You can use nested replicate :: Int -> a -> [a]: makeBoard :: Num a => Int -> Int -> [[a]] makeBoard h w = replicate h $ replicate w 1 replicate takes thus an Int and an element a and generates a list [a] that contains n times that element. So the second replicate … Read more
In the stacktrace I see this: java.lang.NullPointerException: Attempt to invoke interface method ‘int java.util.List.size()’ on a null object reference The adapter is trying to call size() on a null List. Make sure your list searchResults is not null. solved My object is not null but I’m getting a NULL POINTER EXCEPTION
As I understand it, you want a column that checks if the temperature deviates by 5 – 6 degrees (if the temp is greater than 10) and another column to check if it is differs by 7 degrees or more. The current code you are using seems to identify the coldwave values correctly, although is … Read more
Try to: killall node rm -rf node_modules/ Then uninstall the application if the application has been installed, and make sure all port nodes have stopped. 0 solved React Native Issue:
You could take a look at Glib, there are some file utilities that can be helpful here. More specifically, you can use g_dir_open function on every file in a directory. If this function sets the GError**error pointer non-null, then you have tried to open a file, otherwise you’ve just parsed into a subdir… Your code … Read more
It’s a question of design. Weapon has the field addPower, but IWeapon does not. This would imply, that not all weapons (not all classes that implement IWeapon) do add power to the character. So you can’t use this property, if the interface doesn’t define it. (Casting an interface to an implementing class defies the whole … Read more
In the copy/pasted code, when defining service_name, [enter image description here][1] does not make sense. I assume it is a typo. From what you said, here is an example of corrected code (for restarting services). You still have to adapt it if you want to stop services. import wmi services_to_monitor = [‘SolarWindsAdministration’,’SolarWindsAgent64′, ‘SolarWindsAlertingServiceV2′,’SWCollectorService’, ‘SolarWindsCortex’,’SWInfoServiceSvc’, ‘SWInfoServiceSvcV3′,’SWJobEngineSvc2’, … Read more
We can use pivot_longer library(dplyr) library(tidyr) # 1.0.0 df1 %>% pivot_longer(cols = matches(“^Q\\d+_\\d+”), values_to = ‘Q1’) %>% select(-name) 4 solved Surveydata Package Question, merge columns [closed]
You can create a separate method: for task in self.tasks: task = randomTask() … def randomTask(): while True: num1 = random.randint(0, 10) num2 = random.randint(0, 10) if num1 + num2 <= 10: break return “{} + {} =”.format(num1, num2) solved I can’t make this in to a for loop
let’s say n=3 int n =3; for(i = n-1; i >= 0; i–) { array[i]-=1; } Alternatively as @locus2k points out we can also iterate through the array starting at the 0th index as so int n = 3; for(i = 0; i < n; i++) { array[i]-=1; } 2 solved I need to decrease … Read more
As has been explained, your ERROR_SW is a constant, and may not contain run-time variables If you intended $switch_ip and $timeout to also be constant values then, because use constant is evaluated at compile time, you would also have to declare and define these two variables beforehand. Like this use strict; use warnings ‘all’; my … Read more
Ok, I know how much you loved my 10000 checkboxes so since I recently moved to 50000 checkboxes I figured it would be fun to post an answer (maybe I’ll get enough downvotes to keep me going till the ultimate target of 100000 checkboxes on a single page). I updated the HTML since last time … Read more
It actually isn’t storing ‘past values’ at all. It stores the state of the program in the stack, with a frame for each method call containing data such as the current line the program is on. But there is only one value for the variable result at any time, for the current method on top … Read more
You can use pip install directly after adding C:\Program Files\Python37\Scripts to the environment PATH variable in windows. Note: The path C:\Program Files\Python37\Scripts is where pip.exe is installed or present on your computer based on Pythong version. 1 solved Why cannot install python package by cmd [closed]
Assuming: You are pasting the “url” in the jsonformatter to validate the json. Your JSON is structurally valid. The errors shown are related to the missing metadata about content that your service should expose. Typically the client that would consume any resources you may expose over the network might/would like to know (among other things): … Read more