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How to add an object to an array

How can I add an object to an array (in javascript or jquery)? For example, what is the problem with this code? 13 Answ...
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Why Would I Ever Need to Use C# Nested Classes [duplicate]

I'm trying to understand about nested classes in C#. I understand that a nested class is a class that is defined within another class, what I don't get is why I would ever need to do this. ...
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Convert a Python list with strings all to lowercase or uppercase

I have a python list variable that contains strings. Is there a python function that can convert all the strings in one pass to lowercase and vice versa, uppercase? ...
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How do you cast a List of supertypes to a List of subtypes?

For example, lets say you have two classes: 17 Answers 17 ...
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Javascript reduce on array of objects

Say I want to sum a.x for each element in arr . 15 Answers 15 ...
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Swapping two variable value without using third variable

One of the very tricky questions asked in an interview. 27 Answers 27 ...
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Sort array by firstname (alphabetically) in Javascript

I got an array (see below for one object in the array) that I need to sort by firstname using JavaScript. How can I do it? ...
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CSS '>' selector; what is it? [duplicate]

I've seen the "greater than" ( > ) used in CSS code a few times, but I can't work out what it does. What does it do? 7 A...
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What's this =! operator? [duplicate]

I was surprised by this code: 13 Answers 13 ...
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Multiple left-hand assignment with JavaScript

This is equivalent to this: 7 Answers 7 ...