I want to match two passwords with regular expression. For example I have two inputs "123456" and "1234567" then the result should be not match (false). And when I have entered "123456" and "123456" then the result should be match (true).
I couldn't make the expression. How do I do it?
This question is related to
regex
if you have a the input password in a variable and you want to match exactly 123456 then anchors will help you:
/^123456$/
in perl the test for matching the password would be something like
print "MATCH_OK" if ($input_pass=~/^123456$/);
EDIT:
bart kiers is right tho, why don't you use a strcmp() for this? every language has it in its own way
as a second thought, you may want to consider a safer authentication mechanism :)
In malfaux's answer '^' and '$' has been used to detect the beginning and the end of the text.
These are usually used to detect the beginning and the end of a line.
However this may be the correct way in this case.
But if you wish to match an exact word the more elegant way is to use '\b'. In this case following pattern will match the exact phrase'123456'.
/\b123456\b/
(?<![\w\d])abc(?![\w\d])
this makes sure that your match is not preceded by some character, number, or underscore and is not followed immediately by character or number, or underscore
so it will match "abc" in "abc", "abc.", "abc ", but not "4abc", nor "abcde"
You may also try appending a space at the start and end of keyword: /\s+123456\s+/i.
A more straight forward way is to check for equality
if string1 == string2
puts "match"
else
puts "not match"
end
however, if you really want to stick to regular expression,
string1 =~ /^123456$/
Source: Stackoverflow.com