How to add a value in a json subarray with jQuery?

How to add a value in a json subarray with jQuery ?

I has build this code but it dosen't work... The developer console tell me "Cannot call method 'push' of undefined"

function save(){
    var Arguments = [];
        var title = $(this).find('input[name=title]').val();

Thanks !


You need to declare it as on object which has an array as its pages property.

var Arguments = {pages: []};

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Java 8 convert Map<Department, List<Person>> to Map<Department, List<String>>

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Using Collectors.groupingBy() I can easily obtain a Map&lt;Department, List&lt;Person&gt;&gt; - this gives me all the Person objects that are part of a Department:

How do I draw a shape on an HTML5 video using SVG?

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I am trying to draw shapes on top of an HTML5 video, but am having trouble figuring out how to do it. I know how to apply a mask on top of the video:

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