Getting the size of an array in an object

JavascriptArraysObjectCount

Javascript Problem Overview

I would like some help with getting the size of an array inside an object:

var st = { "itema":{...},"itemb":[{"id":"s01","cd":"c01","dd":"d01",....}{"id":"s02","cd":"c02","dd":"d02",....}]}

How would you get a count of the objects inside "itemb" (in this case 2)?

Javascript Solutions

Solution 1 - Javascript

Javascript arrays have a length property. Use it like this:

st.itemb.length

Solution 2 - Javascript

Arrays have a property .length that returns the number of elements.

var st =
    {
        "itema":{},
        "itemb":
        [
            {"id":"s01","cd":"c01","dd":"d01"},
            {"id":"s02","cd":"c02","dd":"d02"}
        ]
    };

st.itemb.length // 2
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Content TypeOriginal AuthorOriginal Content on Stackoverflow
QuestionmeliView Question on Stackoverflow
Solution 1 - JavascriptAndrew HareView Answer on Stackoverflow
Solution 2 - JavascriptBrunoLMView Answer on Stackoverflow