ROR +通过使用红宝石代码检测另一个字符来替换最后一个字符

Question

Is it possible to detect the last character of string in ruby on rails and replace it by "". Explanation :: Suppose I have string as "demo-" then i have to check its last character, If it is "-" then replace it by "", otherwise no action should be taken.

Example - Code ::

search_text.downcase! if !search_text.nil?

now if seach_text have value as "demo-" then change it to "demo" by replacing "-".

Thanks in Advance !!!

Answer 1

Much simpler:

text.chomp!('-')

chomp already includes the if condition: if the character exists at the end of the string, it is removed.

Answer 2

> a = "abc-"
=> "abc-"
>> a.chop! if a[-1] == 45 # if last character is a minus sign chop it off
=> 45
>> a
=> "abc"

Answer 3

try the following

text.chop! if text[text.length-1,1] == "-"

text.chop! removes the last character and saves it to the same object