instance method
at
Ruby on Rails edge
Since v3.0.20Signature
at(position)If you pass a single integer, returns a substring of one character at that
position. The first character of the string is at position 0, the next at
position 1, and so on. If a range is supplied, a substring containing
characters at offsets given by the range is returned. In both cases, if an
offset is negative, it is counted from the end of the string. Returns `nil`
if the initial offset falls outside the string. Returns an empty string if
the beginning of the range is greater than the end of the string.
```
str = "hello"
str.at(0) # => "h"
str.at(1..3) # => "ell"
str.at(-2) # => "l"
str.at(-2..-1) # => "lo"
str.at(5) # => nil
str.at(5..-1) # => ""
```
If a Regexp is given, the matching portion of the string is returned.
If a String is given, that given string is returned if it occurs in
the string. In both cases, `nil` is returned if there is no match.
```
str = "hello"
str.at(/lo/) # => "lo"
str.at(/ol/) # => nil
str.at("lo") # => "lo"
str.at("ol") # => nil
```: (Integer | Range | Regexp | String) -> String?
Parameters
-
positionreq
Source
# File activesupport/lib/active_support/core_ext/string/access.rb, line 34
def at(position)
self[position]
end
Defined in activesupport/lib/active_support/core_ext/string/access.rb line 34
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Defined in String