have something like this:

var SucessList = [
 {
  id: 1,
  dedicated: true
 },
 {
  id: 2,
  dedicated: false
 }
];

and I want to make an if function to check if dedicated == true. How do i select dedicated to use like that?

even easier than in the dupe. SuccessList.filter(v => v.dedicated); — baao
– baao, Commented Jan 31, 2017 at 18:04
other methods available also depending on use case, which is not clear at all in question — charlietfl
– charlietfl, Commented Jan 31, 2017 at 18:05
@charlietfl what do you mean by that? I intend to use an if else statement that checks if dedicated is true and give me a link and if false, gives me a different link. As said in other comment, I'm very new to js and it seems to me like a simple straight forward question. I guess I was wrong — jay.pepper
– jay.pepper, Commented Jan 31, 2017 at 18:59
well one case might be you only want to know if any of them are true and simply have a yes/no answer, or as in your case return specific data where that property is true. you didn't specify what expected results were — charlietfl
– charlietfl, Commented Jan 31, 2017 at 19:02
@charlietfl I did not know it was relevant, but yes, that is exactly what I want — jay.pepper
– jay.pepper, Commented Jan 31, 2017 at 19:17

guest271314 · Accepted Answer · 2017-01-31 18:05:05Z

1

let res = SucessList.filter(({dedicated}) => dedicated);

answered Jan 31, 2017 at 18:05

guest271314

1

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6 Comments

Jonas Wilms Over a year ago

side note: dont use this in a productional environment (ES6 isnt supported by some browsers)

jay.pepper Over a year ago

Okay, let's assume I don't understand much about js, what do I do with that and how do I make my if else statement to check if dedicated it's true or false?

guest271314 Over a year ago

@jay.pepper ({dedicated}) pattern destructures current object to set identifier dedicated to the value of the dedicated property of that object. .filter() returns the element where true is return value of callback function. If dedicated is true, the current object is returned within res array, else current object is not set as an element of resulting res array. For example let {dedicated} = { id: 1, dedicated: true }; console.log(dedicated).

guest271314 Over a year ago

@jay.pepper Does the description at previous comment help clarify the pattern utilized at Answer?

jay.pepper Over a year ago

I'm sorry, but even tho I'm sure you must be right, I don't have enough knowledge to fully understand your answer... I appreciate the effort very much

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