Regex for replacing a single-quote with two single-quotes

Question

I\'m running into an issue that I think is being caused by needing to double-up on some single quotes inside a string. However, JS\'s string.replace uses RegEx, and I\'ve ne

Answer 1

js> s = "abc'def'xyz"
abc'def'xyz
js> s.replace(/'/g, "''")
abc''def''xyz

Answer 2

JS's string.replace uses RegEx

Not necessarily:

var str = "O'Reilly's books";
alert(str.replace("'", "''", 'g'));

MDC's String replace reference:

The pattern can be a string or a RegExp

Mmm, my code above doesn't seem to work on IE6, so that will be:

str.replace(/'/g, "''")

like the others said, but using regexes for such simple operation is overkill.

Answer 3

Try this:

function QuoteEncoding(strvalue) {
    var strquotes = /(')/g;
    return "'" + strvalue.replace(strquotes, "''") + "'";
}

call this method as follows:

QuoteEncoding(strvalue);

Answer 4

Note that if you don't want to use RegExp (and there are often good reasons not to), the idiom for a simple string replacement is:

str.split("'").join("''")

Although the RegExp version is typically marginally faster, the string version can be a win when you don't know if there might be regex-special characters (like .) in the search string.

Answer 5

str.replace(/'/g, "''");

Be sure to use the global match flag (g) so that you replace any and all occurrences in the string. More info here.

Answer 6

Try this:

yourstring = yourstring.replace(/'/g, "''")