Why does ARGF#binmode removed/suppressed the fitst element from ARGV?

ruby-talk
1

I have been introduced to the class `ARGF` today. I was trying each of
the methods of this class to see how they work. Doing so below sample
made me confused.

File name: `true.rb` contains the below code-

    p "welcome to the ARGF and ARGV learning script"
    p ARGV
    p ARGF.argv
    ARGF.argv.shift
    p ARGF.argv
    p ARGF.binmode?
    ARGF.binmode
    # Why `binmode` method call removing first item from the ARGV array.
    p ARGF.argv
    p ARGF.binmode?
    ARGV.shift
    p ARGF.read

when I ran the below from the command prompt:

    D:\Rubyscript\My ruby learning days>ruby true.rb --verbrose a.txt
b.txt c.txt

*Output:*

    "welcome to the ARGF and ARGV learning script"
    ["--verbrose", "a.txt", "b.txt", "c.txt"]
    ["--verbrose", "a.txt", "b.txt", "c.txt"]
    ["a.txt", "b.txt", "c.txt"]
    false
    ["b.txt", "c.txt"]
    true
    "HI! I am in \"a.txt\"\r\nLet's start to read the file here.Hi! I am
in \"c.txt\"."

···

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