variable as argument of string.match()

[Mike]

Hello.

Is it possible to specify a variable instead of a string as argument of
string.match().

Example :

myString.match(/abc/i) works but how to do this :

pattern = "abc"

and then

myString.match(???)

to get the same result.

Thanks beforehand.

Mike

[Martin Honnen]

Mike wrote:

Is it possible to specify a variable instead of a string as argument of
string.match().

Example :

myString.match(/abc/i) works but how to do this :

pattern = "abc"

and then

myString.match(???)

to get the same result.

Use the RegExp constructor

var s = "abc";
alert("abcdefg".match(new RegExp(s, "i")))
but be aware the you might need to double escape backslashes e.g. if
your regular expression literal is
var pattern = /\r/
you need
var pattern = new RegExp("\\r")
--

Martin Honnen
http://JavaScript.FAQTs.com/