I write this post as my first blog because I failed my first assessment. I am frustrated first, then I thought, yes, there must be something that I don’t understand very well. So I spend an afternoon to figure out what’s going wrong. I found there are few things that I mess up.

1. variable and objects
2. inner scope/ outer scope
3. method mutate/non-mutate
4. true and evaluate to be true

I do pretty much exercise without understanding easy but important concepts. I am glad that I figure it out now. I am never aware that I do not understand all of this at all.

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