CODEWITHSUNDEEP
javascriptarrays
Kallewallex
Kallewallex

Reputation: 521

Use variable/parameter as array identifier

If I enter the array identifiers manually it will work, however using the parameters in the function it won't work. I know where the problem is, but not what I can replace ".key" with, so that it'll use the parameters value. 

var stuff = [
 { "name": "Alex", "food": "Pizza"},
 { "name": "Karl", "food": "Lasagne"},
 { "name": "Franz", "food": "Potato salad"}
]

function getSpecificValue(key, value, getkey, arr) {
    for (var i=arr.length;i--;) {
        if (arr[i].key == value) { //this should use the parameter "key" ("name")
            return arr[i].getkey; //this should use the parameter "getkey" ("food")
        }
    }
}

alert( getSpecificValue('name', 'Alex', 'food', stuff) ); //alert "Pizza"

Upvotes: 0

Views: 303

Answers (1)

dave
dave

Reputation: 64657

You can always access object properties using "bracket" or "array" notation:

for (var i=arr.length;i--;) {
    if (arr[i][key] == value) { //this should use the parameter "key" ("name")
        return arr[i][getkey]; //this should use the parameter "getkey" ("food")
    }
}

Upvotes: 1

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