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kandi X-RAY | challenge Summary
kandi X-RAY | challenge Summary
Choose the challenge most appropriate for you (one is enough):. Please state clearly your name and the position yor are applying for in your email.
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QUESTION
I am building an app following the Rest Countries API challenge from frontendmentor (https://www.frontendmentor.io/challenges/rest-countries-api-with-color-theme-switcher-5cacc469fec04111f7b848ca). I have run into a problem. When clicking on the router link in countryDetail.js, the url changes but the component doesn't get re-rendered unless the page is refreshed.
CountryDetails.js
...ANSWER
Answered 2021-Jun-15 at 17:07The issue seems to be that you are already on the "/country/:name"
path and are clicking to visit another country. The router correctly updates the URL in the address bar, but because CountryDetail
is already mounted it neglects to recompute the item
and allCountries
state. This is because the useEffect
hook only runs once when the component mounts.
The name
param (match.params.name
) is actually a dependency for the GET requests, it should be added to the useEffect
hook's dependency array.
QUESTION
I wish to move a large set of files from an AWS S3 bucket in one AWS account (source), having systematic filenames following this pattern:
...ANSWER
Answered 2021-Jun-15 at 15:28You can use sort -V
command to consider the proper versioning of files and then invoke copy command on each file one by one or a list of files at a time.
ls | sort -V
If you're on a GNU system, you can also use ls -v
. This won't work in MacOS.
QUESTION
I'm learning Vue 3 with Vuex 4 and I'm stucked with something that I'm pretty sure it's simple but I can't see.
In few words, i'm trying to set some data in state
to have it available to use it in my components but it isn't working.
Let me show you the code:
/// store.js
...ANSWER
Answered 2021-Mar-28 at 20:16You've to dispatch that actions inside mounted hook :
QUESTION
I am building an app following the Rest Countries API challenge from frontendmentor. I have run into a problem. When trying to find the border countries full name using the alpha3code, I get the error :
TypeError: Cannot read property 'name' of undefined
.
ANSWER
Answered 2021-Jun-15 at 10:55This may not answering your question but have you tried console.log(response.data) before setItem(response.data) to check the data you get from axios.get? sometimes console.log can help
QUESTION
I am solving this problem on dynamic array in which input first line contains two space-separated integers,n, the size of arr to create, and q, the number of queries, respectively.
Each of the q subsequent lines contains a query string,queries[i]
. it expects to return int[]
: the results of each type 2 query in the order they are presented.
i tried to attempt as below and my code seems fine to me but it gives segmentation fault error. please help me where I am getting conceptually wrong. thanks.
problem: Declare a 2-dimensional array,arr
, of n
empty arrays. All arrays are zero indexed.
Declare an integer,last answer , and initialize it to zero
.
There are 2
types of queries
, given as an array of strings for you to parse:
Query: 1 x y
Let idx=((queries[i][1]^last_answer)%n);
.
Append the integer y to arr[idx]
.
Query: 2 x y
Let idx=((queries[i][1]^last_answer)%n);
.
Assign last_answer=arr[idx][queries[i][2]%(arr[idx].size())]
.
Store the new value of last_answer
to an answers array.
input: 2 5
1 0 5
1 1 7
1 0 3
2 1 0
2 1 1
output:
7
3
...ANSWER
Answered 2021-Jun-15 at 11:25You are accessing elements of vector
without allocating them.
resize()
is useful to allocate elements.
QUESTION
I have a field in my table that contains a string that can follow any of 3 formats:
- null
- "[string]"
- "Following fields matched: {string=string, string=string, string=string..}"
For 1 I need output : null For 2 I need output : For 3 I need to split each pair into its each row with columns [key] & [value]
Now, I have solved this challenge, I just think that I have done it in the most eloquent or efficient manner.
Would be grateful if anyone could point me to a better solution ? Thanks
...ANSWER
Answered 2021-Jun-14 at 17:01You query is not working properly to me (with data example '{a=b, c=d, e=f}' I get an empty row).
My attempt, I am not sure that my query result is exactly what you want.
I convert all rows to array format, then unnest them (using comma separator). I split rows that contain equal sign to array, and then I get the result in two columns (key, value).
Table:
QUESTION
I would greatly appreciate any feedback you might offer regarding the issue I am having with my Word Prediction Shiny APP Code for the JHU Capstone Project.
My UI code runs correctly and displays the APP. (see image and code below)
Challenge/Issue: My problem is that after entering text into the "Text input" box of the APP, my server.R code does not return the predicted results.
Prediction Function:
When I run this line of code in the RConsole -- predict(corpus_train,"case of") -- the following results are returned: 1 "the" "a" "beer"
When I use this same line of code in my server.r Code, I do not get prediction results.
Any insight suggestions and help would be greatly appreciated.
...ANSWER
Answered 2021-Apr-27 at 06:46Eiterh you go for verbatimTextOutput
and renderPrint
(you will get a preformatted output) OR for textOutput
and renderText
and textOutput
(you will get unformatted text).
QUESTION
The project: for a list of meta-data of wordpress-plugins: - approx 50 plugins are of interest! but the challenge is: i want to fetch meta-data of all the existing plugins. What i subsequently want to filter out after the fetch is - those plugins that have the newest timestamp - that are updated (most) recently. It is all aobut acutality... so the base-url to start is this:
...ANSWER
Answered 2021-Jun-09 at 20:19The page is rather well organized so scraping it should be pretty straight forward. All you need to do is get the plugin card and then simply extract the necessary parts.
Here's my take on it.
QUESTION
I am trying an exercise that requires you to:
write a program that returns a list that contains only the elements that are common between the lists (without duplicates). Make sure your program works on two lists of different sizes.
I was able to do this, but one of the extra challenges is to:
Write this in one line of Python
I came up with the following code:
...ANSWER
Answered 2021-Jun-14 at 06:32A basic approach would be to cast newList to set and then recast it to list
QUESTION
In this challenge, using javaScript you will create 3 classes
- Super class called
Animal
. Dog
andCat
class which both extendsAnimal
class (a dog is an animal and a cat is an animal)Dog
andCat
class should only have 1 function, which is their own implementation of thesound()
function. This is polymorphism- a
Home
class. But we’ll talk about that later
ANSWER
Answered 2021-Jun-05 at 13:48Since 2015 there should be no more need to go through the pain of assigning prototype
properties like that, and establish inheritance between two classes with such assignments.
I would suggest rewriting your code completely, and using the class
syntax, where you don't need to explicitly do this inheritance fiddling with the prototype
property:
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