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QUESTION
Details: I have 2 radio groups with some radio buttons.
What i want: User only select one radio button from 2 groups.
What i have done:
...ANSWER
Answered 2020-Nov-04 at 11:19Calling this line once, inside onCreate() of Activity or onCreateView() of Fragment:
QUESTION
I am currently reading up on Generic Comparison's in TypeScript. I get it that types are removed when transpiling from TypeScript to JavaScript so you can't compare two generic types.
So this is a 3-part question.
Question 1: Can someone explain what extends Array
does here?
Question 2: I know when I console.log(c3), I get [ '1', '2', '500', '600' ]
So when I call concatenate(l1, l4)
, because l1
and l4
share the same ID and type, const oneList
is created and then returned?
Question 3: What is T1 doing? Is it essentially the ID being used for list1
and list2
?
ANSWER
Answered 2020-Oct-26 at 01:58Q1: The extends
in class Foo extends Bar
is part of JavaScript (well, ECMAScript 2015 and above) and not only part of TypeScript's static type system. Therefore it does not get erased. If the target JavaScript version is ES2015 or later, the emitted JavaScript code will contain class Foo extends Bar
directly. If it is something lower, like ES5, it will be transpiled to code which works the same (ish), but will still be included. Both Foo
and Bar
constructors will exist in the emitted code.
Anyway, class Foo extends Bar
is called subclassing, and it produces a class constructor Foo
whose instances will inherit behavior from the superclass Bar
. Also, new Foo() instanceof Bar
will be true
(all Foo
instances are also Bar
instances), but new Bar() instanceof Foo()
will be false
(not all Bar
instances are also Foo
instances).
When the superclass is Array
as in class ABC extends Array {}
, it means that you are extending a built-in class. Every instance of your subclass should also be an instanceof Array
.
Now the rest of your question is a bit confusing because the code for concatenate()
is... well, it's not good. I will answer what the type signature says it does, and note how it differs from what the implementation actually does:
QUESTION
I have a .csv file with 1500 lines and each line looks like this:
...ANSWER
Answered 2020-May-06 at 00:37To take a list,
QUESTION
This question maybe is meaningless. We always create a list by only one line,like
...ANSWER
Answered 2020-Mar-13 at 17:25You can create dictionaries in the similar way you create lists using list comprehension:
QUESTION
Background
I am trying to build a list with a checkmark/tick box next to it. A struct is used to create the "data" for each item. This is then passed on to a class which holds an array of the items created by the struct. From here I used the observable object protocol and passed the class into a list.
Objective
I would like to be able to individually mark each item as completed when it is done.
Current Analysis
I know the image switches when I manually change the 'completed' value from false to true.
I also tested the onTapAction just to be sure it is working.
I think the problem lies in "self.one.completed.toggle()" or the binding or something I am unaware of.
ANSWER
Answered 2019-Dec-18 at 03:35In my other answer I achieved something like this with ObservableObject
protocol for needed object and then playing with EnvironmentObject
. Actually I didn't try to do this with other wrappers. Here is the code, where you can see switching images:
QUESTION
I am using Recyclerview
with multiple ViewTypes.I have two Model classes for two different type of item in recyclerview as.I want to display two different type of item in same RecyclerView
My RecyclerViewAdapter
is
ANSWER
Answered 2018-Oct-26 at 09:27here is the complete example. I've used a RecyclerView with Multiple View Type. My scenario was, I have to show "cuisine list" [which is a horizontal view of multiple cuisines], then "number of restaurant", then "restaurant list".
so, i've used VIEW_RESTAURANT for restaurant view, VIEW_CUISINE for cuisine, VIEW_INFO for number of restaurant. As for my case, there's pagination, so VIEW_PROGRESS is used for showing progress bar at the bottom [by that time new set of data is fetch, if avaiable], VIEW_NO_DATA is used if restaurant list is empty.
hopefully from here, You can manage based on your requirement.
QUESTION
I have two sets of lists with the following format:
...ANSWER
Answered 2018-Oct-19 at 00:57We can use map2
from the purrr
package to conduct this replacement. dat
is the final output.
QUESTION
I am working on this code and I cannot get the "removeLetter" to delete the letter the user chooses from the "chosen" list. I figured out I can't use list functions with strings, but I don't know how to go about making the start.remove() code to work without converting the user's string input to match the item he/she would like to be removed from the "chosen" list. Can someone help me please?
...ANSWER
Answered 2018-Jul-17 at 19:55You have an error in your code specifically in this line:
QUESTION
I am encountering a problem where the "WaitAll" for my tasks does not wait until all of the tasks are finished. This is a VB project with sub's and functions. A lot of the other examples of this (in C#) use lambda's that do not easily convert to VB.
I have tested with a sample program and gotten it to work, but as soon as I try to communicate with a web service (which adds async and await), it does not wait at the WaitAll anymore.
This is an example of the log file. You can see how the button click ends on lines 6 and 7, even though the tasks are still running and continue to log work after the button click has finished.
...ANSWER
Answered 2018-Jul-06 at 18:24I cannot explain why the code works when you replace the API call with a sleep. I can offer this as a solution to fix the code and make it wait for the WaitAll to complete.
Below are the three changes you need to do in order to make the project work. The changes are done to make the Sub into a function – so it is now forced to return something.
In btnRun_Click
, change
QUESTION
This post may be duplicate one, apologies for that.
I have worked extensively in Java-6, now moving to Java 8. Is there an efficient way to rewrite the below logic in Java 8?
This compares list of objects with single object, returning true
if some object in the list has a matching "Identifier" parameter value.
ANSWER
Answered 2018-Jun-12 at 16:59private boolean compareOrder(UserOrderDTO.OrderConfig givenDeviceConfig, List masterConfigList) {
return givenDeviceConfig.getIdentifier() != null
&& masterConfigList.stream().anyMatch(
p -> p.getIdentifier() != null
&& p.getIdentifier().trim().equalsIgnoreCase(givenDeviceConfig.getIdentifier().trim()));
}
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