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Rami
Lv 5
Rami asked in Computers & InternetProgramming & Design · 8 years ago

why this function writes 2 instances of "on "?

(function myFunction()

{

    var str="on";

    var n=str.match(/^(on|off)$/i);

    document.write(n);

})()

Update:

this is #javascript of course

Update 2:

even exec does the same

Update 3:

it should write "on" not "on,on"

2 Answers

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  • Anonymous
    8 years ago
    Favorite Answer

    It's because your regex has the paretheses (). The first element of the array is the whole regex match, and the next elements represent the part that is matched inside parentheses.

  • Steven
    Lv 4
    8 years ago

    wouldn't you want to use str.length? I guess I'm assuming you want to count the letters in the string

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