String to number conversion

Question

I am trying to make several chatcommands in my new server modification for Crysis Wars that requires numbers and strings. To get the player input, I do this:

local name, time, reason = string.match(chatMsg, "^!punish (.*) (%d+) (.*)");

For some reason, it's not working properly (gets the number value as a string). The number value is the second variable in the string.match. Am I doing something wrong here? I've also tried to find a solution to this, but have not found any. Perhaps I should be using a different method to get the number?

this could not work, as tonumber takes (up to) two arguments, and the second must be a number type, while string.match returns as many string values as captures in the pattern; Like I wrote in my answer, add the line. — dualed
– dualed, Commented May 28, 2013 at 8:29

dualed · Accepted Answer · 2013-05-28 08:39:04Z

7

It's actually quite simple, just add the following line after the line you posted in your question.

time = tonumber(time);

As mentioned in the comments below, you can achieve the same with

time = time + 0

edited May 28, 2013 at 8:39

answered May 28, 2013 at 8:21

dualed

10.5k1 gold badge28 silver badges30 bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

finnw Over a year ago

Lua does do automatic conversion if you do arithmetic on decimal strings. e.g. "42"+"5" gives (the number) 47.

dualed Over a year ago

Ouch, I stand corrected. It seems it does. Well the answer is still correct in that this will convert the string value to a number cough

Egor Skriptunoff Over a year ago

Agree with @finnw : time = time + 0 would do the same conversion ;-)

dualed Over a year ago

@EgorSkriptunoff There is one difference though: "a"+0 causes an error while tonumber("a") just returns nil

Collectives™ on Stack Overflow

String to number conversion

1 Answer 1

4 Comments

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

4 Comments

Related