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Merge branch 'feature/object-freeze-challenge' of https://github.com/adityaparab/FreeCodeCamp into adityaparab-feature/object-freeze-challenge

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Beau Carnes
2017-09-01 18:58:57 -07:00
parent 900617613f d5f1687a0e
commit 618e164063
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33
seed/challenges/02-javascript-algorithms-and-data-structures/es6.json
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@@ -168,6 +168,39 @@
"challengeType": 1,
"translations": {}
},
{
"id": "598f48a36c8c40764b4e52b3",
"title": "Prevent Object Mutation",
"description": [
"As seen in previous challenge, <code>const</code> declration alone doesn't really protect your data from mutation. To ensure your data doesn't change, JavaScript provides a function <code>Object.freeze</code> to prevent data mutation.",
"Once the object is freezed, you can no longer add/update/delete properties from it. Any attempt at changing the object will be rejected without any error.",
"<blockquote>\nlet obj = {\n name:\"FreeCodeCamp\"\n review:\"Awesome\"\n};\nObject.freeze(obj);\nobj.review = \"bad\"; //will be ignored. Mutation not allowed\nobj.newProp = \"Test\"; // will be ignored. Mutation not allowed\nconsole.log(obj); \n// { name: \"FreeCodeCamp\", review:\"Awesome\"}\n</blockquote>",
"<hr>",
"In this challenge you are going to use <code>Object.freeze</code> to prevent mathematical constants from changing. You need to freeze <code>MATH_CONSTANTS</code> object so that noone is able alter the value of <code>PI</code> or add any more properties to it."
],
"challengeSeed": [
"const MATH_CONSTANTS = {",
" PI: 3.14",
"};",
"// change code below this line",
"",
"",
"// change code above this line",
"MATH_CONSTANTS.PI = 99",
"// Test your code",
"console.log(MATH_CONSTANTS.PI);// should show 3.14"
],
"tests": [
"// Do not replace <code>const</code> keyword.",
"// <code>MATH_CONSTANTS</code> is declared with <code>const</code>.",
"// Do not change original <code>MATH_CONSTANTS</code>",
"assert.deepEqual(MATH_CONSTANTS, {PI: 3.14}, 'message: <code>MATH_CONSTANTS.PI</code> should be equal to <code>3.14</code>.');"
],
"type": "waypoint",
"releasedOn": "Aug 12, 2017",
"challengeType": 1,
"translations": {}
},
{
"id": "587d7b87367417b2b2512b43",
"title": "Use Arrow Functions to Write Concise Anonymous Functions",