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freeCodeCamp/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/convert-html-entities.english.md
Randell Dawson 65686b44e5 fix: removed all hidden chars from tests verbiage (#19674) 
* fix: removed all ​ from tests verbiage

* fix: added single quote to start text string

* remove single quote from text line

* fix: removed the hidden chars in the testStrings

* fix: removed hidden chars from testString section

* fix: removed hidden chars form testString part

* fix: removed hidden chars from testString part

* fix: removed hidden chars from testString part
2018-10-20 17:58:26 +05:30

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id, title, isRequired, challengeType
id title isRequired challengeType
a6b0bb188d873cb2c8729495 Convert HTML Entities true 5

Description

Convert the characters &, <, >, " (double quote), and ' (apostrophe), in a string to their corresponding HTML entities. Remember to use Read-Search-Ask if you get stuck. Try to pair program. Write your own code.

Instructions

Tests

tests:
  - text: '<code>convertHTML("Dolce & Gabbana")</code> should return <code>Dolce &amp; Gabbana</code>.'
    testString: 'assert.match(convertHTML("Dolce & Gabbana"), /Dolce &amp; Gabbana/, "<code>convertHTML("Dolce & Gabbana")</code> should return <code>Dolce &amp; Gabbana</code>.");'
  - text: '<code>convertHTML("Hamburgers < Pizza < Tacos")</code> should return <code>Hamburgers &lt; Pizza &lt; Tacos</code>.'
    testString: 'assert.match(convertHTML("Hamburgers < Pizza < Tacos"), /Hamburgers &lt; Pizza &lt; Tacos/, "<code>convertHTML("Hamburgers < Pizza < Tacos")</code> should return <code>Hamburgers &lt; Pizza &lt; Tacos</code>.");'
  - text: '<code>convertHTML("Sixty > twelve")</code> should return <code>Sixty &gt; twelve</code>.'
    testString: 'assert.match(convertHTML("Sixty > twelve"), /Sixty &gt; twelve/, "<code>convertHTML("Sixty > twelve")</code> should return <code>Sixty &gt; twelve</code>.");'
  - text: '<code>convertHTML(&apos;Stuff in "quotation marks"&apos;)</code> should return <code>Stuff in &quot;quotation marks&quot;</code>.'
    testString: 'assert.match(convertHTML("Stuff in "quotation marks""), /Stuff in &quot;quotation marks&quot;/, "<code>convertHTML(&apos;Stuff in "quotation marks"&apos;)</code> should return <code>Stuff in &quot;quotation marks&quot;</code>.");'
  - text: '<code>convertHTML("Schindler&apos;s List")</code> should return <code>Schindler&apos;s List</code>.'
    testString: 'assert.match(convertHTML("Schindler"s List"), /Schindler&apos;s List/, "<code>convertHTML("Schindler&apos;s List")</code> should return <code>Schindler&apos;s List</code>.");'
  - text: '<code>convertHTML("<>")</code> should return <code>&lt;&gt;</code>.'
    testString: 'assert.match(convertHTML("<>"), /&lt;&gt;/, "<code>convertHTML("<>")</code> should return <code>&lt;&gt;</code>.");'
  - text: <code>convertHTML("abc")</code> should return <code>abc</code>.
    testString: 'assert.strictEqual(convertHTML("abc"), "abc", "<code>convertHTML("abc")</code> should return <code>abc</code>.");'

Challenge Seed

function convertHTML(str) {
  // &colon;&rpar;
  return str;
}

convertHTML("Dolce & Gabbana");

Solution

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

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