No, HashSet is not thread-safe. You can use your own synchronization around it to use it in a thread-safe way: boolean wasAdded; synchronized(hset) { wasAdded = hset.add(thingToAdd); } If you really need lock-free performance, then you can use the keys of a ConcurrentHashMap as a set: boolean wasAdded = chmap.putIfAbsent(thingToAdd,whatever) == null; Keep in mind, … Read more
You should use strategy as rolling update with max surge and max unavailable defined for morer information go here https://kubernetes.io/docs/concepts/workloads/controllers/deployment/ solved Deploy a feature with zero downtime
Your problem is that you are formatting your dates in %d-%m-%Y format, which will not work in a BETWEEN expression because it uses string comparison; for example the date 10-01-2999 would be between 09-01-2022 and 11-01-2022. You need to format them as %Y-%m-%d for BETWEEN to work correctly. If the dates in your table are … Read more
Given JSON data and a query, there is no option in jq that, instead of printing the value itself, prints the location of possible matches. This is because JSON parsers providing an interface to developers usually focus on processing the logical structure of a JSON input, not the textual stream conveying it. You would have … Read more
As your class above has atleast two responsibilities i.e. creating a database connection and performing CRUD operations on the entities, so I think it violates the SOLID’s single responsibility principle. You might create a seperate class to deal with the Database connection and register it as a dependency (through an interface) to the Database class … Read more
Please read documents carefully before asking! There is no syntax format like “when + environment”. Try “when + expression”, for example: stage(“example”) { when { expression { return egText.contains(“abcd”) } } Beside that, about environment: The environment directive specifies a sequence of key-value pairs which will be defined as environment variables for all steps, or … Read more
You can use https://www.typescriptlang.org/docs/handbook/2/narrowing.html#using-type-predicates But you need to pass the variable const isLoaded = (response: ResponseData | undefined): response is ResponseData => { // some complex logic to check if the data is loaded and correct return !isLoading && !!data && Object.keys(data).length > 0 } return ( <> <div>My data title:</div> {isLoaded(data) && <div>{data.title}</div>} // … Read more
First thing first notifyDataSetChanged() only will work with the same reference of dataset . And you have created a new list int your adapter’s constructor . So you are going nowhere from here . It should as simple as . private ArrayList mArraylist = new ArrayList(); public MenuGridViewAdapter(Activity activity, ArrayList mArraylist) { this.activity = activity; … Read more
You could set a ‘baseDate’ in your code as ‘1/13/2018’ in order to compare it with today’s date. Then you just need to get the days in between, and get its “module 3” value: Dim baseDateString = “14/01/2018” Dim baseDate As Date = Date.ParseExact(baseDateString, “dd/MM/yyyy”, System.Globalization.DateTimeFormatInfo.InvariantInfo) Dim datetimeBetween = DateTime.Today.Subtract(baseDate) Dim daysBetween = datetimeBetween.Days Dim … Read more
Since you are interested in Type Checking, You may want to reverse your Logic a little bit like so: def log_in(): user_name1 = “xyz” user_name = input(“Enter your username:\n”) # str() try: # FOR YOUR USE CASE, IT WOULD SUFFICE TO SIMPLY TRY TO CAST THE ENTERED # INPUT TO AN INT (INITIALLY) – REGARDLESS … Read more
Have you installed correctly pip on your computer to install virtualenvwrapper ? : py -m pip install py -m pip install –upgrade pip When you have pip : py -m pip install virtualenvwrapper To start your virtualenv correctly : py -m venv /path/vers/projet/myproject To go on your project before using command : workon myproject To … Read more
The value output by your first rand() call: cout << (rand()%6) << endl ; is not the same as the value tested in your second call: if((rand()%6) <= 3) { You cannot infer the later from the former. To get a grasp of it, replace your if test with: const int alea = rand() % … Read more
This is all about noticing patterns in a pyramid. The comment for the first for loop says that it is printing the correct number of spaces before the actual pyramid (i.e. the asterisks). Let’s look at how many spaces there are at each level: * level 0 – 4 spaces *** level 1 – 3 … Read more
You can achieve output this way.. $data=”{ “AAL”: { “id”: “32313”, “airport_name”: “Aalborg”, “latitude”: “57.1”, “longitude”: “9.85”, “timezone”: “2”, “dst_indicator”: “E”, “city”: “Aalborg”, “country”: “Denmark”, “country_code”: “DK”, “region”: “TC1”, “listing_display”: “true”, “pseudonyms”: “” }, “AAR”: { “id”: “32314”, “airport_name”: “Tirstrup”, “latitude”: “56.15”, “longitude”: “10.2167”, “timezone”: “2”, “dst_indicator”: “E”, “city”: “Aarhus”, “country”: “Denmark”, “country_code”: “DK”, “region”: … Read more
Why did they pass the src object to FileInputStream? Because FileInputStream will need a File to instantiate. src is an instance of File. Why did they pass FileInputStream object to xssfworkbook? Because XSSFWorkbook needs a FileInputStream to instantiate. fis is a FileInputStream. Why they did’nt pass any objects for xssfsheet? Because the sheet can be … Read more