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Convert HTML Entities

curriculum/challenges/english/blocks/intermediate-algorithm-scripting/a6b0bb188d873cb2c8729495.md

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--description--

Convert the characters &, <, >, " (double quote), and ' (apostrophe), in a string to their corresponding HTML entities.

--hints--

convertHTML("Dolce & Gabbana") should return the string Dolce &amp; Gabbana.

js
assert.match(convertHTML('Dolce & Gabbana'), /Dolce &amp; Gabbana/);

convertHTML("Hamburgers < Pizza < Tacos") should return the string Hamburgers &lt; Pizza &lt; Tacos.

js
assert.match(
  convertHTML('Hamburgers < Pizza < Tacos'),
  /Hamburgers &lt; Pizza &lt; Tacos/
);

convertHTML("Sixty > twelve") should return the string Sixty &gt; twelve.

js
assert.match(convertHTML('Sixty > twelve'), /Sixty &gt; twelve/);

convertHTML('Stuff in "quotation marks"') should return the string Stuff in &quot;quotation marks&quot;.

js
assert.match(
  convertHTML('Stuff in "quotation marks"'),
  /Stuff in &quot;quotation marks&quot;/
);

convertHTML("Schindler's List") should return the string Schindler&apos;s List.

js
assert.match(convertHTML("Schindler's List"), /Schindler&apos;s List/);

convertHTML("<>") should return the string &lt;&gt;.

js
assert.match(convertHTML('<>'), /&lt;&gt;/);

convertHTML("abc") should return the string abc.

js
assert.strictEqual(convertHTML('abc'), 'abc');

--seed--

--seed-contents--

js
function convertHTML(str) {
  return str;
}

convertHTML("Dolce & Gabbana");

--solutions--

js
var MAP = { '&': '&amp;',
            '<': '&lt;',
            '>': '&gt;',
            '"': '&quot;',
            "'": '&apos;'};

function convertHTML(str) {
  return str.replace(/[&<>"']/g, function(c) {
    return MAP[c];
  });
}