kandi X-RAY | mooc Summary
kandi X-RAY | mooc Summary
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- Parse a rule
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Community Discussions
Trending Discussions on mooc
QUESTION
I've been doing the MOOC Java programming course and they typically override equals like this:
- If addresses of the 2 objects are the same = return true.
- If compared object is not an instance of the same class as the first object = return false.
- Convert the object to the same type as the one being compared to
- Compare the variables of each object - returns true or false
I'm just a bit confused about step 2 and 3.
- Step 2 checks if the 2nd object is an instance of the same type as the one its compared to...
If it isn't, the method ignores the rest of the code and returns false
If it is, we convert it to that Class. So at this point i'm confused about why we need to convert an object that is already an instance of the same class - to that class? If Java recognises it is of the same type, why do you need to convert it?
*Example below:
...ANSWER
Answered 2022-Mar-31 at 18:42Because you’ve only compared the dynamic type; the static type of comparedObject
is unchanged: it’s Object
, and you cannot access its Book
members (think about it: at this point you know that the dynamic type of comparedObject
is Book
; but the Java compiler still sees it with its declared type). To make the compiler understand that the object type is Book
, you first need to create an object whose static type is Book
, and to do that you need a cast.
The static type information is what the Java compiler sees, and which is what the compiler uses to check whether your code is statically correct.
QUESTION
I'm having some trouble making a print statement that includes quotes and a new line escape sequence. I tried to use \n for a new line and backslash before open quote and before closing quotes to tell my program to include the quotations. I don't know where I went wrong and I keep getting an error in my int main(void) line (sorry if I'm not using correct terminology, I'm in an intro c MOOC).
...ANSWER
Answered 2022-Feb-12 at 22:03you forgot the closing quote
QUESTION
I am going through Mooc.fi Java course and I can't figure how not to write String into file if the file already contains it. I tried only with one String and tried without " " (empty space), and without another string, but still it adds the string even when the file already contains it.
And translate()
method doesn't find/return whole line in which it found the given word.
ANSWER
Answered 2022-Jan-12 at 19:16The problem is that your Scanner
object has already been consumed by the add()
method. You need to reopen the input stream in order to read the contents of the file. If you add
QUESTION
I enrolled myself in the University of Helsinki's Java course. To follow along with this course, I had to install the NetBeans IDE and complete their exercise through this IDE.
However, when running a simple Hello World program:
I receive this error:
Does anyone know how to fix this error? If it helps, I was asked to download this as well:
And I installed NetBeans from this link: https://download.mooc.fi/tmcbeans/installers/tmcbeans_1.4.0_installer.dmg which was provided to me by the website.
Thank you in advance.
...ANSWER
Answered 2022-Jan-08 at 19:42try this:
Right click on the Project -> Properties -> Sources -> Change the Source/Binary Format from JDK 6 to newer version.
QUESTION
This is the exercise from https://haskell.mooc.fi/ training
...ANSWER
Answered 2021-Dec-28 at 12:43With only do-notation and conditional statements I found the following solution:
QUESTION
I am new to programming and started the MOOC.FI course (https://www.mooc.fi/en/installation/netbeans) I am running Windows 10. I downloaded both TMC beans 1.4.0, as well as Eclipse Temurin JDK with Hotspot 11.0.12+7(x64).
When I open Netbeans, it says
The JDK is missing and is required to run some NetBeans modules Please use the --jdkhome command line option to specify a JDK installation or see http://wiki.netbeans.org/FaqRunningOnJre for more information.
I tried :
- Uninstalling and redownloading both the JDK and TMC beans.
- Changing the tmcbeans.conf file, changing the file to: #jdkhome="C:\Program Files\Eclipse Foundation\jdk-11.0.12.7-hotspot"
- Adding: netbeans_jkdhome="C:\Program Files\Eclipse Foundation\jdk-11.0.12.7-hotspot"
Both haven't stopped TMC Beans from returning the same message.
EDIT:
The problem is fixed, I downloaded OpenJDK 8 with hotspot from https://adoptopenjdk.net/archive.html?variant=openjdk11&jvmVariant=openj9
Then, I added the line 'jdkhome="C:\Program Files\Eclipse Foundation\jdk-8.0.302.8-hotspot"' to the tmcbeans.conf file. I found it at C:\Program Files\TMCBeans\etc.
After this, the message no longer appears.
...ANSWER
Answered 2021-Aug-20 at 10:18Have you tried downloading the older JDKs from - https://adoptopenjdk.net/archive.html?variant=openjdk11&jvmVariant=openj9?
EDIT 20/08/21 The University of Helsinki is aware of the issue and they are working to resolve it.
QUESTION
I've been working on optimizing some Euclidean distance transform calculations for a program that I'm building. To preface, I have little formal training in computer science other than some MOOCs I've been taking.
I've learned through empirical testing in Python that assigning values to individual variables and performing operations on them is faster than performing operations on arrays. Is this observation reproducible for others?
If so, could someone provide a deeper explanation as to why there are such speed differences between these two forms of syntax?
Please see some example code below.
...ANSWER
Answered 2021-Sep-20 at 23:03Python operations and memory allocations are generally much slower than Numpy's highly optimized, vectorized array operations. Since you are looping over the array and allocating memory, you don't get any of the benefits that Numpy offers. It's especially bad in your first one because it causes an undue number of allocations of small arrays.
Compare your code to one that offloads all the operations to Numpy instead of having Python do the operations one by one:
QUESTION
I'm currently learning Java through University of Helsinki's MOOC on Java and I'm stuck on an exercise about loops.
The exercise asks the user to input two integers which create a closed interval. The output should be the sum of the sequence of those numbers.
E.g. First number is 3, last number is 5. The result of the sum would be 3+4+5=12. My issue is that in the results only the numbers 4 and 5 were counted. Here is my code:
...ANSWER
Answered 2021-Jul-27 at 14:26Manipulating loops like this (starting with first-1
for example) is fine and often done. But I think if you want a cleaner solution you should do two things. First, don't increment n
before you use it. And second since you want the final value included in the sum, you should use <=
rather than <
.
QUESTION
I'm doing the University of Helsinki Java MOOC and there's an exercise that consists in creating a program that lets you input as much numbers as you want, but as soon as you input a 0 the program ends and prints the total number of inputs you did and the sum of all of them.
I wrote the code and it works as intended except for one detail that I'll explain bellow. Here's my code:
...ANSWER
Answered 2021-Jul-23 at 13:23Well You have the right idea but if u want the loop to break immediately after inputting a 0 then place your if
statement at the appropriate place like so:
QUESTION
I am building a website to showcase my future projects. But a whitespace randomly appeared on the site. When I inspect the site in chrome, the space does not seem to belong to any element. The space is between the banner and container-fluid from bootstrap. But when I add an extra div between the banner and container-fluid, the space seems to be on top of the container-fluid rather than below the banner.
Another problem I wanted to solve was, how can I make the text "Coming Soon" disappear when I hover over the images. I tried using "+" and "~" but it doesn't seem to work.
Any help or ideas would be very much appreciated! :) Here is the code.
...ANSWER
Answered 2021-Jul-12 at 06:42Solution for whitespace: Remove margin-top
styling applied to the div class="row mt-4"
inside div class="container-fluid"
.
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