Menu
An array literal is a list of zero or more expressions, each of which represents an array element, enclosed in square brackets ( [] ). When you create an array using an array literal, it is initialized with the specified values as its elements, and its length is set to the number of arguments specified.
Declaring Arrays:typeName variableName[size]; This declares an array with the specified size, named variableName, of type typeName. The array is indexed from 0 to size-1. The size (in brackets) must be an integer literal or a constant variable.
(In essence, the [] is used when declaring a variable of array type, or when indexing into it -- e.g. items[0] or items[items.
A string can be represented by an array of symbols. Explanation : In C language the string is represented as an array of characters because C language does not support strings as a data type.
Yes! This is possible now in Ruby 2.0.0. One way to write it is:
%i{foo bar} # => [:foo, :bar]
You can also use other delimiters, so you could also write %i(foo bar) or %i!foo bar! for example.
This feature was originally announced here:
http://www.ruby-lang.org/zh_TW/news/2012/11/02/ruby-2-0-0-preview1-released/
It is mentioned in the official documentation of Ruby here:
http://ruby-doc.org/core/doc/syntax/literals_rdoc.html#label-Percent+Strings
In Ruby 1.x, unfortunately the list of available %-delimiters is limited
Modifier Meaning
%q[ ] Non-interpolated String (except for \\ \[ and \])
%Q[ ] Interpolated String (default)
%r[ ] Interpolated Regexp (flags can appear after the closing delimiter)
%s[ ] Non-interpolated Symbol
%w[ ] Non-interpolated Array of words, separated by whitespace
%W[ ] Interpolated Array of words, separated by whitespace
%x[ ] Interpolated shell command
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With