How can I iterate through a javascript array and call a function that updates the same array?

Question

I have this array:

var test.qs =
[
 {"answer":null,
  "testQuestionId":710
  "synchronized":true},
 {"answer":null,
  "testQuestionId":711
  "synchronized":false
]

I would like to call a function on all the array objects that have the syncronized property equal to false like this:

if (!test.qs[x].synchronized) {
    httpPutTestQuestion(number)
    .success(function (data) {
        test.qs[x].synchronized = true;
    })
}

But how can I do this as if I put this into a for loop then when the function returns I won't still have the value x?

You missed the closing brace for second array record, just FYI :) — Mohammad Aftab Uddin
– Mohammad Aftab Uddin, Commented Jul 20, 2014 at 11:56
... and a couple of commas. Also var test.qs is not valid javascript. — HBP
– HBP, Commented Jul 20, 2014 at 12:14

Mritunjay · Accepted Answer · 2014-07-20 11:42:14Z

1

I think this should work for you.

test.qs.forEach(function (q) {
if (!q.synchronized) {
    httpPutTestQuestion(number)
    .success(function (data) {
        q.synchronized = true;
    })
}
})

answered Jul 20, 2014 at 11:42

Mritunjay

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Comments

thefourtheye · Accepted Answer · 2014-07-20 11:44:59Z

1

Why don't you use the plain old loop, like this

var i;
for (i = 0; i < qs.length; i += 1) {
    if (qs[i].synchronized === false) {
        httpPutTestQuestion(number)
            .success(function (data) {
                test.qs[x].synchronized = true;
            })
        };
    }
}

You can get the length of the array with the length property. Also note that, the variable names inJavaScript cannot have . in them. So,

var test.qs = ....

will fail.

answered Jul 20, 2014 at 11:44

thefourtheye

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