exercises | basic javascript coding challenges and interview questions | Frontend Framework library
kandi X-RAY | exercises Summary
kandi X-RAY | exercises Summary
These are some basic (and advanced) coding challenges.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of exercises
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jshell> class Person {
..>> }
| created class Person
jshell> Person[] persons = new Person[5];
persons ==> Person[5]{ null,null,null,null,null }
jshell> persons[1] = new Person();
$1 ==> Person@394e1a0f
jshell> p things = str([1, 2, 3, 4, 5])
for thing in things:
print(thing)
before = [[1, 2], [3, 4], [5, 6]]
after = []
for number in before:
after.append(number)
print(after)
input = ['1', '2', '3']
for string in input:
numbers = []
number Enter something, and press Enter without typing anything when you're done.
>hello there
>this is a test
>it seems to work
>
Line 1 is: hello there
Line 2 is: this is a test
Line 3 is: it seems to work
A a
B b
C c
...
X x
Y y
Z z
upper Community Discussions
Trending Discussions on exercises
QUESTION
Hey just doing some exercises in c, one is saying to replace tabs in the input string with any other characters , i restrict myself to only using getchar(), no gets() fgets() etc..., as my learning book didn't catch it yet, so i tried to not break the flow, the code below just printf() the same line it receives, can you please examine why ?
ANSWER
Answered 2021-Jun-15 at 16:33c, which is used inc != '\n', is not initialized at first. Its initial value is indeterminate and using is value without initializng invokes undefined behavior.- You are checking
line[i] != '\0', but you never assigned'\0'tolineunless'\0'is read from the stream. - You should initialize
ibefore the second loop and updateiduring the second loop. - Return values of
getchar()should be assigned tointto distinguish betweenEOFand an valid character. - You should perform index check not to cause buffer overrun.
Fixed code:
QUESTION
I am trying to work on various online exercises and I do not understand why my comparison of two arrays is not working. When I step through the Chrome debugger, I can see that the two arrays are equal.
The following is my code - given the string 'babbad':
...ANSWER
Answered 2021-Jun-13 at 03:53The below snippet show false...
QUESTION
ANSWER
Answered 2021-Jun-11 at 15:24The element you are trying to click has a span tag, not a. Try the following:
QUESTION
We utilizing Azure app services with linux os and we deploying containerized .net core application to the service. The deployment runs using Set-AzWebApp function from Az.Websites ps module. One of the parameters passed to the function is containerimagename which provides a new container version to the service. There is a separate CI process that builds the docker image and pushes it into ACR. When the Set-AzWebApp runs as a part of release pipeline and the new container is deployed I couldn't see any downtime to the service, meaning running health check endpoint returns 200 in browser and the service seems to be available all the time. But my test is unreliable in a sense that I am just pinging health check which is very simple endpoint that exercises service middleware only without running data base request or some other logic.
According to my understanding the service needs to recycle itself to accept a new version of the image and the question is would the consumer of the service expirience any downtime during the recycle, also what happens with requests that run during recycle process?
...ANSWER
Answered 2021-Jun-11 at 01:29The continuous deployment feature of the Azure App Service will help you avoid downtime when you update the image. Here you can see the details:
We'll pull the image and start the container, and we'll wait until that new container is running and ready for HTTP requests before we switch over to it. During that time, your old image will continue to serve requests into your app.
So maybe you enable this feature.
QUESTION
I'm trying to include the following pstricks code snippet in R/exams .Rmd exercises, but I have no idea how to do it:
...ANSWER
Answered 2021-Jun-10 at 18:30Yes, it is possible, although I wouldn't recommend it. You can use the following:
- Set up a string with the LaTeX code include pstricks.
- Call
tex2image(..., packages = c("auto-pst-pdf", ...))so that the LaTeX package {auto-pst-pdf} is used. This supports embedding pstricks in documents for the pdfLaTeX by calling LaTeX for the figure in the background. - Make sure
tex2image()calls pdfLaTeX with the-shell-escapeoption so that pdfLaTeX is allowed to call LaTeX. This is relatively easy by using the R packagetinytex.
A worked example for this strategy is included below, it is called dist4.Rmd. If you copy the R/Markdown code to a file you can run:
QUESTION
I am currently doing an apprenticeship in which I am learning to use python 3.
I am going through some exercises, following instructions/walkthroughs provided.
I have started to get the below error when trying to change column names:
...ANSWER
Answered 2021-Jun-10 at 12:35It seems that you are missing a few commas, which in python dictionaries separate between key-value pairs. Pay attention to the additional commas in the following code:
QUESTION
Im doing some java exercises and i need to create an object with an array inside. This array uses variables from the object itself like so:
...ANSWER
Answered 2021-Jun-10 at 06:28Because when you say,
QUESTION
ANSWER
Answered 2021-Jun-09 at 18:45You need to change the directory properties: Right click on the "java_how_to_program_e11" and select "Properties" for the project. In the search bar type "source" and select "Java Build P...". In the resulting "Java Build Path Properties" view ... you can remove the directories from being a "source" directory. In the same properties view, you can add the subdirectores under each of the chapters as a source directory by clicking "Add Folder".
QUESTION
I'm trying to test the following view
...ANSWER
Answered 2021-Jun-09 at 10:47You need to use reverse to build your URL rather than hard coding it. Since you hard coded it, it is getting a 404 since the URL the test tried to post to is incorrect.
I don't know the app_name in your URLs file, you will need to add that to the reverse. For example if it was excercise it would be exercise:generate-edl.
QUESTION
When doing rustlings standard_library_types/iterators2.rs, I started wondering how std::iter::Iterator::map calls its argument closure/function. More specifically, suppose I have a function
ANSWER
Answered 2021-Jun-07 at 02:02Why can I call capitalize_first with a &&str argument?
The linked Q&A for auto-dereferencing rules is specifically for how self is resolved when using the a.b() syntax. The rules for arguments in general skip the auto-reference step and just rely on Deref coercions. Since &&str implements Deref (and indeed all references implement Deref), this &&str -> &str transformation happens transparently.
Why doesn't it work for .map() then?
Plain and simply, map() is expecting something that implements Fn(&&str) -> T and capitalize_first does not. A Fn(&str) is not transparently transformed into a Fn(&&str), it requires a transformation step like the one introduced by the closure (albeit transparently).
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