Shorthand regex [A-z] to match all ASCII letters, backtick, caret, underscore, opening & closing square brackets...

regex-ascii-plus.js

// 19 August 2019
// Just learned something new:
// Shorthand regex [A-z] will find all ASCII letters, lower- and uppercase.
// And will also find backtick, caret, underscore, opening and closing square brackets...
// Who knew?
// @jessitron => https://twitter.com/jessitron/status/1163481184413913088

var re = /[A-z]+/;

var tests = `09aZ~!@#$%^&*()_+\`-={}|[]\:;"'<,>.?/'"`.split('');

var results = tests
  .map(char => {
    return {char, match: re.test(char) }
  })
  .sort((a, b) => {
    // shift truthy matches to the lower indexes of the array.
    return a.match ? -1 : b.match ? 1 : 0
  });

var report = JSON.stringify(results, '', 2);

console.log(report);

/*
[
  {
    "char": "a",
    "match": true
  },
  {
    "char": "Z",
    "match": true
  },
  {
    "char": "^",
    "match": true
  },
  {
    "char": "_",
    "match": true
  },
  {
    "char": "`",
    "match": true
  },
  {
    "char": "[",
    "match": true
  },
  {
    "char": "]",
    "match": true
  },
  {
    "char": "0",
    "match": false
  },
  {
    "char": "9",
    "match": false
  },
  {
    "char": "~",
    "match": false
  },
  {
    "char": "!",
    "match": false
  },
  {
    "char": "@",
    "match": false
  },
  {
    "char": "#",
    "match": false
  },
  {
    "char": "$",
    "match": false
  },
  {
    "char": "%",
    "match": false
  },
  {
    "char": "&",
    "match": false
  },
  {
    "char": "*",
    "match": false
  },
  {
    "char": "(",
    "match": false
  },
  {
    "char": ")",
    "match": false
  },
  {
    "char": "+",
    "match": false
  },
  {
    "char": "-",
    "match": false
  },
  {
    "char": "=",
    "match": false
  },
  {
    "char": "{",
    "match": false
  },
  {
    "char": "}",
    "match": false
  },
  {
    "char": "|",
    "match": false
  },
  {
    "char": ":",
    "match": false
  },
  {
    "char": ";",
    "match": false
  },
  {
    "char": "\"",
    "match": false
  },
  {
    "char": "'",
    "match": false
  },
  {
    "char": "<",
    "match": false
  },
  {
    "char": ",",
    "match": false
  },
  {
    "char": ">",
    "match": false
  },
  {
    "char": ".",
    "match": false
  },
  {
    "char": "?",
    "match": false
  },
  {
    "char": "/",
    "match": false
  },
  {
    "char": "'",
    "match": false
  },
  {
    "char": "\"",
    "match": false
  }
]
*/