use size_t instead of long in Array

[minggo]

1. use size_t instead of long in Array API
2. remove unneeded spaces
3. add spaces before and after binary operation, such as +

[minggo]

@ricardoquesada
Could you please review it?

[minggo]

I will add other commit after this one is merged.

[minggo]

I will change the API first, then fix warnings later.

[ricardoquesada]

Sure. I'll review tomorrow Tuesday.

[minggo]

I am not sure if i use too much size_t. May be only count and capacity should use size_t.

[ricardoquesada]

@minggo
Looks good to me.

You are using size_t for size and index, and that is the expected use:
http://stackoverflow.com/a/1951548

[minggo]

Ok.

[minggo]

I change the type of Array::getIndexOfObject() to size_t, then what's the return value when the object is not contained in the Array?

[minggo]

Ok, i can return the max value of size_t.

[ricardoquesada]

Good point.

2 options:

• return std::max() or something like that
• or assert() if the object doesn't exist

[minggo]

Thanks. Since we will return ssize_t instead of size_t, i think it can return -1.