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Iterate through a C++ Vector using a 'for' loop

I am new to the C++ language. I have been starting to use vectors, and have noticed that in all of the code I see to iterate though a vector via indices, the first parameter of the for loop is always something based on the vector. In Java I might do something like this with an ArrayList: ...
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Is there any way to use a numeric type as an object key?

It seems that when I use a numeric type as a key name in an object, it always gets converted to a string. Is there anyway to actually get it to store as a numeric? The normal typecasting does not seem to work. ...
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Why use Ruby's attr_accessor, attr_reader and attr_writer?

Ruby has this handy and convenient way to share instance variables by using keys like 5 Answers ...
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iOS - forward all touches through a view

I have a view overlayed on top of many other views. I am only using the overaly to detect some number of touches on the screen, but other than that I don't want the view to stop the behavior of other views underneath, which are scrollviews, etc. How can I forward all the touches through this overlay...
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TypeError: unhashable type: 'dict'

This piece of code is giving me an error unhashable type: dict can anyone explain me what is the solution 2 Answers ...
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How to play with Control.Monad.Writer in haskell?

I'm new to functional programming and recently learning at Learn You a Haskell , but when I went through this chapter , I got stuck with the program below: ...
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JavaScript: How to pass object by value?

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Assembly code vs Machine code vs Object code?

What is the difference between object code, machine code and assembly code? 10 Answers ...
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What's the difference between git reflog and log?

The man page says that log shows the commit logs and reflog manages reflog information. What exactly is reflog information and what does it have that the log doesn't? The log seems far more detailed. ...
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Set element focus in angular way

After looking for examples of how set focus elements with angular, I saw that most of them use some variable to watch for then set focus, and most of them use one different variable for each field they want to set focus. In a form, with a lot of fields, that implies in a lot of different variables. ...