How to use the indexOf function from node-emoji

cryptomoji.js

GitHub: mtimkovich/maxtimkovich.com

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return str.split(emojiNameRegex) // parse emoji via regex
          .map(function parseEmoji(s, i) {
            // every second element is an emoji, e.g. "test :fast_forward:" -> [ "test ", "fast_forward" ]
            if (i % 2 === 0) return s;
            var emoji = Emoji._get(s);
            var isMissing = emoji.indexOf(':') > -1;

            if (isMissing && typeof on_missing === 'function') {
              return on_missing(s);
            }

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