From: maven apache <apachemaven0@...>
Date: 2012-02-12T21:36:42+09:00
Subject: the ruby syntax

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Hi:

I like ruby the first time I read its document.

However then I found that the syntax is too fliexible to learn it.

For example:

The IO.open method,this is the api page:
http://ruby-doc.org/core-1.9.3/IO.html#method-c-new

 This is the argument of this method:

new(fd [, mode] [, opt])

I am confused by the third argument-'opt'.

Is its type is 'hash'??

If so I think this is the way to call it:

IO>new("data.txt", "w",{:encoding=>'xxx',:autoclose=>true...})

But I found so many people call it like this:

IO.new("data.txt", mode: 'w:UTF-16LE', cr_newline: true)

What does this mean?

'data.txt' is the first argument. How about the others?  which is the
second? and which is the third?

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BTW, the above is just an example,in fact I found so many syntax that I can
not understand.

So I wonder if there is any documents cover all of ruby's *fiexible* syntax?

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