Another way to concatenate

Is there another a way to开发者_Go百科 concatenate a '#' character like I'm doing below?

radioButtonID = '#' + radioButtonID;

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    "#".concat(radioButtonID)
or
    ["#",radioButtonID].join('')

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I suppose you could do something like this:

var radioButtonID = ['#', radioButtonID].join('');

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That's about as short as it could get if you are prefixing.

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What's wrong with what you've got there? That should work.

Unless you're looking for a stringbuffer or something...

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Not very efficient, but this works:

radioButtonID.replace(/(.+)/,"#$1")