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Start your free trialIain Diamond
29,379 PointsMaps Challenge
When I run 'Check Work' it tells me I'm returning the wrong count for food, 'expected 2, received 3'. However, I've rewritten the code out in full externally with my own tests and I can't recreate the problem. Any clues are most welcome.
BlogPost.java
package com.example;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
public class BlogPost implements Comparable<BlogPost>, Serializable {
private String mAuthor;
private String mTitle;
private String mBody;
private String mCategory;
private Date mCreationDate;
public BlogPost(String author, String title, String body, String category, Date creationDate) {
mAuthor = author;
mTitle = title;
mBody = body;
mCategory = category;
mCreationDate = creationDate;
}
public int compareTo(BlogPost other) {
if (equals(other)) {
return 0;
}
return mCreationDate.compareTo(other.mCreationDate);
}
public String[] getWords() {
return mBody.split("\\s+");
}
public List<String> getExternalLinks() {
List<String> links = new ArrayList<String>();
for (String word : getWords()) {
if (word.startsWith("http")) {
links.add(word);
}
}
return links;
}
public String getAuthor() {
return mAuthor;
}
public String getTitle() {
return mTitle;
}
public String getBody() {
return mBody;
}
public String getCategory() {
return mCategory;
}
public Date getCreationDate() {
return mCreationDate;
}
}
Blog.java
package com.example;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TreeSet;
public class Blog {
List<BlogPost> mPosts;
public Blog(List<BlogPost> posts) {
mPosts = posts;
}
public List<BlogPost> getPosts() {
return mPosts;
}
public Map<String, Integer> getCategoryCounts() {
Map<String, Integer> categoryCounts = new HashMap<>();
Integer count = 0;
for (BlogPost post: mPosts) {
String category = post.getCategory();
// Check if the category is new
if (!categoryCounts.containsKey(category)) {
count = 0;
}
count++;
categoryCounts.put(category, count);
}
return categoryCounts;
}
public Set<String> getAllAuthors() {
Set<String> authors = new TreeSet<>();
for (BlogPost post: mPosts) {
authors.add(post.getAuthor());
}
return authors;
}
}
1 Answer
Craig Dennis
Treehouse TeacherHmmm...what if that count variable was inside the for loop? Seems to be ever incrementing and not resetting. In fact, what if you got it out of the Map each time by key. Remember if a key doesn't exist you will get back a null value.
That help? (I can be less hinty if you want me to be) ;)
Iain Diamond
29,379 PointsIain Diamond
29,379 PointsHi Craig, I'll mull over your clue.
Just for the record I've included my test case and the results below. I'm very puzzled as the results are telling me the counter is working properly.
And here are the results.
Craig Dennis
Treehouse TeacherCraig Dennis
Treehouse TeacherHmm...try making those numbers a little less standard...add a PHP and a JavaScript.
Iain Diamond
29,379 PointsIain Diamond
29,379 PointsThanks Craig, once I modified the posts I was able to figure out what I was doing wrong. Fixed it now. :)
Craig Dennis
Treehouse TeacherCraig Dennis
Treehouse TeacherAwesome way to stick with it! Crazy luck that was working, nothing worse than false positives. Congrats!