Generic numeric template formatter

generic-numeric-template-formatter/index.js

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+// Generic numeric template formatter
+// https://www.codewars.com/kata//train/javascript
+
+function numericFormatter(template, digits) {
+  digits = digits || '1234567890';
+  let cnt = 0;
+  return template.replace(/[a-z]/gi, c => digits[cnt++ % digits.length]);
+}