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id	title	challengeType	videoUrl	forumTopicId
56533eb9ac21ba0edf2244ba	Understand String Immutability	1	https://scrimba.com/c/cWPVaUR	18331

--description--

In JavaScript, String values are immutable, which means that they cannot be altered once created.

For example, the following code:

var myStr = "Bob";
myStr[0] = "J";

cannot change the value of myStr to "Job", because the contents of myStr cannot be altered. Note that this does not mean that myStr cannot be changed, just that the individual characters of a string literal cannot be changed. The only way to change myStr would be to assign it with a new string, like this:

var myStr = "Bob";
myStr = "Job";

--instructions--

Correct the assignment to myStr so it contains the string value of Hello World using the approach shown in the example above.

--hints--

myStr should have a value of Hello World.

assert(myStr === 'Hello World');

You should not change the code above the specified comment.

assert(/myStr = "Jello World"/.test(code));

--seed--

--after-user-code--

(function(v){return "myStr = " + v;})(myStr);

--seed-contents--

// Setup
var myStr = "Jello World";

// Only change code below this line
myStr[0] = "H"; // Change this line
// Only change code above this line

--solutions--

var myStr = "Jello World";
myStr = "Hello World";

1.4 KiB Raw Blame History