Regex to match only the first line?

Question

Is it possible to make a regex match only the first line of a text? So if I have the text:

This is the first line.
This is the second line. ...

It would matc

Answer 1

Yes, you can.

Example in javascript:

"This is the first line.\n This is the second line.".match(/^.*$/m)[0];

Returns

"This is the first line."

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EDIT

Explain regex:

match(/^.*$/m)[0]

• ^: begin of line
• .*: any char (.), 0 or more times (*)
• $: end of line.
• m: multiline mode (. acts like a \n too)
• [0]: get first position of array of results