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Java 2022-02-15 12:30:35
count the number of occurrences of a character in a string java
String someString = "elephant"; long count = someString.chars().filter(ch -> ch == 'e').count(); assertEquals(2, count); long count2 = someString.codePoints().filter(ch -> ch == 'e').count(); assertEquals(2, count2); Add solution -
Python 2022-01-31 01:15:56
df length
# Returns the number of rows in this DataFrame df.count() # 2 Add solution -
Other 2022-01-30 15:05:48
how manage pagination ef core
public static class PaginationService { public static async Task<Pagination<T>> GetPagination<T>(IQueryable<T> query, int page, string orderBy, bool orderByDesc, int pageSize) where T : class { Pagination<T> ... Add solution -
SQL 2022-01-29 12:21:34
django count sql queries
>>> from django.conf import settings >>> settings.DEBUG = True >>> from django.db import connection >>> Model.objects.count() >>> # python 3 uses print() >>> print(len(connection.queries)) 1 Add solution -
Java 2021-11-21 15:47:31
using java 8 stream to process data in java
public class Employee { private int employeeID; private String employeeName; private String employeeGender; private String employeeCountry; private String employeeState; private String employeeCity; public Employee() { // TODO Auto-generated c... Add solution -
C++ 2021-11-20 04:56:28
c++ chrono
std::chrono::steady_clock::time_point begin = std::chrono::steady_clock::now(); //other stuff std::chrono::steady_clock::time_point end = std::chrono::steady_clock::now(); std::chrono::duration_cast<std::chrono::microseconds>(end - begin).count() /... Add solution
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