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var uploadButton = $('<input type="file">');
uploadButton.change(function() {
  var reader = new FileReader();
  reader.onload = function (e) {
    var target = e.target;
    var data = JSON.parse(target.result);
    console.log(data);
  }
  reader.readAsText(uploadButton[0].files[0]);
});

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#element:before {
  content: "";
  position: absolute;
  width: 0;
  height: 0;
  border-left: 16px solid transparent;
  border-right: 16px solid transparent;
  border-bottom: 16px solid #fff;
  top: -15px;
  left: 27px;

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<?php

function shuffle_assoc($list) { 
  if (!is_array($list)) return $list; 
  $keys = array_keys($list); 
  shuffle($keys); 
  $random = array(); 
  foreach ($keys as $key) 
    $random[$key] = $list[$key]; 
  return $random; 

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