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May 22nd, 2015
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  1. function isHiragana(str) {
  2. if (!str || typeof(str) != 'string') {
  3. return false;
  4. }
  5. for (var i = 0; i < str.length; ++i) {
  6. var c = str.charCodeAt(i);
  7. if (!(0x3041 <= c && c <= 0x3093)) {
  8. return false;
  9. }
  10. }
  11. return true;
  12. }
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