I need to generate a RegEx pattern for a file name validation. But I am not used to RegEx pattern. I did try to generate patterns by using think link. I generated a pattern (^.*$)|(^.*i.*$) but it is not working as desired and got new pattern ^d+(?:_[A-Za-z]+)?$ from an answer but some new conditions are required which I have listed
Category: Questions
Java8 Streams: How to preserve the value before map to be accessed by collect/groupingBy functions
I’m using Java8 Streams to iterate through a list and for each of the element I invoke map and then I need to aggregate the results. My problem is that when I call groupingBy I also need to access the original object before calling map. Here is a snippet: The problem is with the call to Collectors.summarizingLong(item.getCount()) since item at
How use generic entity name in JPQL
I have three tables with same column name and types, what changes is just the table name. Example: | TABLE1 | TABLE2 | TABLE3 | | —— | —— | ——- | | ID | ID | ID | | NAME | NAME | NAME | | FOO | FOO | FOO | | BAR | BAR | BAR |
How to reduce the cold start time when using MySQL with Lambda?
I am trying to deploy a REST API with Java, using AWS Lambda, API Gateway and Amazon RDS (MySQL). Below is my Lambda class My pom file Now, checkout the loading time tracked from X Ray, which we usually call as cold start It looks like the init process takes time. When further observed, I noticed most of the time
Validating credentials using JDBC against PostgreSQL
So I’ve been trying to get my credentials to be validated when I log in to my server. This is the simple set of data I am trying to validate. (456789, ‘Dave123’, ‘password’, ‘Dave’, ‘Davidson’, ‘dave@dadavid’, 2), (123456, ‘John456’, ‘123456’, ‘John’, ‘Johnson’, ‘john@jojohn’, 1), (456878, ‘Kate789’, ‘abcdef’, ‘Kate’, ‘Kateson’, ‘kate@kitkat’, 1) So when it finishes validating, if the username and
How can we check whether the device support HS2.0(Hotspot 2.0) or Passpoint Configuration in Android?
Most of the devices above Android 10 is supporting the Passpoint Configuration or Hostspot 2.0. But not all Lower than Android 10 devices not supporting this functionality. Is there any way so that we can check for Passpoint Configuration support before adding it. Answer Below code snippet will return result that whether the device is supporting passpoint (Hotspot 2.0) or
How Can Show InterAd After X Clicks?
How can show the interstitial ads after 2 button clicks in this code java ? “Lastes SDK Admob 20.2.0” Answer You can store a variable like clickCount and everytime its even value ie. modulo by 2 == 0 you could show the ad right? int clickCount = 0;
Spring Find by unique properties
Given 1 relational table Doctor_ID Client_ID 2 2 2 3 2 4 3 5 4 2 4 3 And I want all the occurrences where client_id is not equals to 3, ignoring the same doctor_id. In this example, I would only get the 4th row… Doctor_ID Client_ID 3 5 How could I achieve something like that? Answer This query with
How to store Form data in a H2 Database (currently works using POSTman, but not the website form)
I am just teaching myself the Spring framework and am trying to makie a simple library app which stores user (book) inputs in a form in the H2 Database, and then shows the user the newly inputted data from the H2 Database. Form submission attempt 1: I now have a working POST method which correctly saves a new book to
When uploading a image for one user to firebase storage, the link of the image updates for every user in database
I’m creating this app in Android Studio using Firebase Realtime Database and Firebase Storage. When a user registers through my app the data will store in the Firebase Realtime Database. Then on the profile page, there is a place to upload a picture. When a user uploads a picture it will store in the firebase storage and the link will