Case-insensitive keyword emphasis. See http://stackoverflow.com/questions/15008611/replace-with-gsub-a-regexp-with-accents

emphasis.js

function emphasisKeyword(keyword, string) {
	var h = { e: "[eéê]", a: "[aáâ]" };

	var matched = keyword.match(/[\S\s]/g);

	var res = [];
	for (var i = 0; i < matched.length; i++) {
		if (h[matched[i]]) {
			res.push(h[matched[i]]);
		} else {
			res.push(matched[i]);
		}
	};

	var re = new RegExp('(' + res.join('') + ')', 'ig');
	return string.replace(re, "<strong>$1</strong>");
}

emphasis.rb

def emphasis_keyword(str, keyword)
	h = { "e" => "[eéê]", "a" => "[aáâ]" }
	regex = keyword.gsub(/./) {|s| h.fetch(s, s)}
	return str.gsub(/(#{regex})/i, '<strong>\1</strong>').html_safe
end

1

2