How to check whether the user already exist in a log file or not?

Question

1.00/5 (1 vote)

See more:

I wrote a code to login box,now i need to add uniqueness to usernames..i tooked an array and stored all existing users data from file...i need to compare that,how i can compare a single variable with an array

Posted 20-Mar-15 0:23am

Member 11493554

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Sergey Alexandrovich Kryukov · Answer 1 · 2015-03-20T02:19:00

Instead of array, you can use a container which support uniqueness, for example
http://www.cplusplus.com/reference/unordered_map/unordered_map[^].
In you case, the user name should be used as a key, and all user information as a value (mapped) type T.

For big volume of user information, you could use a relational database, and you would have to have a users table where a user name is used as a primary key.

—SA

Member 11493554 · Answer 2 · 2015-03-25T19:25:00

Solution 2

Stored in form of array by reading the pre-existing file, and compared by pointing at each index values and proceeded with further steps

Posted 25-Mar-15 19:25pm