What's wrong with javascript string search? -
why snippet not generate 6? , generates -1?
<!doctype html>  <html>  <body>    <script>      res =('{"name_^":"ali","age":34}'.search('_^'));      document.body.innerhtml = res ;    </script>  </body>  </html>
you're looking indexof function:
'{"name_^":"ali","age":34}'.indexof('_^') returns 6 (search uses regex, , ^ has special meaning in regex- -1 means string wasn't found)
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