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All right so here comes the answer.
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Now we know that we can tap into whatever value the user typed into here
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after that forward slash by tapping into req.params. the name of that parameter which is
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postName right?
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So let's go ahead and instead of console logging it, let's save that into a variable.
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Now let's say something like var requestedTitle is equal to req.params.postName.
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The next thing we need to do is we need to compare this requestedTitle against all the titles that
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we have inside our posts array
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right?
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So we know that posts is an array that contains a bunch of post objects.
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So each object has two key value pairs, a title and a content and the title inside this object is what
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we need to tap into.
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But because we only have access to this posts array in order to access each individual post we have
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to loop through the array.
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Fortunately we already know how to do that and how to do that quite easily.
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We can use our trusty forEach method in order to loop through each of the posts inside the post array.
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So if you remember the syntax was we specify the thing that we wanted to loop through which is our post
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array with an S at the end.
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This is the plural form.
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And then we call forEach on that array. And then we open up a set of parentheses and we put in an anonymous
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function. Inside the parameters of the function we specify the singular form of our array object.
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So that in this case is a single post
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right? Without the 's'. And now we open up a set of curly brackets and inside here we now have access to
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each and individual post inside our post array .
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That means that we can store this other variable which is called storedTitle and this is going to be
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equal to the post.title.
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So what our loop does currently is it will loop through all of the posts inside our post array
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and for each post, it's going to save it into a variable called storeTitle.
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Now some of your developer instincts should be tingling by now as we mentioned we should always start from
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const and then work upwards to let and var as needed.
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So let's go ahead and change that to const and change that to const. And you'll notice that we actually
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don't change the value of either of these inside the curly braces.
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These both work fine for our purposes.
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So now we have the requested title and each stored title Inside our array.
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Now it's time to check for each post
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whether if the storedTitle matches the requestedTitle so we can use an IF statement for that.
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And we check to see if storedTitle === the requestedTitle.
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Then in that case we're going to log match found.
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And now this is all the code that we need to loop through each of our posts, store each of the titles
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inside a constant called storeTitle and then we check if the storedTitle matches with the requested
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title
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and if so, we log match found.
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So let's go ahead and check it out.
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So once you resave our app.js you might notice that our home page is again devoid of any blog posts.
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Now in future modules, we're going to figure out how to fix this.
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But in order to do that we need to learn about databases and that's not the focus of this module.
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So let's just work with it as it is for now.
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And let's head over to compose and create a new post that again has the title of Test and then some
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Lorem Ipsum as the content.
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So now we know that we have this post called Test.
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And no matter how much we refresh, it still saved currently in our server.
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Let's go ahead to posts/Test and I'm going to spell it exactly the same way in terms
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of capitalization as the title of my post. And once I hit enter, you can see in your console that we get
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match found.
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If I go ahead and add another post...
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and I write Day 1, then you can see again we get match found.
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That's the solution to this challenge.
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If you've struggled with this challenge depending on which part you found difficult I recommend reviewing
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the lessons that covered those aspects.
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There's a couple of things that might have tripped you up around here.
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One is using the forEach to loop through our array which we covered previously in challenge 14.
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Or it might be that you got tripped up by the Express routing parameters which we covered just before
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challenge 16.
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So either pause the video and re-explore those topics that you find difficult or if this was a breeze,
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then continue on to the next challenge.